<?xml version="1.0" encoding="us-ascii" standalone="yes"?>
<!--Created by 2H Software, Powered by IRIS Carbon, Unique Code 6a71b33e792642d11c16749e, Generated At Tue, 04 Aug 2026 09:40:45 GMT-->
<link:linkbase xmlns:xbrldt="http://xbrl.org/2005/xbrldt" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xl="http://www.xbrl.org/2003/XLink" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xbrli="http://www.xbrl.org/2003/instance" xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd">
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/domain-member" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#domain-member" />
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/all" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#all" />
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#hypercube-dimension" />
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-domain" />
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-default" />
  <link:roleRef roleURI="http://eveairmobility.com/role/ShareBasedCompensationTables" xlink:type="simple" xlink:href="evex-20260630.xsd#ShareBasedCompensationTables" />
  <link:roleRef roleURI="http://eveairmobility.com/role/SummaryofSignificantAccountingPoliciesDetails1" xlink:type="simple" xlink:href="evex-20260630.xsd#SummaryofSignificantAccountingPoliciesDetails1" />
  <link:roleRef roleURI="http://eveairmobility.com/role/SummaryofSignificantAccountingPoliciesDetails2" xlink:type="simple" xlink:href="evex-20260630.xsd#SummaryofSignificantAccountingPoliciesDetails2" />
  <link:roleRef roleURI="http://eveairmobility.com/role/FinancialInvestmentsDetails" xlink:type="simple" xlink:href="evex-20260630.xsd#FinancialInvestmentsDetails" />
  <link:roleRef roleURI="http://eveairmobility.com/role/RelatedPartyTransactionsDetails" xlink:type="simple" xlink:href="evex-20260630.xsd#RelatedPartyTransactionsDetails" />
  <link:roleRef roleURI="http://eveairmobility.com/role/RelatedPartyTransactionsDetails2" xlink:type="simple" xlink:href="evex-20260630.xsd#RelatedPartyTransactionsDetails2" />
  <link:roleRef roleURI="http://eveairmobility.com/role/CommonStockWarrantsDetails" xlink:type="simple" xlink:href="evex-20260630.xsd#CommonStockWarrantsDetails" />
  <link:roleRef roleURI="http://eveairmobility.com/role/CommonStockWarrantsDetails2Textuals" xlink:type="simple" xlink:href="evex-20260630.xsd#CommonStockWarrantsDetails2Textuals" />
  <link:roleRef roleURI="http://eveairmobility.com/role/WarrantLiabilityDetailsTextuals" xlink:type="simple" xlink:href="evex-20260630.xsd#WarrantLiabilityDetailsTextuals" />
  <link:roleRef roleURI="http://eveairmobility.com/role/FairValueMeasurementsDetails" xlink:type="simple" xlink:href="evex-20260630.xsd#FairValueMeasurementsDetails" />
  <link:roleRef roleURI="http://eveairmobility.com/role/FairValueMeasurementsDetails1Textuals" xlink:type="simple" xlink:href="evex-20260630.xsd#FairValueMeasurementsDetails1Textuals" />
  <link:roleRef roleURI="http://eveairmobility.com/role/ShareBasedCompensationScheduleofrestrictedstockunitsawardactivitiesDetails" xlink:type="simple" xlink:href="evex-20260630.xsd#ShareBasedCompensationScheduleofrestrictedstockunitsawardactivitiesDetails" />
  <link:roleRef roleURI="http://eveairmobility.com/role/ShareBasedCompensationDetailsTextuals" xlink:type="simple" xlink:href="evex-20260630.xsd#ShareBasedCompensationDetailsTextuals" />
  <link:roleRef roleURI="http://eveairmobility.com/role/EarningsPerShareDetails1" xlink:type="simple" xlink:href="evex-20260630.xsd#EarningsPerShareDetails1" />
  <link:roleRef roleURI="http://eveairmobility.com/role/LeasesDetails1" xlink:type="simple" xlink:href="evex-20260630.xsd#LeasesDetails1" />
  <link:roleRef roleURI="http://eveairmobility.com/role/SegmentsDetails" xlink:type="simple" xlink:href="evex-20260630.xsd#SegmentsDetails" />
  <link:roleRef roleURI="http://eveairmobility.com/role/FairvaluemeasurementDetails3Textuals" xlink:type="simple" xlink:href="evex-20260630.xsd#FairvaluemeasurementDetails3Textuals" />
  <link:roleRef roleURI="http://eveairmobility.com/role/ResearchandDevelopmentExpensesDetails1Textuals" xlink:type="simple" xlink:href="evex-20260630.xsd#ResearchandDevelopmentExpensesDetails1Textuals" />
  <link:roleRef roleURI="http://eveairmobility.com/role/EquityDetails" xlink:type="simple" xlink:href="evex-20260630.xsd#EquityDetails" />
  <link:roleRef roleURI="http://eveairmobility.com/role/SellingDetails" xlink:type="simple" xlink:href="evex-20260630.xsd#SellingDetails" />
  <link:roleRef roleURI="http://eveairmobility.com/role/WarrantliabilitiesDetailsTextuals" xlink:type="simple" xlink:href="evex-20260630.xsd#WarrantliabilitiesDetailsTextuals" />
  <link:roleRef roleURI="http://eveairmobility.com/role/SummaryofSignificantAccountingPoliciesDetails5" xlink:type="simple" xlink:href="evex-20260630.xsd#SummaryofSignificantAccountingPoliciesDetails5" />
  <link:roleRef roleURI="http://eveairmobility.com/role/SharebasedpaymentsDetails1" xlink:type="simple" xlink:href="evex-20260630.xsd#SharebasedpaymentsDetails1" />
  <link:roleRef roleURI="http://eveairmobility.com/role/FinancialandforeignexchangegainnetDetails1" xlink:type="simple" xlink:href="evex-20260630.xsd#FinancialandforeignexchangegainnetDetails1" />
  <link:roleRef roleURI="http://eveairmobility.com/role/CapitalizedsoftwarenetScheduleofCapitalizedSoftwareNetDetails" xlink:type="simple" xlink:href="evex-20260630.xsd#CapitalizedsoftwarenetScheduleofCapitalizedSoftwareNetDetails" />
  <link:roleRef roleURI="http://eveairmobility.com/role/FinancialinstrumentsDetails" xlink:type="simple" xlink:href="evex-20260630.xsd#FinancialinstrumentsDetails" />
  <link:roleRef roleURI="http://eveairmobility.com/role/FinancialinstrumentsDetails1" xlink:type="simple" xlink:href="evex-20260630.xsd#FinancialinstrumentsDetails1" />
  <link:roleRef roleURI="http://eveairmobility.com/role/FinancialinstrumentsDetails2" xlink:type="simple" xlink:href="evex-20260630.xsd#FinancialinstrumentsDetails2" />
  <link:roleRef roleURI="http://eveairmobility.com/role/FinancialInstrumentsDetails3" xlink:type="simple" xlink:href="evex-20260630.xsd#FinancialInstrumentsDetails3" />
  <link:roleRef roleURI="http://eveairmobility.com/role/FinancialInstrumentsDetails4" xlink:type="simple" xlink:href="evex-20260630.xsd#FinancialInstrumentsDetails4" />
  <link:roleRef roleURI="http://eveairmobility.com/role/FinancialInstrumentsDetails5" xlink:type="simple" xlink:href="evex-20260630.xsd#FinancialInstrumentsDetails5" />
  <link:roleRef roleURI="http://eveairmobility.com/role/FinancialInstrumentsDetails6Textuals" xlink:type="simple" xlink:href="evex-20260630.xsd#FinancialInstrumentsDetails6Textuals" />
  <link:roleRef roleURI="http://eveairmobility.com/role/LiquidityDetails" xlink:type="simple" xlink:href="evex-20260630.xsd#LiquidityDetails" />
  <link:roleRef roleURI="http://eveairmobility.com/role/SellingGeneralandAdministrativeExpensesDetails1Textuals" xlink:type="simple" xlink:href="evex-20260630.xsd#SellingGeneralandAdministrativeExpensesDetails1Textuals" />
  <link:roleRef roleURI="http://eveairmobility.com/role/StockholdersequityDetails1" xlink:type="simple" xlink:href="evex-20260630.xsd#StockholdersequityDetails1" />
  <link:roleRef roleURI="http://fasb.org/us-gaap/role/eedm/ExtensibleEnumerationLists" xlink:type="simple" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-roles-2025.xsd#eedm" />
  <link:roleRef roleURI="http://eveairmobility.com/role/DerivativeFinancialInstrumentsDerivativeInstrumentsGainLossDetails" xlink:type="simple" xlink:href="evex-20260630.xsd#DerivativeFinancialInstrumentsDerivativeInstrumentsGainLossDetails" />
  <link:roleRef roleURI="http://eveairmobility.com/role/OrganizationandBasisofPresentationDetails" xlink:type="simple" xlink:href="evex-20260630.xsd#OrganizationandBasisofPresentationDetails" />
  <link:roleRef roleURI="http://eveairmobility.com/role/EquityDetailsTextuals" xlink:type="simple" xlink:href="evex-20260630.xsd#EquityDetailsTextuals" />
  <link:roleRef roleURI="http://eveairmobility.com/role/CommonStockWarrantsDetails1Textuals" xlink:type="simple" xlink:href="evex-20260630.xsd#CommonStockWarrantsDetails1Textuals" />
  <link:roleRef roleURI="http://eveairmobility.com/role/ComprehensiveincomeDetails" xlink:type="simple" xlink:href="evex-20260630.xsd#ComprehensiveincomeDetails" />
  <link:roleRef roleURI="http://eveairmobility.com/role/SummaryofSignificantAccountingPoliciesDetails3Textuals" xlink:type="simple" xlink:href="evex-20260630.xsd#SummaryofSignificantAccountingPoliciesDetails3Textuals" />
  <link:roleRef roleURI="http://eveairmobility.com/role/ResearchandDevelopmentExpensesDetails" xlink:type="simple" xlink:href="evex-20260630.xsd#ResearchandDevelopmentExpensesDetails" />
  <link:roleRef roleURI="http://eveairmobility.com/role/RelatedPartyTransactionsDetails1Textuals" xlink:type="simple" xlink:href="evex-20260630.xsd#RelatedPartyTransactionsDetails1Textuals" />
  <link:roleRef roleURI="http://eveairmobility.com/role/DocumentandEntityInformation" xlink:type="simple" xlink:href="evex-20260630.xsd#DocumentandEntityInformation" />
  <link:roleRef roleURI="http://eveairmobility.com/role/OtherBalanceSheetComponentsDetails" xlink:type="simple" xlink:href="evex-20260630.xsd#OtherBalanceSheetComponentsDetails" />
  <link:roleRef roleURI="http://eveairmobility.com/role/OtherBalanceSheetComponentsDetails1" xlink:type="simple" xlink:href="evex-20260630.xsd#OtherBalanceSheetComponentsDetails1" />
  <link:roleRef roleURI="http://eveairmobility.com/role/LeasesDetails" xlink:type="simple" xlink:href="evex-20260630.xsd#LeasesDetails" />
  <link:roleRef roleURI="http://eveairmobility.com/role/LeasesDetails3Textuals" xlink:type="simple" xlink:href="evex-20260630.xsd#LeasesDetails3Textuals" />
  <link:roleRef roleURI="http://eveairmobility.com/role/SubsequentEventsDetailsTextuals" xlink:type="simple" xlink:href="evex-20260630.xsd#SubsequentEventsDetailsTextuals" />
  <link:roleRef roleURI="http://eveairmobility.com/role/DebtDetails2Textuals" xlink:type="simple" xlink:href="evex-20260630.xsd#DebtDetails2Textuals" />
  <link:roleRef roleURI="http://eveairmobility.com/role/GrantsDetailsTextual" xlink:type="simple" xlink:href="evex-20260630.xsd#GrantsDetailsTextual" />
  <link:roleRef roleURI="http://eveairmobility.com/role/CONDENSEDCONSOLIDATEDBALANCESHEETS" xlink:type="simple" xlink:href="evex-20260630.xsd#CONDENSEDCONSOLIDATEDBALANCESHEETS" />
  <link:roleRef roleURI="http://eveairmobility.com/role/OtherBalanceSheetComponentsDetails3Textuals" xlink:type="simple" xlink:href="evex-20260630.xsd#OtherBalanceSheetComponentsDetails3Textuals" />
  <link:roleRef roleURI="http://eveairmobility.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFEQUITY" xlink:type="simple" xlink:href="evex-20260630.xsd#CONDENSEDCONSOLIDATEDSTATEMENTSOFEQUITY" />
  <link:roleRef roleURI="http://eveairmobility.com/role/IncomeTaxesDetailsTextuals" xlink:type="simple" xlink:href="evex-20260630.xsd#IncomeTaxesDetailsTextuals" />
  <link:roleRef roleURI="http://eveairmobility.com/role/CommitmentsandContingenciesDetails" xlink:type="simple" xlink:href="evex-20260630.xsd#CommitmentsandContingenciesDetails" />
  <link:roleRef roleURI="http://eveairmobility.com/role/SellingGeneralandAdministrativeExpensesDetails" xlink:type="simple" xlink:href="evex-20260630.xsd#SellingGeneralandAdministrativeExpensesDetails" />
  <link:roleRef roleURI="http://eveairmobility.com/role/CONDENSEDCONSOLIDATEDBALANCESHEETSParenthetical" xlink:type="simple" xlink:href="evex-20260630.xsd#CONDENSEDCONSOLIDATEDBALANCESHEETSParenthetical" />
  <link:roleRef roleURI="http://eveairmobility.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFOPERATIONS" xlink:type="simple" xlink:href="evex-20260630.xsd#CONDENSEDCONSOLIDATEDSTATEMENTSOFOPERATIONS" />
  <link:roleRef roleURI="http://eveairmobility.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCOMPREHENSIVELOSS" xlink:type="simple" xlink:href="evex-20260630.xsd#CONDENSEDCONSOLIDATEDSTATEMENTSOFCOMPREHENSIVELOSS" />
  <link:roleRef roleURI="http://eveairmobility.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS" xlink:type="simple" xlink:href="evex-20260630.xsd#CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS" />
  <link:roleRef roleURI="http://eveairmobility.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWSParenthetical" xlink:type="simple" xlink:href="evex-20260630.xsd#CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWSParenthetical" />
  <link:roleRef roleURI="http://eveairmobility.com/role/OrganizationandBasisofPresentation" xlink:type="simple" xlink:href="evex-20260630.xsd#OrganizationandBasisofPresentation" />
  <link:roleRef roleURI="http://eveairmobility.com/role/SummaryOfSignificantAccountingPolicies" xlink:type="simple" xlink:href="evex-20260630.xsd#SummaryOfSignificantAccountingPolicies" />
  <link:roleRef roleURI="http://eveairmobility.com/role/CashandCashEquivalents" xlink:type="simple" xlink:href="evex-20260630.xsd#CashandCashEquivalents" />
  <link:roleRef roleURI="http://eveairmobility.com/role/FinancialInvestments" xlink:type="simple" xlink:href="evex-20260630.xsd#FinancialInvestments" />
  <link:roleRef roleURI="http://eveairmobility.com/role/RelatedPartyTransactions" xlink:type="simple" xlink:href="evex-20260630.xsd#RelatedPartyTransactions" />
  <link:roleRef roleURI="http://eveairmobility.com/role/OtherBalanceSheetComponents" xlink:type="simple" xlink:href="evex-20260630.xsd#OtherBalanceSheetComponents" />
  <link:roleRef roleURI="http://eveairmobility.com/role/Debt" xlink:type="simple" xlink:href="evex-20260630.xsd#Debt" />
  <link:roleRef roleURI="http://eveairmobility.com/role/Equity" xlink:type="simple" xlink:href="evex-20260630.xsd#Equity" />
  <link:roleRef roleURI="http://eveairmobility.com/role/CommonStockWarrants" xlink:type="simple" xlink:href="evex-20260630.xsd#CommonStockWarrants" />
  <link:roleRef roleURI="http://eveairmobility.com/role/WarrantLiability" xlink:type="simple" xlink:href="evex-20260630.xsd#WarrantLiability" />
  <link:roleRef roleURI="http://eveairmobility.com/role/FairValueMeasurements" xlink:type="simple" xlink:href="evex-20260630.xsd#FairValueMeasurements" />
  <link:roleRef roleURI="http://eveairmobility.com/role/ShareBasedCompensation" xlink:type="simple" xlink:href="evex-20260630.xsd#ShareBasedCompensation" />
  <link:roleRef roleURI="http://eveairmobility.com/role/EarningsPerShare" xlink:type="simple" xlink:href="evex-20260630.xsd#EarningsPerShare" />
  <link:roleRef roleURI="http://eveairmobility.com/role/ResearchandDevelopmentExpenses" xlink:type="simple" xlink:href="evex-20260630.xsd#ResearchandDevelopmentExpenses" />
  <link:roleRef roleURI="http://eveairmobility.com/role/SellingGeneralandAdministrativeExpenses" xlink:type="simple" xlink:href="evex-20260630.xsd#SellingGeneralandAdministrativeExpenses" />
  <link:roleRef roleURI="http://eveairmobility.com/role/IncomeTaxes" xlink:type="simple" xlink:href="evex-20260630.xsd#IncomeTaxes" />
  <link:roleRef roleURI="http://eveairmobility.com/role/Leases" xlink:type="simple" xlink:href="evex-20260630.xsd#Leases" />
  <link:roleRef roleURI="http://eveairmobility.com/role/CommitmentsandContingencies" xlink:type="simple" xlink:href="evex-20260630.xsd#CommitmentsandContingencies" />
  <link:roleRef roleURI="http://eveairmobility.com/role/Segments" xlink:type="simple" xlink:href="evex-20260630.xsd#Segments" />
  <link:roleRef roleURI="http://eveairmobility.com/role/Grants" xlink:type="simple" xlink:href="evex-20260630.xsd#Grants" />
  <link:roleRef roleURI="http://eveairmobility.com/role/SubsequentEvents" xlink:type="simple" xlink:href="evex-20260630.xsd#SubsequentEvents" />
  <link:roleRef roleURI="http://eveairmobility.com/role/OrganizationandBasisofPresentationPolicies" xlink:type="simple" xlink:href="evex-20260630.xsd#OrganizationandBasisofPresentationPolicies" />
  <link:roleRef roleURI="http://eveairmobility.com/role/OrganizationandBasisofPresentationTables" xlink:type="simple" xlink:href="evex-20260630.xsd#OrganizationandBasisofPresentationTables" />
  <link:roleRef roleURI="http://eveairmobility.com/role/CashandCashEquivalentsTables" xlink:type="simple" xlink:href="evex-20260630.xsd#CashandCashEquivalentsTables" />
  <link:roleRef roleURI="http://eveairmobility.com/role/FinancialInvestmentsTables" xlink:type="simple" xlink:href="evex-20260630.xsd#FinancialInvestmentsTables" />
  <link:roleRef roleURI="http://eveairmobility.com/role/RelatedPartyTransactionsTables" xlink:type="simple" xlink:href="evex-20260630.xsd#RelatedPartyTransactionsTables" />
  <link:roleRef roleURI="http://eveairmobility.com/role/OtherBalanceSheetComponentsTables" xlink:type="simple" xlink:href="evex-20260630.xsd#OtherBalanceSheetComponentsTables" />
  <link:roleRef roleURI="http://eveairmobility.com/role/DebtTables" xlink:type="simple" xlink:href="evex-20260630.xsd#DebtTables" />
  <link:roleRef roleURI="http://eveairmobility.com/role/EquityTables" xlink:type="simple" xlink:href="evex-20260630.xsd#EquityTables" />
  <link:roleRef roleURI="http://eveairmobility.com/role/CommonStockWarrantsTables" xlink:type="simple" xlink:href="evex-20260630.xsd#CommonStockWarrantsTables" />
  <link:roleRef roleURI="http://eveairmobility.com/role/FairValueMeasurementsTables" xlink:type="simple" xlink:href="evex-20260630.xsd#FairValueMeasurementsTables" />
  <link:roleRef roleURI="http://eveairmobility.com/role/EarningsPerShareTables" xlink:type="simple" xlink:href="evex-20260630.xsd#EarningsPerShareTables" />
  <link:roleRef roleURI="http://eveairmobility.com/role/ResearchAndDevelopmentTables" xlink:type="simple" xlink:href="evex-20260630.xsd#ResearchAndDevelopmentTables" />
  <link:roleRef roleURI="http://eveairmobility.com/role/SellingGeneralandAdministrativeExpensesTables" xlink:type="simple" xlink:href="evex-20260630.xsd#SellingGeneralandAdministrativeExpensesTables" />
  <link:roleRef roleURI="http://eveairmobility.com/role/IncomeTaxesTables" xlink:type="simple" xlink:href="evex-20260630.xsd#IncomeTaxesTables" />
  <link:roleRef roleURI="http://eveairmobility.com/role/LeasesTables" xlink:type="simple" xlink:href="evex-20260630.xsd#LeasesTables" />
  <link:roleRef roleURI="http://eveairmobility.com/role/SegmentsTables" xlink:type="simple" xlink:href="evex-20260630.xsd#SegmentsTables" />
  <link:roleRef roleURI="http://eveairmobility.com/role/CashandCashEquivalentsDetails" xlink:type="simple" xlink:href="evex-20260630.xsd#CashandCashEquivalentsDetails" />
  <link:roleRef roleURI="http://eveairmobility.com/role/FinancialInvestmentsDetails1Textuals" xlink:type="simple" xlink:href="evex-20260630.xsd#FinancialInvestmentsDetails1Textuals" />
  <link:roleRef roleURI="http://eveairmobility.com/role/RelatedPartyTransactionsDetails1" xlink:type="simple" xlink:href="evex-20260630.xsd#RelatedPartyTransactionsDetails1" />
  <link:roleRef roleURI="http://eveairmobility.com/role/DebtDetails" xlink:type="simple" xlink:href="evex-20260630.xsd#DebtDetails" />
  <link:roleRef roleURI="http://eveairmobility.com/role/DebtDetailsCalc2" xlink:type="simple" xlink:href="evex-20260630.xsd#DebtDetailsCalc2" />
  <link:roleRef roleURI="http://eveairmobility.com/role/DebtDetails1" xlink:type="simple" xlink:href="evex-20260630.xsd#DebtDetails1" />
  <link:roleRef roleURI="http://eveairmobility.com/role/EarningsPerShareDetails" xlink:type="simple" xlink:href="evex-20260630.xsd#EarningsPerShareDetails" />
  <link:roleRef roleURI="http://eveairmobility.com/role/EarningsPerShareDetails2Textuals" xlink:type="simple" xlink:href="evex-20260630.xsd#EarningsPerShareDetails2Textuals" />
  <link:roleRef roleURI="http://eveairmobility.com/role/CommitmentsandContingenciesDetailsTextuals" xlink:type="simple" xlink:href="evex-20260630.xsd#CommitmentsandContingenciesDetailsTextuals" />
  <link:roleRef roleURI="http://eveairmobility.com/role/SegmentsDetails1Textuals" xlink:type="simple" xlink:href="evex-20260630.xsd#SegmentsDetails1Textuals" />
  <link:roleRef roleURI="http://eveairmobility.com/role/ShareBasedCompensationScheduleofsharebasedcompensationplanexpenseandtaxbenefitsDetails" xlink:type="simple" xlink:href="evex-20260630.xsd#ShareBasedCompensationScheduleofsharebasedcompensationplanexpenseandtaxbenefitsDetails" />
  <link:roleRef roleURI="http://eveairmobility.com/role/LeasesDetails2" xlink:type="simple" xlink:href="evex-20260630.xsd#LeasesDetails2" />
  <link:roleRef roleURI="http://eveairmobility.com/role/FairvaluemeasurementDetails4" xlink:type="simple" xlink:href="evex-20260630.xsd#FairvaluemeasurementDetails4" />
  <link:roleRef roleURI="http://eveairmobility.com/role/FinancialandforeignexchangegainnetDetails" xlink:type="simple" xlink:href="evex-20260630.xsd#FinancialandforeignexchangegainnetDetails" />
  <link:roleRef roleURI="http://eveairmobility.com/role/FinancialandforeignexchangegainnetDetailsCalc2" xlink:type="simple" xlink:href="evex-20260630.xsd#FinancialandforeignexchangegainnetDetailsCalc2" />
  <link:roleRef roleURI="http://eveairmobility.com/role/IncomeTaxesDetails2" xlink:type="simple" xlink:href="evex-20260630.xsd#IncomeTaxesDetails2" />
  <link:roleRef roleURI="http://eveairmobility.com/role/IncomeTaxesDetails3" xlink:type="simple" xlink:href="evex-20260630.xsd#IncomeTaxesDetails3" />
  <link:roleRef roleURI="http://eveairmobility.com/role/OtherBalanceSheetComponentsDetails2" xlink:type="simple" xlink:href="evex-20260630.xsd#OtherBalanceSheetComponentsDetails2" />
  <link:definitionLink xlink:type="extended" xlink:role="http://eveairmobility.com/role/ShareBasedCompensationTables">
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:title="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfShareBasedCompensationRestrictedStockUnitsAwardActivityTableTextBlock" xlink:label="us-gaap_ScheduleOfShareBasedCompensationRestrictedStockUnitsAwardActivityTableTextBlock" xlink:title="us-gaap_ScheduleOfShareBasedCompensationRestrictedStockUnitsAwardActivityTableTextBlock" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:to="us-gaap_ScheduleOfShareBasedCompensationRestrictedStockUnitsAwardActivityTableTextBlock" xlink:title="Definition : us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems to us-gaap_ScheduleOfShareBasedCompensationRestrictedStockUnitsAwardActivityTableTextBlock" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfCompensationCostForShareBasedPaymentArrangementsAllocationOfShareBasedCompensationCostsByPlanTableTextBlock" xlink:label="us-gaap_ScheduleOfCompensationCostForShareBasedPaymentArrangementsAllocationOfShareBasedCompensationCostsByPlanTableTextBlock" xlink:title="us-gaap_ScheduleOfCompensationCostForShareBasedPaymentArrangementsAllocationOfShareBasedCompensationCostsByPlanTableTextBlock" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:to="us-gaap_ScheduleOfCompensationCostForShareBasedPaymentArrangementsAllocationOfShareBasedCompensationCostsByPlanTableTextBlock" xlink:title="Definition : us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems to us-gaap_ScheduleOfCompensationCostForShareBasedPaymentArrangementsAllocationOfShareBasedCompensationCostsByPlanTableTextBlock" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:label="us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:title="us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:to="us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:title="Definition : us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems to us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:type="arc" use="optional" order="2" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_ConditionTypeAxis" xlink:label="evex_ConditionTypeAxis" xlink:title="evex_ConditionTypeAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:to="evex_ConditionTypeAxis" xlink:title="Definition : us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable to evex_ConditionTypeAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_ConditionTypeDomain" xlink:label="evex_ConditionTypeDomain" xlink:title="evex_ConditionTypeDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="evex_ConditionTypeAxis" xlink:to="evex_ConditionTypeDomain" xlink:title="Definition : evex_ConditionTypeAxis to evex_ConditionTypeDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_ServiceConditionsMember" xlink:label="evex_ServiceConditionsMember" xlink:title="evex_ServiceConditionsMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="evex_ConditionTypeDomain" xlink:to="evex_ServiceConditionsMember" xlink:title="Definition : evex_ConditionTypeDomain to evex_ServiceConditionsMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_MarketConditionsMember" xlink:label="evex_MarketConditionsMember" xlink:title="evex_MarketConditionsMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="evex_ConditionTypeDomain" xlink:to="evex_MarketConditionsMember" xlink:title="Definition : evex_ConditionTypeDomain to evex_MarketConditionsMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_ConditionTypeDomain" xlink:label="evex_ConditionTypeDomain_1" xlink:title="evex_ConditionTypeDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="evex_ConditionTypeAxis" xlink:to="evex_ConditionTypeDomain_1" xlink:title="Definition : evex_ConditionTypeAxis to evex_ConditionTypeDomain" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
  </link:definitionLink>
  <link:definitionLink xlink:type="extended" xlink:role="http://eveairmobility.com/role/SummaryofSignificantAccountingPoliciesDetails1">
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:title="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardPerShareWeightedAveragePriceOfSharesPurchased" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardPerShareWeightedAveragePriceOfSharesPurchased" xlink:title="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardPerShareWeightedAveragePriceOfSharesPurchased" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardPerShareWeightedAveragePriceOfSharesPurchased" xlink:title="Definition : us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems to us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardPerShareWeightedAveragePriceOfSharesPurchased" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardExpirationDate" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardExpirationDate" xlink:title="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardExpirationDate" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardExpirationDate" xlink:title="Definition : us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems to us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardExpirationDate" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1" xlink:title="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:to="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1" xlink:title="Definition : us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems to us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1" xlink:type="arc" use="optional" order="2" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExercisePrice" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExercisePrice" xlink:title="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExercisePrice" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExercisePrice" xlink:title="Definition : us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems to us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExercisePrice" xlink:type="arc" use="optional" order="3" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate" xlink:title="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate" xlink:title="Definition : us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems to us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate" xlink:type="arc" use="optional" order="4" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate" xlink:title="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate" xlink:title="Definition : us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems to us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate" xlink:type="arc" use="optional" order="5" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate" xlink:title="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate" xlink:title="Definition : us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems to us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate" xlink:type="arc" use="optional" order="6" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedIntrinsicValue" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedIntrinsicValue" xlink:title="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedIntrinsicValue" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedIntrinsicValue" xlink:title="Definition : us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems to us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedIntrinsicValue" xlink:type="arc" use="optional" order="7" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:label="us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:title="us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:to="us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:title="Definition : us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems to us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:type="arc" use="optional" order="8" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AwardTypeAxis" xlink:label="us-gaap_AwardTypeAxis" xlink:title="us-gaap_AwardTypeAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:to="us-gaap_AwardTypeAxis" xlink:title="Definition : us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable to us-gaap_AwardTypeAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:label="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:title="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_AwardTypeAxis" xlink:to="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:title="Definition : us-gaap_AwardTypeAxis to us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestrictedStockUnitsRSUMember" xlink:label="us-gaap_RestrictedStockUnitsRSUMember" xlink:title="us-gaap_RestrictedStockUnitsRSUMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:to="us-gaap_RestrictedStockUnitsRSUMember" xlink:title="Definition : us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain to us-gaap_RestrictedStockUnitsRSUMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:label="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_1" xlink:title="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_AwardTypeAxis" xlink:to="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_1" xlink:title="Definition : us-gaap_AwardTypeAxis to us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_ConditionTypeAxis" xlink:label="evex_ConditionTypeAxis" xlink:title="evex_ConditionTypeAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:to="evex_ConditionTypeAxis" xlink:title="Definition : us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable to evex_ConditionTypeAxis" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_ConditionTypeDomain" xlink:label="evex_ConditionTypeDomain" xlink:title="evex_ConditionTypeDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="evex_ConditionTypeAxis" xlink:to="evex_ConditionTypeDomain" xlink:title="Definition : evex_ConditionTypeAxis to evex_ConditionTypeDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_WithoutMarketConditionsMember" xlink:label="evex_WithoutMarketConditionsMember" xlink:title="evex_WithoutMarketConditionsMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="evex_ConditionTypeDomain" xlink:to="evex_WithoutMarketConditionsMember" xlink:title="Definition : evex_ConditionTypeDomain to evex_WithoutMarketConditionsMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_WithMarketConditionsMember" xlink:label="evex_WithMarketConditionsMember" xlink:title="evex_WithMarketConditionsMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="evex_ConditionTypeDomain" xlink:to="evex_WithMarketConditionsMember" xlink:title="Definition : evex_ConditionTypeDomain to evex_WithMarketConditionsMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_ConditionTypeDomain" xlink:label="evex_ConditionTypeDomain_1" xlink:title="evex_ConditionTypeDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="evex_ConditionTypeAxis" xlink:to="evex_ConditionTypeDomain_1" xlink:title="Definition : evex_ConditionTypeAxis to evex_ConditionTypeDomain" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
  </link:definitionLink>
  <link:definitionLink xlink:type="extended" xlink:role="http://eveairmobility.com/role/SummaryofSignificantAccountingPoliciesDetails2">
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentReportingReconcilingItemForOperatingProfitLossFromSegmentToConsolidatedLineItems" xlink:label="us-gaap_SegmentReportingReconcilingItemForOperatingProfitLossFromSegmentToConsolidatedLineItems" xlink:title="us-gaap_SegmentReportingReconcilingItemForOperatingProfitLossFromSegmentToConsolidatedLineItems" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ReconciliationOfOperatingProfitLossFromSegmentsToConsolidatedTable" xlink:label="us-gaap_ReconciliationOfOperatingProfitLossFromSegmentsToConsolidatedTable" xlink:title="us-gaap_ReconciliationOfOperatingProfitLossFromSegmentsToConsolidatedTable" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="us-gaap_SegmentReportingReconcilingItemForOperatingProfitLossFromSegmentToConsolidatedLineItems" xlink:to="us-gaap_ReconciliationOfOperatingProfitLossFromSegmentsToConsolidatedTable" xlink:title="Definition : us-gaap_SegmentReportingReconcilingItemForOperatingProfitLossFromSegmentToConsolidatedLineItems to us-gaap_ReconciliationOfOperatingProfitLossFromSegmentsToConsolidatedTable" xlink:type="arc" use="optional" order="0" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementBusinessSegmentsAxis" xlink:label="us-gaap_StatementBusinessSegmentsAxis" xlink:title="us-gaap_StatementBusinessSegmentsAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ReconciliationOfOperatingProfitLossFromSegmentsToConsolidatedTable" xlink:to="us-gaap_StatementBusinessSegmentsAxis" xlink:title="Definition : us-gaap_ReconciliationOfOperatingProfitLossFromSegmentsToConsolidatedTable to us-gaap_StatementBusinessSegmentsAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentDomain" xlink:label="us-gaap_SegmentDomain" xlink:title="us-gaap_SegmentDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_StatementBusinessSegmentsAxis" xlink:to="us-gaap_SegmentDomain" xlink:title="Definition : us-gaap_StatementBusinessSegmentsAxis to us-gaap_SegmentDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_EvtolMember" xlink:label="evex_EvtolMember" xlink:title="evex_EvtolMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_SegmentDomain" xlink:to="evex_EvtolMember" xlink:title="Definition : us-gaap_SegmentDomain to evex_EvtolMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_UatmMember" xlink:label="evex_UatmMember" xlink:title="evex_UatmMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_SegmentDomain" xlink:to="evex_UatmMember" xlink:title="Definition : us-gaap_SegmentDomain to evex_UatmMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_ServiceSupportMember" xlink:label="evex_ServiceSupportMember" xlink:title="evex_ServiceSupportMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_SegmentDomain" xlink:to="evex_ServiceSupportMember" xlink:title="Definition : us-gaap_SegmentDomain to evex_ServiceSupportMember" xlink:type="arc" use="optional" order="2" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentDomain" xlink:label="us-gaap_SegmentDomain_1" xlink:title="us-gaap_SegmentDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_StatementBusinessSegmentsAxis" xlink:to="us-gaap_SegmentDomain_1" xlink:title="Definition : us-gaap_StatementBusinessSegmentsAxis to us-gaap_SegmentDomain" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidationItemsAxis" xlink:label="srt_ConsolidationItemsAxis" xlink:title="srt_ConsolidationItemsAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ReconciliationOfOperatingProfitLossFromSegmentsToConsolidatedTable" xlink:to="srt_ConsolidationItemsAxis" xlink:title="Definition : us-gaap_ReconciliationOfOperatingProfitLossFromSegmentsToConsolidatedTable to srt_ConsolidationItemsAxis" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidationItemsDomain" xlink:label="srt_ConsolidationItemsDomain" xlink:title="srt_ConsolidationItemsDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="srt_ConsolidationItemsAxis" xlink:to="srt_ConsolidationItemsDomain" xlink:title="Definition : srt_ConsolidationItemsAxis to srt_ConsolidationItemsDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CorporateNonSegmentMember" xlink:label="us-gaap_CorporateNonSegmentMember" xlink:title="us-gaap_CorporateNonSegmentMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_ConsolidationItemsDomain" xlink:to="us-gaap_CorporateNonSegmentMember" xlink:title="Definition : srt_ConsolidationItemsDomain to us-gaap_CorporateNonSegmentMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidationItemsDomain" xlink:label="srt_ConsolidationItemsDomain_1" xlink:title="srt_ConsolidationItemsDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="srt_ConsolidationItemsAxis" xlink:to="srt_ConsolidationItemsDomain_1" xlink:title="Definition : srt_ConsolidationItemsAxis to srt_ConsolidationItemsDomain" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
  </link:definitionLink>
  <link:definitionLink xlink:type="extended" xlink:role="http://eveairmobility.com/role/FinancialInvestmentsDetails">
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SummaryOfInvestmentHoldingsLineItems" xlink:label="us-gaap_SummaryOfInvestmentHoldingsLineItems" xlink:title="us-gaap_SummaryOfInvestmentHoldingsLineItems" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShortTermInvestments" xlink:label="us-gaap_ShortTermInvestments" xlink:title="us-gaap_ShortTermInvestments" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_SummaryOfInvestmentHoldingsLineItems" xlink:to="us-gaap_ShortTermInvestments" xlink:title="Definition : us-gaap_SummaryOfInvestmentHoldingsLineItems to us-gaap_ShortTermInvestments" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_UnrealizedGainOnInvestments" xlink:label="evex_UnrealizedGainOnInvestments" xlink:title="evex_UnrealizedGainOnInvestments" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_SummaryOfInvestmentHoldingsLineItems" xlink:to="evex_UnrealizedGainOnInvestments" xlink:title="Definition : us-gaap_SummaryOfInvestmentHoldingsLineItems to evex_UnrealizedGainOnInvestments" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_UnrealizedLossOnInvestments" xlink:label="evex_UnrealizedLossOnInvestments" xlink:title="evex_UnrealizedLossOnInvestments" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_SummaryOfInvestmentHoldingsLineItems" xlink:to="evex_UnrealizedLossOnInvestments" xlink:title="Definition : us-gaap_SummaryOfInvestmentHoldingsLineItems to evex_UnrealizedLossOnInvestments" xlink:type="arc" use="optional" order="2" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentOwnedAtFairValue" xlink:label="us-gaap_InvestmentOwnedAtFairValue" xlink:title="us-gaap_InvestmentOwnedAtFairValue" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_SummaryOfInvestmentHoldingsLineItems" xlink:to="us-gaap_InvestmentOwnedAtFairValue" xlink:title="Definition : us-gaap_SummaryOfInvestmentHoldingsLineItems to us-gaap_InvestmentOwnedAtFairValue" xlink:type="arc" use="optional" order="3" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfHeldToMaturitySecuritiesTable" xlink:label="us-gaap_ScheduleOfHeldToMaturitySecuritiesTable" xlink:title="us-gaap_ScheduleOfHeldToMaturitySecuritiesTable" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="us-gaap_SummaryOfInvestmentHoldingsLineItems" xlink:to="us-gaap_ScheduleOfHeldToMaturitySecuritiesTable" xlink:title="Definition : us-gaap_SummaryOfInvestmentHoldingsLineItems to us-gaap_ScheduleOfHeldToMaturitySecuritiesTable" xlink:type="arc" use="optional" order="4" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancialInstrumentAxis" xlink:label="us-gaap_FinancialInstrumentAxis" xlink:title="us-gaap_FinancialInstrumentAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ScheduleOfHeldToMaturitySecuritiesTable" xlink:to="us-gaap_FinancialInstrumentAxis" xlink:title="Definition : us-gaap_ScheduleOfHeldToMaturitySecuritiesTable to us-gaap_FinancialInstrumentAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain" xlink:label="us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain" xlink:title="us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_FinancialInstrumentAxis" xlink:to="us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain" xlink:title="Definition : us-gaap_FinancialInstrumentAxis to us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_HeldtomaturitySecuritiesMember" xlink:label="us-gaap_HeldtomaturitySecuritiesMember" xlink:title="us-gaap_HeldtomaturitySecuritiesMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain" xlink:to="us-gaap_HeldtomaturitySecuritiesMember" xlink:title="Definition : us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain to us-gaap_HeldtomaturitySecuritiesMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain" xlink:label="us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_1" xlink:title="us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_FinancialInstrumentAxis" xlink:to="us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_1" xlink:title="Definition : us-gaap_FinancialInstrumentAxis to us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
  </link:definitionLink>
  <link:definitionLink xlink:type="extended" xlink:role="http://eveairmobility.com/role/RelatedPartyTransactionsDetails">
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionLineItems" xlink:label="us-gaap_RelatedPartyTransactionLineItems" xlink:title="us-gaap_RelatedPartyTransactionLineItems" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_AllocatedCorporateCostsIncomeNetFromTransactionsWithRelatedParty" xlink:label="evex_AllocatedCorporateCostsIncomeNetFromTransactionsWithRelatedParty" xlink:title="evex_AllocatedCorporateCostsIncomeNetFromTransactionsWithRelatedParty" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="evex_AllocatedCorporateCostsIncomeNetFromTransactionsWithRelatedParty" xlink:title="Definition : us-gaap_RelatedPartyTransactionLineItems to evex_AllocatedCorporateCostsIncomeNetFromTransactionsWithRelatedParty" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:label="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:title="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:title="Definition : us-gaap_RelatedPartyTransactionLineItems to us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:type="arc" use="optional" order="1" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeStatementLocationAxis" xlink:label="us-gaap_IncomeStatementLocationAxis" xlink:title="us-gaap_IncomeStatementLocationAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:to="us-gaap_IncomeStatementLocationAxis" xlink:title="Definition : us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable to us-gaap_IncomeStatementLocationAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeStatementLocationDomain" xlink:label="us-gaap_IncomeStatementLocationDomain" xlink:title="us-gaap_IncomeStatementLocationDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_IncomeStatementLocationAxis" xlink:to="us-gaap_IncomeStatementLocationDomain" xlink:title="Definition : us-gaap_IncomeStatementLocationAxis to us-gaap_IncomeStatementLocationDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SellingGeneralAndAdministrativeExpensesMember" xlink:label="us-gaap_SellingGeneralAndAdministrativeExpensesMember" xlink:title="us-gaap_SellingGeneralAndAdministrativeExpensesMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_IncomeStatementLocationDomain" xlink:to="us-gaap_SellingGeneralAndAdministrativeExpensesMember" xlink:title="Definition : us-gaap_IncomeStatementLocationDomain to us-gaap_SellingGeneralAndAdministrativeExpensesMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ResearchAndDevelopmentExpenseMember" xlink:label="us-gaap_ResearchAndDevelopmentExpenseMember" xlink:title="us-gaap_ResearchAndDevelopmentExpenseMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_IncomeStatementLocationDomain" xlink:to="us-gaap_ResearchAndDevelopmentExpenseMember" xlink:title="Definition : us-gaap_IncomeStatementLocationDomain to us-gaap_ResearchAndDevelopmentExpenseMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeStatementLocationDomain" xlink:label="us-gaap_IncomeStatementLocationDomain_1" xlink:title="us-gaap_IncomeStatementLocationDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_IncomeStatementLocationAxis" xlink:to="us-gaap_IncomeStatementLocationDomain_1" xlink:title="Definition : us-gaap_IncomeStatementLocationAxis to us-gaap_IncomeStatementLocationDomain" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
  </link:definitionLink>
  <link:definitionLink xlink:type="extended" xlink:role="http://eveairmobility.com/role/RelatedPartyTransactionsDetails2">
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionLineItems" xlink:label="us-gaap_RelatedPartyTransactionLineItems" xlink:title="us-gaap_RelatedPartyTransactionLineItems" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_FinanceIncomeExpensesNetFromTransactionsWithRelatedParty" xlink:label="evex_FinanceIncomeExpensesNetFromTransactionsWithRelatedParty" xlink:title="evex_FinanceIncomeExpensesNetFromTransactionsWithRelatedParty" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="evex_FinanceIncomeExpensesNetFromTransactionsWithRelatedParty" xlink:title="Definition : us-gaap_RelatedPartyTransactionLineItems to evex_FinanceIncomeExpensesNetFromTransactionsWithRelatedParty" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_OperatingIncomeLossNetFromTransactionsWithRelatedParty" xlink:label="evex_OperatingIncomeLossNetFromTransactionsWithRelatedParty" xlink:title="evex_OperatingIncomeLossNetFromTransactionsWithRelatedParty" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="evex_OperatingIncomeLossNetFromTransactionsWithRelatedParty" xlink:title="Definition : us-gaap_RelatedPartyTransactionLineItems to evex_OperatingIncomeLossNetFromTransactionsWithRelatedParty" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:label="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:title="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:title="Definition : us-gaap_RelatedPartyTransactionLineItems to us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:type="arc" use="optional" order="2" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:label="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:title="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:to="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:title="Definition : us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable to us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain" xlink:label="us-gaap_RelatedPartyDomain" xlink:title="us-gaap_RelatedPartyDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:to="us-gaap_RelatedPartyDomain" xlink:title="Definition : us-gaap_RelatedPartyTransactionsByRelatedPartyAxis to us-gaap_RelatedPartyDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_EmbraerSAMember" xlink:label="evex_EmbraerSAMember" xlink:title="evex_EmbraerSAMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyDomain" xlink:to="evex_EmbraerSAMember" xlink:title="Definition : us-gaap_RelatedPartyDomain to evex_EmbraerSAMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_EmbraerAircraftHoldingIncMember" xlink:label="evex_EmbraerAircraftHoldingIncMember" xlink:title="evex_EmbraerAircraftHoldingIncMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyDomain" xlink:to="evex_EmbraerAircraftHoldingIncMember" xlink:title="Definition : us-gaap_RelatedPartyDomain to evex_EmbraerAircraftHoldingIncMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_AtechMember" xlink:label="evex_AtechMember" xlink:title="evex_AtechMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyDomain" xlink:to="evex_AtechMember" xlink:title="Definition : us-gaap_RelatedPartyDomain to evex_AtechMember" xlink:type="arc" use="optional" order="2" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_OtherRelatedPartiesMember" xlink:label="evex_OtherRelatedPartiesMember" xlink:title="evex_OtherRelatedPartiesMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyDomain" xlink:to="evex_OtherRelatedPartiesMember" xlink:title="Definition : us-gaap_RelatedPartyDomain to evex_OtherRelatedPartiesMember" xlink:type="arc" use="optional" order="3" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain" xlink:label="us-gaap_RelatedPartyDomain_1" xlink:title="us-gaap_RelatedPartyDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:to="us-gaap_RelatedPartyDomain_1" xlink:title="Definition : us-gaap_RelatedPartyTransactionsByRelatedPartyAxis to us-gaap_RelatedPartyDomain" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
  </link:definitionLink>
  <link:definitionLink xlink:type="extended" xlink:role="http://eveairmobility.com/role/CommonStockWarrantsDetails">
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems" xlink:title="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_WarrantsAndRightsOutstandingMeasurementInput" xlink:label="us-gaap_WarrantsAndRightsOutstandingMeasurementInput" xlink:title="us-gaap_WarrantsAndRightsOutstandingMeasurementInput" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems" xlink:to="us-gaap_WarrantsAndRightsOutstandingMeasurementInput" xlink:title="Definition : us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems to us-gaap_WarrantsAndRightsOutstandingMeasurementInput" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_WarrantsAndRightsOutstandingMaturityDate" xlink:label="us-gaap_WarrantsAndRightsOutstandingMaturityDate" xlink:title="us-gaap_WarrantsAndRightsOutstandingMaturityDate" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems" xlink:to="us-gaap_WarrantsAndRightsOutstandingMaturityDate" xlink:title="Definition : us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems to us-gaap_WarrantsAndRightsOutstandingMaturityDate" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_WarrantsAndRightsOutstandingTerm" xlink:label="us-gaap_WarrantsAndRightsOutstandingTerm" xlink:title="us-gaap_WarrantsAndRightsOutstandingTerm" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems" xlink:to="us-gaap_WarrantsAndRightsOutstandingTerm" xlink:title="Definition : us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems to us-gaap_WarrantsAndRightsOutstandingTerm" xlink:type="arc" use="optional" order="2" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable" xlink:title="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems" xlink:to="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable" xlink:title="Definition : us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems to us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable" xlink:type="arc" use="optional" order="3" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_ClassOfStrategicWarrantsAxis" xlink:label="evex_ClassOfStrategicWarrantsAxis" xlink:title="evex_ClassOfStrategicWarrantsAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable" xlink:to="evex_ClassOfStrategicWarrantsAxis" xlink:title="Definition : us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable to evex_ClassOfStrategicWarrantsAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_ClassOfStrategicWarrantsDomain" xlink:label="evex_ClassOfStrategicWarrantsDomain" xlink:title="evex_ClassOfStrategicWarrantsDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="evex_ClassOfStrategicWarrantsAxis" xlink:to="evex_ClassOfStrategicWarrantsDomain" xlink:title="Definition : evex_ClassOfStrategicWarrantsAxis to evex_ClassOfStrategicWarrantsDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_StrategicMarketWarrantsMember" xlink:label="evex_StrategicMarketWarrantsMember" xlink:title="evex_StrategicMarketWarrantsMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="evex_ClassOfStrategicWarrantsDomain" xlink:to="evex_StrategicMarketWarrantsMember" xlink:title="Definition : evex_ClassOfStrategicWarrantsDomain to evex_StrategicMarketWarrantsMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_ClassOfStrategicWarrantsDomain" xlink:label="evex_ClassOfStrategicWarrantsDomain_1" xlink:title="evex_ClassOfStrategicWarrantsDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="evex_ClassOfStrategicWarrantsAxis" xlink:to="evex_ClassOfStrategicWarrantsDomain_1" xlink:title="Definition : evex_ClassOfStrategicWarrantsAxis to evex_ClassOfStrategicWarrantsDomain" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancialInstrumentAxis" xlink:label="us-gaap_FinancialInstrumentAxis" xlink:title="us-gaap_FinancialInstrumentAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable" xlink:to="us-gaap_FinancialInstrumentAxis" xlink:title="Definition : us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable to us-gaap_FinancialInstrumentAxis" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain" xlink:label="us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain" xlink:title="us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_FinancialInstrumentAxis" xlink:to="us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain" xlink:title="Definition : us-gaap_FinancialInstrumentAxis to us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_StrategicWarrantsTwoMember" xlink:label="evex_StrategicWarrantsTwoMember" xlink:title="evex_StrategicWarrantsTwoMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain" xlink:to="evex_StrategicWarrantsTwoMember" xlink:title="Definition : us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain to evex_StrategicWarrantsTwoMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain" xlink:label="us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_1" xlink:title="us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_FinancialInstrumentAxis" xlink:to="us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_1" xlink:title="Definition : us-gaap_FinancialInstrumentAxis to us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MeasurementInputTypeAxis" xlink:label="us-gaap_MeasurementInputTypeAxis" xlink:title="us-gaap_MeasurementInputTypeAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable" xlink:to="us-gaap_MeasurementInputTypeAxis" xlink:title="Definition : us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable to us-gaap_MeasurementInputTypeAxis" xlink:type="arc" use="optional" order="2" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MeasurementInputTypeDomain" xlink:label="us-gaap_MeasurementInputTypeDomain" xlink:title="us-gaap_MeasurementInputTypeDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_MeasurementInputTypeAxis" xlink:to="us-gaap_MeasurementInputTypeDomain" xlink:title="Definition : us-gaap_MeasurementInputTypeAxis to us-gaap_MeasurementInputTypeDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MeasurementInputSharePriceMember" xlink:label="us-gaap_MeasurementInputSharePriceMember" xlink:title="us-gaap_MeasurementInputSharePriceMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_MeasurementInputTypeDomain" xlink:to="us-gaap_MeasurementInputSharePriceMember" xlink:title="Definition : us-gaap_MeasurementInputTypeDomain to us-gaap_MeasurementInputSharePriceMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MeasurementInputMaturityMember" xlink:label="us-gaap_MeasurementInputMaturityMember" xlink:title="us-gaap_MeasurementInputMaturityMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_MeasurementInputTypeDomain" xlink:to="us-gaap_MeasurementInputMaturityMember" xlink:title="Definition : us-gaap_MeasurementInputTypeDomain to us-gaap_MeasurementInputMaturityMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MeasurementInputExpectedTermMember" xlink:label="us-gaap_MeasurementInputExpectedTermMember" xlink:title="us-gaap_MeasurementInputExpectedTermMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_MeasurementInputTypeDomain" xlink:to="us-gaap_MeasurementInputExpectedTermMember" xlink:title="Definition : us-gaap_MeasurementInputTypeDomain to us-gaap_MeasurementInputExpectedTermMember" xlink:type="arc" use="optional" order="2" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MeasurementInputExercisePriceMember" xlink:label="us-gaap_MeasurementInputExercisePriceMember" xlink:title="us-gaap_MeasurementInputExercisePriceMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_MeasurementInputTypeDomain" xlink:to="us-gaap_MeasurementInputExercisePriceMember" xlink:title="Definition : us-gaap_MeasurementInputTypeDomain to us-gaap_MeasurementInputExercisePriceMember" xlink:type="arc" use="optional" order="3" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MeasurementInputRiskFreeInterestRateMember" xlink:label="us-gaap_MeasurementInputRiskFreeInterestRateMember" xlink:title="us-gaap_MeasurementInputRiskFreeInterestRateMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_MeasurementInputTypeDomain" xlink:to="us-gaap_MeasurementInputRiskFreeInterestRateMember" xlink:title="Definition : us-gaap_MeasurementInputTypeDomain to us-gaap_MeasurementInputRiskFreeInterestRateMember" xlink:type="arc" use="optional" order="4" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MeasurementInputOptionVolatilityMember" xlink:label="us-gaap_MeasurementInputOptionVolatilityMember" xlink:title="us-gaap_MeasurementInputOptionVolatilityMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_MeasurementInputTypeDomain" xlink:to="us-gaap_MeasurementInputOptionVolatilityMember" xlink:title="Definition : us-gaap_MeasurementInputTypeDomain to us-gaap_MeasurementInputOptionVolatilityMember" xlink:type="arc" use="optional" order="5" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MeasurementInputExpectedDividendRateMember" xlink:label="us-gaap_MeasurementInputExpectedDividendRateMember" xlink:title="us-gaap_MeasurementInputExpectedDividendRateMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_MeasurementInputTypeDomain" xlink:to="us-gaap_MeasurementInputExpectedDividendRateMember" xlink:title="Definition : us-gaap_MeasurementInputTypeDomain to us-gaap_MeasurementInputExpectedDividendRateMember" xlink:type="arc" use="optional" order="6" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_MeasurementInputGrantDateFairValueMember" xlink:label="evex_MeasurementInputGrantDateFairValueMember" xlink:title="evex_MeasurementInputGrantDateFairValueMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_MeasurementInputTypeDomain" xlink:to="evex_MeasurementInputGrantDateFairValueMember" xlink:title="Definition : us-gaap_MeasurementInputTypeDomain to evex_MeasurementInputGrantDateFairValueMember" xlink:type="arc" use="optional" order="7" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MeasurementInputTypeDomain" xlink:label="us-gaap_MeasurementInputTypeDomain_1" xlink:title="us-gaap_MeasurementInputTypeDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_MeasurementInputTypeAxis" xlink:to="us-gaap_MeasurementInputTypeDomain_1" xlink:title="Definition : us-gaap_MeasurementInputTypeAxis to us-gaap_MeasurementInputTypeDomain" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
  </link:definitionLink>
  <link:definitionLink xlink:type="extended" xlink:role="http://eveairmobility.com/role/CommonStockWarrantsDetails2Textuals">
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfStockLineItems" xlink:label="us-gaap_ClassOfStockLineItems" xlink:title="us-gaap_ClassOfStockLineItems" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights" xlink:label="us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights" xlink:title="us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ClassOfStockLineItems" xlink:to="us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights" xlink:title="Definition : us-gaap_ClassOfStockLineItems to us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1" xlink:label="us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1" xlink:title="us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ClassOfStockLineItems" xlink:to="us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1" xlink:title="Definition : us-gaap_ClassOfStockLineItems to us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_NumberOfElectricalVerticalTakeOffAndLanding" xlink:label="evex_NumberOfElectricalVerticalTakeOffAndLanding" xlink:title="evex_NumberOfElectricalVerticalTakeOffAndLanding" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ClassOfStockLineItems" xlink:to="evex_NumberOfElectricalVerticalTakeOffAndLanding" xlink:title="Definition : us-gaap_ClassOfStockLineItems to evex_NumberOfElectricalVerticalTakeOffAndLanding" xlink:type="arc" use="optional" order="2" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_StockIssuedDuringPeriodSharesWarrantsIssued" xlink:label="evex_StockIssuedDuringPeriodSharesWarrantsIssued" xlink:title="evex_StockIssuedDuringPeriodSharesWarrantsIssued" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ClassOfStockLineItems" xlink:to="evex_StockIssuedDuringPeriodSharesWarrantsIssued" xlink:title="Definition : us-gaap_ClassOfStockLineItems to evex_StockIssuedDuringPeriodSharesWarrantsIssued" xlink:type="arc" use="optional" order="3" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SharesIssued" xlink:label="us-gaap_SharesIssued" xlink:title="us-gaap_SharesIssued" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ClassOfStockLineItems" xlink:to="us-gaap_SharesIssued" xlink:title="Definition : us-gaap_ClassOfStockLineItems to us-gaap_SharesIssued" xlink:type="arc" use="optional" order="4" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockCapitalSharesReservedForFutureIssuance" xlink:label="us-gaap_CommonStockCapitalSharesReservedForFutureIssuance" xlink:title="us-gaap_CommonStockCapitalSharesReservedForFutureIssuance" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ClassOfStockLineItems" xlink:to="us-gaap_CommonStockCapitalSharesReservedForFutureIssuance" xlink:title="Definition : us-gaap_ClassOfStockLineItems to us-gaap_CommonStockCapitalSharesReservedForFutureIssuance" xlink:type="arc" use="optional" order="5" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_NumberOfCategoriesOfWarrants" xlink:label="evex_NumberOfCategoriesOfWarrants" xlink:title="evex_NumberOfCategoriesOfWarrants" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ClassOfStockLineItems" xlink:to="evex_NumberOfCategoriesOfWarrants" xlink:title="Definition : us-gaap_ClassOfStockLineItems to evex_NumberOfCategoriesOfWarrants" xlink:type="arc" use="optional" order="6" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByEachWarrantOrRight" xlink:label="us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByEachWarrantOrRight" xlink:title="us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByEachWarrantOrRight" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ClassOfStockLineItems" xlink:to="us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByEachWarrantOrRight" xlink:title="Definition : us-gaap_ClassOfStockLineItems to us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByEachWarrantOrRight" xlink:type="arc" use="optional" order="7" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_ClassOfWarrantsRedemptionPricePerUnit" xlink:label="evex_ClassOfWarrantsRedemptionPricePerUnit" xlink:title="evex_ClassOfWarrantsRedemptionPricePerUnit" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ClassOfStockLineItems" xlink:to="evex_ClassOfWarrantsRedemptionPricePerUnit" xlink:title="Definition : us-gaap_ClassOfStockLineItems to evex_ClassOfWarrantsRedemptionPricePerUnit" xlink:type="arc" use="optional" order="8" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfWarrantOrRightOutstanding" xlink:label="us-gaap_ClassOfWarrantOrRightOutstanding" xlink:title="us-gaap_ClassOfWarrantOrRightOutstanding" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ClassOfStockLineItems" xlink:to="us-gaap_ClassOfWarrantOrRightOutstanding" xlink:title="Definition : us-gaap_ClassOfStockLineItems to us-gaap_ClassOfWarrantOrRightOutstanding" xlink:type="arc" use="optional" order="9" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_WarrantsSurrenderedAndCancelledNumber" xlink:label="evex_WarrantsSurrenderedAndCancelledNumber" xlink:title="evex_WarrantsSurrenderedAndCancelledNumber" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ClassOfStockLineItems" xlink:to="evex_WarrantsSurrenderedAndCancelledNumber" xlink:title="Definition : us-gaap_ClassOfStockLineItems to evex_WarrantsSurrenderedAndCancelledNumber" xlink:type="arc" use="optional" order="10" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_StockIssuedSharesExchangeForSurrenderAndCancellationOfWarrants" xlink:label="evex_StockIssuedSharesExchangeForSurrenderAndCancellationOfWarrants" xlink:title="evex_StockIssuedSharesExchangeForSurrenderAndCancellationOfWarrants" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ClassOfStockLineItems" xlink:to="evex_StockIssuedSharesExchangeForSurrenderAndCancellationOfWarrants" xlink:title="Definition : us-gaap_ClassOfStockLineItems to evex_StockIssuedSharesExchangeForSurrenderAndCancellationOfWarrants" xlink:type="arc" use="optional" order="11" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_NumberOfVertiports" xlink:label="evex_NumberOfVertiports" xlink:title="evex_NumberOfVertiports" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ClassOfStockLineItems" xlink:to="evex_NumberOfVertiports" xlink:title="Definition : us-gaap_ClassOfStockLineItems to evex_NumberOfVertiports" xlink:type="arc" use="optional" order="12" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_ClassOfWarrantOrRightVestedAndExercisable" xlink:label="evex_ClassOfWarrantOrRightVestedAndExercisable" xlink:title="evex_ClassOfWarrantOrRightVestedAndExercisable" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ClassOfStockLineItems" xlink:to="evex_ClassOfWarrantOrRightVestedAndExercisable" xlink:title="Definition : us-gaap_ClassOfStockLineItems to evex_ClassOfWarrantOrRightVestedAndExercisable" xlink:type="arc" use="optional" order="13" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfWarrantOrRightTable" xlink:label="us-gaap_ClassOfWarrantOrRightTable" xlink:title="us-gaap_ClassOfWarrantOrRightTable" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="us-gaap_ClassOfStockLineItems" xlink:to="us-gaap_ClassOfWarrantOrRightTable" xlink:title="Definition : us-gaap_ClassOfStockLineItems to us-gaap_ClassOfWarrantOrRightTable" xlink:type="arc" use="optional" order="14" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfWarrantOrRightAxis" xlink:label="us-gaap_ClassOfWarrantOrRightAxis" xlink:title="us-gaap_ClassOfWarrantOrRightAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ClassOfWarrantOrRightTable" xlink:to="us-gaap_ClassOfWarrantOrRightAxis" xlink:title="Definition : us-gaap_ClassOfWarrantOrRightTable to us-gaap_ClassOfWarrantOrRightAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfWarrantOrRightDomain" xlink:label="us-gaap_ClassOfWarrantOrRightDomain" xlink:title="us-gaap_ClassOfWarrantOrRightDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_ClassOfWarrantOrRightAxis" xlink:to="us-gaap_ClassOfWarrantOrRightDomain" xlink:title="Definition : us-gaap_ClassOfWarrantOrRightAxis to us-gaap_ClassOfWarrantOrRightDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_StrategicWarrantsMember" xlink:label="evex_StrategicWarrantsMember" xlink:title="evex_StrategicWarrantsMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ClassOfWarrantOrRightDomain" xlink:to="evex_StrategicWarrantsMember" xlink:title="Definition : us-gaap_ClassOfWarrantOrRightDomain to evex_StrategicWarrantsMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_StrategicWarrantsOneMember" xlink:label="evex_StrategicWarrantsOneMember" xlink:title="evex_StrategicWarrantsOneMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ClassOfWarrantOrRightDomain" xlink:to="evex_StrategicWarrantsOneMember" xlink:title="Definition : us-gaap_ClassOfWarrantOrRightDomain to evex_StrategicWarrantsOneMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_StrategicWarrantsTwoMember" xlink:label="evex_StrategicWarrantsTwoMember" xlink:title="evex_StrategicWarrantsTwoMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ClassOfWarrantOrRightDomain" xlink:to="evex_StrategicWarrantsTwoMember" xlink:title="Definition : us-gaap_ClassOfWarrantOrRightDomain to evex_StrategicWarrantsTwoMember" xlink:type="arc" use="optional" order="2" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_StrategicWarrantsThreeMember" xlink:label="evex_StrategicWarrantsThreeMember" xlink:title="evex_StrategicWarrantsThreeMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ClassOfWarrantOrRightDomain" xlink:to="evex_StrategicWarrantsThreeMember" xlink:title="Definition : us-gaap_ClassOfWarrantOrRightDomain to evex_StrategicWarrantsThreeMember" xlink:type="arc" use="optional" order="3" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_PrivatePlacementWarrantMember" xlink:label="evex_PrivatePlacementWarrantMember" xlink:title="evex_PrivatePlacementWarrantMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ClassOfWarrantOrRightDomain" xlink:to="evex_PrivatePlacementWarrantMember" xlink:title="Definition : us-gaap_ClassOfWarrantOrRightDomain to evex_PrivatePlacementWarrantMember" xlink:type="arc" use="optional" order="4" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_PublicWarrantsMember" xlink:label="evex_PublicWarrantsMember" xlink:title="evex_PublicWarrantsMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ClassOfWarrantOrRightDomain" xlink:to="evex_PublicWarrantsMember" xlink:title="Definition : us-gaap_ClassOfWarrantOrRightDomain to evex_PublicWarrantsMember" xlink:type="arc" use="optional" order="5" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_WarrantMember" xlink:label="us-gaap_WarrantMember" xlink:title="us-gaap_WarrantMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ClassOfWarrantOrRightDomain" xlink:to="us-gaap_WarrantMember" xlink:title="Definition : us-gaap_ClassOfWarrantOrRightDomain to us-gaap_WarrantMember" xlink:type="arc" use="optional" order="6" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfWarrantOrRightDomain" xlink:label="us-gaap_ClassOfWarrantOrRightDomain_1" xlink:title="us-gaap_ClassOfWarrantOrRightDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_ClassOfWarrantOrRightAxis" xlink:to="us-gaap_ClassOfWarrantOrRightDomain_1" xlink:title="Definition : us-gaap_ClassOfWarrantOrRightAxis to us-gaap_ClassOfWarrantOrRightDomain" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubsidiarySaleOfStockAxis" xlink:label="us-gaap_SubsidiarySaleOfStockAxis" xlink:title="us-gaap_SubsidiarySaleOfStockAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ClassOfWarrantOrRightTable" xlink:to="us-gaap_SubsidiarySaleOfStockAxis" xlink:title="Definition : us-gaap_ClassOfWarrantOrRightTable to us-gaap_SubsidiarySaleOfStockAxis" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SaleOfStockNameOfTransactionDomain" xlink:label="us-gaap_SaleOfStockNameOfTransactionDomain" xlink:title="us-gaap_SaleOfStockNameOfTransactionDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_SubsidiarySaleOfStockAxis" xlink:to="us-gaap_SaleOfStockNameOfTransactionDomain" xlink:title="Definition : us-gaap_SubsidiarySaleOfStockAxis to us-gaap_SaleOfStockNameOfTransactionDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PrivatePlacementMember" xlink:label="us-gaap_PrivatePlacementMember" xlink:title="us-gaap_PrivatePlacementMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_SaleOfStockNameOfTransactionDomain" xlink:to="us-gaap_PrivatePlacementMember" xlink:title="Definition : us-gaap_SaleOfStockNameOfTransactionDomain to us-gaap_PrivatePlacementMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SaleOfStockNameOfTransactionDomain" xlink:label="us-gaap_SaleOfStockNameOfTransactionDomain_1" xlink:title="us-gaap_SaleOfStockNameOfTransactionDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_SubsidiarySaleOfStockAxis" xlink:to="us-gaap_SaleOfStockNameOfTransactionDomain_1" xlink:title="Definition : us-gaap_SubsidiarySaleOfStockAxis to us-gaap_SaleOfStockNameOfTransactionDomain" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementEquityComponentsAxis" xlink:label="us-gaap_StatementEquityComponentsAxis" xlink:title="us-gaap_StatementEquityComponentsAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ClassOfWarrantOrRightTable" xlink:to="us-gaap_StatementEquityComponentsAxis" xlink:title="Definition : us-gaap_ClassOfWarrantOrRightTable to us-gaap_StatementEquityComponentsAxis" xlink:type="arc" use="optional" order="2" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquityComponentDomain" xlink:label="us-gaap_EquityComponentDomain" xlink:title="us-gaap_EquityComponentDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_StatementEquityComponentsAxis" xlink:to="us-gaap_EquityComponentDomain" xlink:title="Definition : us-gaap_StatementEquityComponentsAxis to us-gaap_EquityComponentDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockMember" xlink:label="us-gaap_CommonStockMember" xlink:title="us-gaap_CommonStockMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EquityComponentDomain" xlink:to="us-gaap_CommonStockMember" xlink:title="Definition : us-gaap_EquityComponentDomain to us-gaap_CommonStockMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquityComponentDomain" xlink:label="us-gaap_EquityComponentDomain_1" xlink:title="us-gaap_EquityComponentDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_StatementEquityComponentsAxis" xlink:to="us-gaap_EquityComponentDomain_1" xlink:title="Definition : us-gaap_StatementEquityComponentsAxis to us-gaap_EquityComponentDomain" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_ClassOfStrategicWarrantsAxis" xlink:label="evex_ClassOfStrategicWarrantsAxis" xlink:title="evex_ClassOfStrategicWarrantsAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ClassOfWarrantOrRightTable" xlink:to="evex_ClassOfStrategicWarrantsAxis" xlink:title="Definition : us-gaap_ClassOfWarrantOrRightTable to evex_ClassOfStrategicWarrantsAxis" xlink:type="arc" use="optional" order="3" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_ClassOfStrategicWarrantsDomain" xlink:label="evex_ClassOfStrategicWarrantsDomain" xlink:title="evex_ClassOfStrategicWarrantsDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="evex_ClassOfStrategicWarrantsAxis" xlink:to="evex_ClassOfStrategicWarrantsDomain" xlink:title="Definition : evex_ClassOfStrategicWarrantsAxis to evex_ClassOfStrategicWarrantsDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_StrategicMarketWarrantsMember" xlink:label="evex_StrategicMarketWarrantsMember" xlink:title="evex_StrategicMarketWarrantsMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="evex_ClassOfStrategicWarrantsDomain" xlink:to="evex_StrategicMarketWarrantsMember" xlink:title="Definition : evex_ClassOfStrategicWarrantsDomain to evex_StrategicMarketWarrantsMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_StrategicPennyWarrantsMember" xlink:label="evex_StrategicPennyWarrantsMember" xlink:title="evex_StrategicPennyWarrantsMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="evex_ClassOfStrategicWarrantsDomain" xlink:to="evex_StrategicPennyWarrantsMember" xlink:title="Definition : evex_ClassOfStrategicWarrantsDomain to evex_StrategicPennyWarrantsMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_ClassOfStrategicWarrantsDomain" xlink:label="evex_ClassOfStrategicWarrantsDomain_1" xlink:title="evex_ClassOfStrategicWarrantsDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="evex_ClassOfStrategicWarrantsAxis" xlink:to="evex_ClassOfStrategicWarrantsDomain_1" xlink:title="Definition : evex_ClassOfStrategicWarrantsAxis to evex_ClassOfStrategicWarrantsDomain" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:title="dei_LegalEntityAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ClassOfWarrantOrRightTable" xlink:to="dei_LegalEntityAxis" xlink:title="Definition : us-gaap_ClassOfWarrantOrRightTable to dei_LegalEntityAxis" xlink:type="arc" use="optional" order="4" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:title="dei_EntityDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:title="Definition : dei_LegalEntityAxis to dei_EntityDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_UnitedAirlinesVenturesLtdMember" xlink:label="evex_UnitedAirlinesVenturesLtdMember" xlink:title="evex_UnitedAirlinesVenturesLtdMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_EntityDomain" xlink:to="evex_UnitedAirlinesVenturesLtdMember" xlink:title="Definition : dei_EntityDomain to evex_UnitedAirlinesVenturesLtdMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain_1" xlink:title="dei_EntityDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain_1" xlink:title="Definition : dei_LegalEntityAxis to dei_EntityDomain" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_AgreementAxis" xlink:label="evex_AgreementAxis" xlink:title="evex_AgreementAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ClassOfWarrantOrRightTable" xlink:to="evex_AgreementAxis" xlink:title="Definition : us-gaap_ClassOfWarrantOrRightTable to evex_AgreementAxis" xlink:type="arc" use="optional" order="5" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_AgreementDomain" xlink:label="evex_AgreementDomain" xlink:title="evex_AgreementDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="evex_AgreementAxis" xlink:to="evex_AgreementDomain" xlink:title="Definition : evex_AgreementAxis to evex_AgreementDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_UnitedSubscriptionAgreementMember" xlink:label="evex_UnitedSubscriptionAgreementMember" xlink:title="evex_UnitedSubscriptionAgreementMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="evex_AgreementDomain" xlink:to="evex_UnitedSubscriptionAgreementMember" xlink:title="Definition : evex_AgreementDomain to evex_UnitedSubscriptionAgreementMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_ConditionalPurchaseAgreementMember" xlink:label="evex_ConditionalPurchaseAgreementMember" xlink:title="evex_ConditionalPurchaseAgreementMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="evex_AgreementDomain" xlink:to="evex_ConditionalPurchaseAgreementMember" xlink:title="Definition : evex_AgreementDomain to evex_ConditionalPurchaseAgreementMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_BindingAgreementMember" xlink:label="evex_BindingAgreementMember" xlink:title="evex_BindingAgreementMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="evex_AgreementDomain" xlink:to="evex_BindingAgreementMember" xlink:title="Definition : evex_AgreementDomain to evex_BindingAgreementMember" xlink:type="arc" use="optional" order="2" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_AgreementDomain" xlink:label="evex_AgreementDomain_1" xlink:title="evex_AgreementDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="evex_AgreementAxis" xlink:to="evex_AgreementDomain_1" xlink:title="Definition : evex_AgreementAxis to evex_AgreementDomain" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeAxis" xlink:label="srt_RangeAxis" xlink:title="srt_RangeAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ClassOfWarrantOrRightTable" xlink:to="srt_RangeAxis" xlink:title="Definition : us-gaap_ClassOfWarrantOrRightTable to srt_RangeAxis" xlink:type="arc" use="optional" order="6" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeMember" xlink:label="srt_RangeMember" xlink:title="srt_RangeMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="srt_RangeAxis" xlink:to="srt_RangeMember" xlink:title="Definition : srt_RangeAxis to srt_RangeMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_MaximumMember" xlink:label="srt_MaximumMember" xlink:title="srt_MaximumMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_RangeMember" xlink:to="srt_MaximumMember" xlink:title="Definition : srt_RangeMember to srt_MaximumMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeMember" xlink:label="srt_RangeMember_1" xlink:title="srt_RangeMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="srt_RangeAxis" xlink:to="srt_RangeMember_1" xlink:title="Definition : srt_RangeAxis to srt_RangeMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
  </link:definitionLink>
  <link:definitionLink xlink:type="extended" xlink:role="http://eveairmobility.com/role/WarrantLiabilityDetailsTextuals">
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeInstrumentsGainLossLineItems" xlink:label="us-gaap_DerivativeInstrumentsGainLossLineItems" xlink:title="us-gaap_DerivativeInstrumentsGainLossLineItems" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GainLossOnDerivativeInstrumentsNetPretax" xlink:label="us-gaap_GainLossOnDerivativeInstrumentsNetPretax" xlink:title="us-gaap_GainLossOnDerivativeInstrumentsNetPretax" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DerivativeInstrumentsGainLossLineItems" xlink:to="us-gaap_GainLossOnDerivativeInstrumentsNetPretax" xlink:title="Definition : us-gaap_DerivativeInstrumentsGainLossLineItems to us-gaap_GainLossOnDerivativeInstrumentsNetPretax" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
  </link:definitionLink>
  <link:definitionLink xlink:type="extended" xlink:role="http://eveairmobility.com/role/FairValueMeasurementsDetails">
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems" xlink:label="us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems" xlink:title="us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeLiabilities" xlink:label="us-gaap_DerivativeLiabilities" xlink:title="us-gaap_DerivativeLiabilities" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems" xlink:to="us-gaap_DerivativeLiabilities" xlink:title="Definition : us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems to us-gaap_DerivativeLiabilities" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentFairValue" xlink:label="us-gaap_DebtInstrumentFairValue" xlink:title="us-gaap_DebtInstrumentFairValue" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems" xlink:to="us-gaap_DebtInstrumentFairValue" xlink:title="Definition : us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems to us-gaap_DebtInstrumentFairValue" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeLiabilityStatementOfFinancialPositionExtensibleEnumeration" xlink:label="us-gaap_DerivativeLiabilityStatementOfFinancialPositionExtensibleEnumeration" xlink:title="us-gaap_DerivativeLiabilityStatementOfFinancialPositionExtensibleEnumeration" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems" xlink:to="us-gaap_DerivativeLiabilityStatementOfFinancialPositionExtensibleEnumeration" xlink:title="Definition : us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems to us-gaap_DerivativeLiabilityStatementOfFinancialPositionExtensibleEnumeration" xlink:type="arc" use="optional" order="2" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueByBalanceSheetGroupingTable" xlink:label="us-gaap_FairValueByBalanceSheetGroupingTable" xlink:title="us-gaap_FairValueByBalanceSheetGroupingTable" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems" xlink:to="us-gaap_FairValueByBalanceSheetGroupingTable" xlink:title="Definition : us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems to us-gaap_FairValueByBalanceSheetGroupingTable" xlink:type="arc" use="optional" order="3" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueByMeasurementFrequencyAxis" xlink:label="us-gaap_FairValueByMeasurementFrequencyAxis" xlink:title="us-gaap_FairValueByMeasurementFrequencyAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_FairValueByBalanceSheetGroupingTable" xlink:to="us-gaap_FairValueByMeasurementFrequencyAxis" xlink:title="Definition : us-gaap_FairValueByBalanceSheetGroupingTable to us-gaap_FairValueByMeasurementFrequencyAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementFrequencyDomain" xlink:label="us-gaap_FairValueMeasurementFrequencyDomain" xlink:title="us-gaap_FairValueMeasurementFrequencyDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_FairValueByMeasurementFrequencyAxis" xlink:to="us-gaap_FairValueMeasurementFrequencyDomain" xlink:title="Definition : us-gaap_FairValueByMeasurementFrequencyAxis to us-gaap_FairValueMeasurementFrequencyDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementsRecurringMember" xlink:label="us-gaap_FairValueMeasurementsRecurringMember" xlink:title="us-gaap_FairValueMeasurementsRecurringMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_FairValueMeasurementFrequencyDomain" xlink:to="us-gaap_FairValueMeasurementsRecurringMember" xlink:title="Definition : us-gaap_FairValueMeasurementFrequencyDomain to us-gaap_FairValueMeasurementsRecurringMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementFrequencyDomain" xlink:label="us-gaap_FairValueMeasurementFrequencyDomain_1" xlink:title="us-gaap_FairValueMeasurementFrequencyDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_FairValueByMeasurementFrequencyAxis" xlink:to="us-gaap_FairValueMeasurementFrequencyDomain_1" xlink:title="Definition : us-gaap_FairValueByMeasurementFrequencyAxis to us-gaap_FairValueMeasurementFrequencyDomain" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis" xlink:label="us-gaap_FairValueByFairValueHierarchyLevelAxis" xlink:title="us-gaap_FairValueByFairValueHierarchyLevelAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_FairValueByBalanceSheetGroupingTable" xlink:to="us-gaap_FairValueByFairValueHierarchyLevelAxis" xlink:title="Definition : us-gaap_FairValueByBalanceSheetGroupingTable to us-gaap_FairValueByFairValueHierarchyLevelAxis" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:label="us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:title="us-gaap_FairValueMeasurementsFairValueHierarchyDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_FairValueByFairValueHierarchyLevelAxis" xlink:to="us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:title="Definition : us-gaap_FairValueByFairValueHierarchyLevelAxis to us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueInputsLevel1Member" xlink:label="us-gaap_FairValueInputsLevel1Member" xlink:title="us-gaap_FairValueInputsLevel1Member" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:to="us-gaap_FairValueInputsLevel1Member" xlink:title="Definition : us-gaap_FairValueMeasurementsFairValueHierarchyDomain to us-gaap_FairValueInputsLevel1Member" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueInputsLevel2Member" xlink:label="us-gaap_FairValueInputsLevel2Member" xlink:title="us-gaap_FairValueInputsLevel2Member" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:to="us-gaap_FairValueInputsLevel2Member" xlink:title="Definition : us-gaap_FairValueMeasurementsFairValueHierarchyDomain to us-gaap_FairValueInputsLevel2Member" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueInputsLevel3Member" xlink:label="us-gaap_FairValueInputsLevel3Member" xlink:title="us-gaap_FairValueInputsLevel3Member" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:to="us-gaap_FairValueInputsLevel3Member" xlink:title="Definition : us-gaap_FairValueMeasurementsFairValueHierarchyDomain to us-gaap_FairValueInputsLevel3Member" xlink:type="arc" use="optional" order="2" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:label="us-gaap_FairValueMeasurementsFairValueHierarchyDomain_1" xlink:title="us-gaap_FairValueMeasurementsFairValueHierarchyDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_FairValueByFairValueHierarchyLevelAxis" xlink:to="us-gaap_FairValueMeasurementsFairValueHierarchyDomain_1" xlink:title="Definition : us-gaap_FairValueByFairValueHierarchyLevelAxis to us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueByMeasurementBasisAxis" xlink:label="us-gaap_FairValueByMeasurementBasisAxis" xlink:title="us-gaap_FairValueByMeasurementBasisAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_FairValueByBalanceSheetGroupingTable" xlink:to="us-gaap_FairValueByMeasurementBasisAxis" xlink:title="Definition : us-gaap_FairValueByBalanceSheetGroupingTable to us-gaap_FairValueByMeasurementBasisAxis" xlink:type="arc" use="optional" order="2" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PortionAtFairValueFairValueDisclosureMember" xlink:label="us-gaap_PortionAtFairValueFairValueDisclosureMember" xlink:title="us-gaap_PortionAtFairValueFairValueDisclosureMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_FairValueByMeasurementBasisAxis" xlink:to="us-gaap_PortionAtFairValueFairValueDisclosureMember" xlink:title="Definition : us-gaap_FairValueByMeasurementBasisAxis to us-gaap_PortionAtFairValueFairValueDisclosureMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CarryingReportedAmountFairValueDisclosureMember" xlink:label="us-gaap_CarryingReportedAmountFairValueDisclosureMember" xlink:title="us-gaap_CarryingReportedAmountFairValueDisclosureMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_PortionAtFairValueFairValueDisclosureMember" xlink:to="us-gaap_CarryingReportedAmountFairValueDisclosureMember" xlink:title="Definition : us-gaap_PortionAtFairValueFairValueDisclosureMember to us-gaap_CarryingReportedAmountFairValueDisclosureMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PortionAtFairValueFairValueDisclosureMember" xlink:label="us-gaap_PortionAtFairValueFairValueDisclosureMember_1" xlink:title="us-gaap_PortionAtFairValueFairValueDisclosureMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_FairValueByMeasurementBasisAxis" xlink:to="us-gaap_PortionAtFairValueFairValueDisclosureMember_1" xlink:title="Definition : us-gaap_FairValueByMeasurementBasisAxis to us-gaap_PortionAtFairValueFairValueDisclosureMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
  </link:definitionLink>
  <link:definitionLink xlink:type="extended" xlink:role="http://eveairmobility.com/role/FairValueMeasurementsDetails1Textuals">
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems" xlink:label="us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems" xlink:title="us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_IncreaseDecreaseThroughReclassificationOfPublicWarrantsFromLiabilityToEquity" xlink:label="evex_IncreaseDecreaseThroughReclassificationOfPublicWarrantsFromLiabilityToEquity" xlink:title="evex_IncreaseDecreaseThroughReclassificationOfPublicWarrantsFromLiabilityToEquity" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems" xlink:to="evex_IncreaseDecreaseThroughReclassificationOfPublicWarrantsFromLiabilityToEquity" xlink:title="Definition : us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems to evex_IncreaseDecreaseThroughReclassificationOfPublicWarrantsFromLiabilityToEquity" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueByBalanceSheetGroupingTable" xlink:label="us-gaap_FairValueByBalanceSheetGroupingTable" xlink:title="us-gaap_FairValueByBalanceSheetGroupingTable" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems" xlink:to="us-gaap_FairValueByBalanceSheetGroupingTable" xlink:title="Definition : us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems to us-gaap_FairValueByBalanceSheetGroupingTable" xlink:type="arc" use="optional" order="1" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfWarrantOrRightAxis" xlink:label="us-gaap_ClassOfWarrantOrRightAxis" xlink:title="us-gaap_ClassOfWarrantOrRightAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_FairValueByBalanceSheetGroupingTable" xlink:to="us-gaap_ClassOfWarrantOrRightAxis" xlink:title="Definition : us-gaap_FairValueByBalanceSheetGroupingTable to us-gaap_ClassOfWarrantOrRightAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfWarrantOrRightDomain" xlink:label="us-gaap_ClassOfWarrantOrRightDomain" xlink:title="us-gaap_ClassOfWarrantOrRightDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_ClassOfWarrantOrRightAxis" xlink:to="us-gaap_ClassOfWarrantOrRightDomain" xlink:title="Definition : us-gaap_ClassOfWarrantOrRightAxis to us-gaap_ClassOfWarrantOrRightDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_PublicWarrantsMember" xlink:label="evex_PublicWarrantsMember" xlink:title="evex_PublicWarrantsMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ClassOfWarrantOrRightDomain" xlink:to="evex_PublicWarrantsMember" xlink:title="Definition : us-gaap_ClassOfWarrantOrRightDomain to evex_PublicWarrantsMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfWarrantOrRightDomain" xlink:label="us-gaap_ClassOfWarrantOrRightDomain_1" xlink:title="us-gaap_ClassOfWarrantOrRightDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_ClassOfWarrantOrRightAxis" xlink:to="us-gaap_ClassOfWarrantOrRightDomain_1" xlink:title="Definition : us-gaap_ClassOfWarrantOrRightAxis to us-gaap_ClassOfWarrantOrRightDomain" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementEquityComponentsAxis" xlink:label="us-gaap_StatementEquityComponentsAxis" xlink:title="us-gaap_StatementEquityComponentsAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_FairValueByBalanceSheetGroupingTable" xlink:to="us-gaap_StatementEquityComponentsAxis" xlink:title="Definition : us-gaap_FairValueByBalanceSheetGroupingTable to us-gaap_StatementEquityComponentsAxis" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquityComponentDomain" xlink:label="us-gaap_EquityComponentDomain" xlink:title="us-gaap_EquityComponentDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_StatementEquityComponentsAxis" xlink:to="us-gaap_EquityComponentDomain" xlink:title="Definition : us-gaap_StatementEquityComponentsAxis to us-gaap_EquityComponentDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockMember" xlink:label="us-gaap_CommonStockMember" xlink:title="us-gaap_CommonStockMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EquityComponentDomain" xlink:to="us-gaap_CommonStockMember" xlink:title="Definition : us-gaap_EquityComponentDomain to us-gaap_CommonStockMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquityComponentDomain" xlink:label="us-gaap_EquityComponentDomain_1" xlink:title="us-gaap_EquityComponentDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_StatementEquityComponentsAxis" xlink:to="us-gaap_EquityComponentDomain_1" xlink:title="Definition : us-gaap_StatementEquityComponentsAxis to us-gaap_EquityComponentDomain" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
  </link:definitionLink>
  <link:definitionLink xlink:type="extended" xlink:role="http://eveairmobility.com/role/ShareBasedCompensationScheduleofrestrictedstockunitsawardactivitiesDetails">
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:title="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward" xlink:title="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward" xlink:title="Definition : us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems to us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber" xlink:title="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber" xlink:title="Definition : us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward to us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod" xlink:title="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod" xlink:title="Definition : us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward to us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod" xlink:title="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod" xlink:title="Definition : us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward to us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod" xlink:type="arc" use="optional" order="2" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod" xlink:title="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod" xlink:title="Definition : us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward to us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod" xlink:type="arc" use="optional" order="3" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue" xlink:title="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue" xlink:title="Definition : us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward to us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue" xlink:type="arc" use="optional" order="4" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue" xlink:title="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue" xlink:title="Definition : us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward to us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue" xlink:type="arc" use="optional" order="5" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue" xlink:title="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue" xlink:title="Definition : us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward to us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue" xlink:type="arc" use="optional" order="6" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue" xlink:title="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue" xlink:title="Definition : us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward to us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue" xlink:type="arc" use="optional" order="7" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsOutstandingWeightedAverageRemainingContractualTerms" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsOutstandingWeightedAverageRemainingContractualTerms" xlink:title="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsOutstandingWeightedAverageRemainingContractualTerms" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsOutstandingWeightedAverageRemainingContractualTerms" xlink:title="Definition : us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward to us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsOutstandingWeightedAverageRemainingContractualTerms" xlink:type="arc" use="optional" order="8" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:label="us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:title="us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:to="us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:title="Definition : us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems to us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:type="arc" use="optional" order="1" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PlanNameAxis" xlink:label="us-gaap_PlanNameAxis" xlink:title="us-gaap_PlanNameAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:to="us-gaap_PlanNameAxis" xlink:title="Definition : us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable to us-gaap_PlanNameAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PlanNameDomain" xlink:label="us-gaap_PlanNameDomain" xlink:title="us-gaap_PlanNameDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_PlanNameAxis" xlink:to="us-gaap_PlanNameDomain" xlink:title="Definition : us-gaap_PlanNameAxis to us-gaap_PlanNameDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_StockIncentivePlan2022Member" xlink:label="evex_StockIncentivePlan2022Member" xlink:title="evex_StockIncentivePlan2022Member" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_PlanNameDomain" xlink:to="evex_StockIncentivePlan2022Member" xlink:title="Definition : us-gaap_PlanNameDomain to evex_StockIncentivePlan2022Member" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PlanNameDomain" xlink:label="us-gaap_PlanNameDomain_1" xlink:title="us-gaap_PlanNameDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_PlanNameAxis" xlink:to="us-gaap_PlanNameDomain_1" xlink:title="Definition : us-gaap_PlanNameAxis to us-gaap_PlanNameDomain" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AwardTypeAxis" xlink:label="us-gaap_AwardTypeAxis" xlink:title="us-gaap_AwardTypeAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:to="us-gaap_AwardTypeAxis" xlink:title="Definition : us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable to us-gaap_AwardTypeAxis" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:label="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:title="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_AwardTypeAxis" xlink:to="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:title="Definition : us-gaap_AwardTypeAxis to us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestrictedStockUnitsRSUMember" xlink:label="us-gaap_RestrictedStockUnitsRSUMember" xlink:title="us-gaap_RestrictedStockUnitsRSUMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:to="us-gaap_RestrictedStockUnitsRSUMember" xlink:title="Definition : us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain to us-gaap_RestrictedStockUnitsRSUMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:label="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_1" xlink:title="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_AwardTypeAxis" xlink:to="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_1" xlink:title="Definition : us-gaap_AwardTypeAxis to us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_ConditionTypeAxis" xlink:label="evex_ConditionTypeAxis" xlink:title="evex_ConditionTypeAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:to="evex_ConditionTypeAxis" xlink:title="Definition : us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable to evex_ConditionTypeAxis" xlink:type="arc" use="optional" order="2" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_ConditionTypeDomain" xlink:label="evex_ConditionTypeDomain" xlink:title="evex_ConditionTypeDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="evex_ConditionTypeAxis" xlink:to="evex_ConditionTypeDomain" xlink:title="Definition : evex_ConditionTypeAxis to evex_ConditionTypeDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_ServiceConditionsMember" xlink:label="evex_ServiceConditionsMember" xlink:title="evex_ServiceConditionsMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="evex_ConditionTypeDomain" xlink:to="evex_ServiceConditionsMember" xlink:title="Definition : evex_ConditionTypeDomain to evex_ServiceConditionsMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_MarketConditionsMember" xlink:label="evex_MarketConditionsMember" xlink:title="evex_MarketConditionsMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="evex_ConditionTypeDomain" xlink:to="evex_MarketConditionsMember" xlink:title="Definition : evex_ConditionTypeDomain to evex_MarketConditionsMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_ConditionTypeDomain" xlink:label="evex_ConditionTypeDomain_1" xlink:title="evex_ConditionTypeDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="evex_ConditionTypeAxis" xlink:to="evex_ConditionTypeDomain_1" xlink:title="Definition : evex_ConditionTypeAxis to evex_ConditionTypeDomain" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
  </link:definitionLink>
  <link:definitionLink xlink:type="extended" xlink:role="http://eveairmobility.com/role/ShareBasedCompensationDetailsTextuals">
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:title="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardPercentageOfOutstandingStockMaximum" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardPercentageOfOutstandingStockMaximum" xlink:title="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardPercentageOfOutstandingStockMaximum" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardPercentageOfOutstandingStockMaximum" xlink:title="Definition : us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems to us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardPercentageOfOutstandingStockMaximum" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockCapitalSharesReservedForFutureIssuance" xlink:label="us-gaap_CommonStockCapitalSharesReservedForFutureIssuance" xlink:title="us-gaap_CommonStockCapitalSharesReservedForFutureIssuance" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:to="us-gaap_CommonStockCapitalSharesReservedForFutureIssuance" xlink:title="Definition : us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems to us-gaap_CommonStockCapitalSharesReservedForFutureIssuance" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1" xlink:title="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1" xlink:title="Definition : us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems to us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1" xlink:type="arc" use="optional" order="2" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue" xlink:title="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue" xlink:title="Definition : us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems to us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue" xlink:type="arc" use="optional" order="3" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate" xlink:title="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate" xlink:title="Definition : us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems to us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate" xlink:type="arc" use="optional" order="4" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate" xlink:title="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate" xlink:title="Definition : us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems to us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate" xlink:type="arc" use="optional" order="5" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1" xlink:title="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:to="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1" xlink:title="Definition : us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems to us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1" xlink:type="arc" use="optional" order="6" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage" xlink:title="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:to="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage" xlink:title="Definition : us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems to us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage" xlink:type="arc" use="optional" order="7" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardPlanModificationNumberOfEmployeesAffected" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardPlanModificationNumberOfEmployeesAffected" xlink:title="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardPlanModificationNumberOfEmployeesAffected" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardPlanModificationNumberOfEmployeesAffected" xlink:title="Definition : us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems to us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardPlanModificationNumberOfEmployeesAffected" xlink:type="arc" use="optional" order="8" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardRequisiteServicePeriod1" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardRequisiteServicePeriod1" xlink:title="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardRequisiteServicePeriod1" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardRequisiteServicePeriod1" xlink:title="Definition : us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems to us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardRequisiteServicePeriod1" xlink:type="arc" use="optional" order="9" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardPlanModificationIncrementalCompensationCost" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardPlanModificationIncrementalCompensationCost" xlink:title="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardPlanModificationIncrementalCompensationCost" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardPlanModificationIncrementalCompensationCost" xlink:title="Definition : us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems to us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardPlanModificationIncrementalCompensationCost" xlink:type="arc" use="optional" order="10" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod" xlink:title="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod" xlink:title="Definition : us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems to us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod" xlink:type="arc" use="optional" order="11" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized" xlink:label="us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized" xlink:title="us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:to="us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized" xlink:title="Definition : us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems to us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized" xlink:type="arc" use="optional" order="12" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1" xlink:label="us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1" xlink:title="us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:to="us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1" xlink:title="Definition : us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems to us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1" xlink:type="arc" use="optional" order="13" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:label="us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:title="us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:to="us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:title="Definition : us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems to us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:type="arc" use="optional" order="14" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PlanNameAxis" xlink:label="us-gaap_PlanNameAxis" xlink:title="us-gaap_PlanNameAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:to="us-gaap_PlanNameAxis" xlink:title="Definition : us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable to us-gaap_PlanNameAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PlanNameDomain" xlink:label="us-gaap_PlanNameDomain" xlink:title="us-gaap_PlanNameDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_PlanNameAxis" xlink:to="us-gaap_PlanNameDomain" xlink:title="Definition : us-gaap_PlanNameAxis to us-gaap_PlanNameDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_StockIncentivePlan2022Member" xlink:label="evex_StockIncentivePlan2022Member" xlink:title="evex_StockIncentivePlan2022Member" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_PlanNameDomain" xlink:to="evex_StockIncentivePlan2022Member" xlink:title="Definition : us-gaap_PlanNameDomain to evex_StockIncentivePlan2022Member" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PlanNameDomain" xlink:label="us-gaap_PlanNameDomain_1" xlink:title="us-gaap_PlanNameDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_PlanNameAxis" xlink:to="us-gaap_PlanNameDomain_1" xlink:title="Definition : us-gaap_PlanNameAxis to us-gaap_PlanNameDomain" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AwardTypeAxis" xlink:label="us-gaap_AwardTypeAxis" xlink:title="us-gaap_AwardTypeAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:to="us-gaap_AwardTypeAxis" xlink:title="Definition : us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable to us-gaap_AwardTypeAxis" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:label="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:title="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_AwardTypeAxis" xlink:to="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:title="Definition : us-gaap_AwardTypeAxis to us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestrictedStockUnitsRSUMember" xlink:label="us-gaap_RestrictedStockUnitsRSUMember" xlink:title="us-gaap_RestrictedStockUnitsRSUMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:to="us-gaap_RestrictedStockUnitsRSUMember" xlink:title="Definition : us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain to us-gaap_RestrictedStockUnitsRSUMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:label="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_1" xlink:title="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_AwardTypeAxis" xlink:to="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_1" xlink:title="Definition : us-gaap_AwardTypeAxis to us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_ConditionTypeAxis" xlink:label="evex_ConditionTypeAxis" xlink:title="evex_ConditionTypeAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:to="evex_ConditionTypeAxis" xlink:title="Definition : us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable to evex_ConditionTypeAxis" xlink:type="arc" use="optional" order="2" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_ConditionTypeDomain" xlink:label="evex_ConditionTypeDomain" xlink:title="evex_ConditionTypeDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="evex_ConditionTypeAxis" xlink:to="evex_ConditionTypeDomain" xlink:title="Definition : evex_ConditionTypeAxis to evex_ConditionTypeDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_ServiceConditionsMember" xlink:label="evex_ServiceConditionsMember" xlink:title="evex_ServiceConditionsMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="evex_ConditionTypeDomain" xlink:to="evex_ServiceConditionsMember" xlink:title="Definition : evex_ConditionTypeDomain to evex_ServiceConditionsMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_MarketConditionsMember" xlink:label="evex_MarketConditionsMember" xlink:title="evex_MarketConditionsMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="evex_ConditionTypeDomain" xlink:to="evex_MarketConditionsMember" xlink:title="Definition : evex_ConditionTypeDomain to evex_MarketConditionsMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_ConditionTypeDomain" xlink:label="evex_ConditionTypeDomain_1" xlink:title="evex_ConditionTypeDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="evex_ConditionTypeAxis" xlink:to="evex_ConditionTypeDomain_1" xlink:title="Definition : evex_ConditionTypeAxis to evex_ConditionTypeDomain" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GranteeStatusAxis" xlink:label="us-gaap_GranteeStatusAxis" xlink:title="us-gaap_GranteeStatusAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:to="us-gaap_GranteeStatusAxis" xlink:title="Definition : us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable to us-gaap_GranteeStatusAxis" xlink:type="arc" use="optional" order="3" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GranteeStatusDomain" xlink:label="us-gaap_GranteeStatusDomain" xlink:title="us-gaap_GranteeStatusDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_GranteeStatusAxis" xlink:to="us-gaap_GranteeStatusDomain" xlink:title="Definition : us-gaap_GranteeStatusAxis to us-gaap_GranteeStatusDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_DirectorMember" xlink:label="srt_DirectorMember" xlink:title="srt_DirectorMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_GranteeStatusDomain" xlink:to="srt_DirectorMember" xlink:title="Definition : us-gaap_GranteeStatusDomain to srt_DirectorMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedPaymentArrangementEmployeeMember" xlink:label="us-gaap_ShareBasedPaymentArrangementEmployeeMember" xlink:title="us-gaap_ShareBasedPaymentArrangementEmployeeMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_GranteeStatusDomain" xlink:to="us-gaap_ShareBasedPaymentArrangementEmployeeMember" xlink:title="Definition : us-gaap_GranteeStatusDomain to us-gaap_ShareBasedPaymentArrangementEmployeeMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GranteeStatusDomain" xlink:label="us-gaap_GranteeStatusDomain_1" xlink:title="us-gaap_GranteeStatusDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_GranteeStatusAxis" xlink:to="us-gaap_GranteeStatusDomain_1" xlink:title="Definition : us-gaap_GranteeStatusAxis to us-gaap_GranteeStatusDomain" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeAxis" xlink:label="srt_RangeAxis" xlink:title="srt_RangeAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:to="srt_RangeAxis" xlink:title="Definition : us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable to srt_RangeAxis" xlink:type="arc" use="optional" order="4" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeMember" xlink:label="srt_RangeMember" xlink:title="srt_RangeMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="srt_RangeAxis" xlink:to="srt_RangeMember" xlink:title="Definition : srt_RangeAxis to srt_RangeMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_MinimumMember" xlink:label="srt_MinimumMember" xlink:title="srt_MinimumMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_RangeMember" xlink:to="srt_MinimumMember" xlink:title="Definition : srt_RangeMember to srt_MinimumMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_MaximumMember" xlink:label="srt_MaximumMember" xlink:title="srt_MaximumMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_RangeMember" xlink:to="srt_MaximumMember" xlink:title="Definition : srt_RangeMember to srt_MaximumMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeMember" xlink:label="srt_RangeMember_1" xlink:title="srt_RangeMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="srt_RangeAxis" xlink:to="srt_RangeMember_1" xlink:title="Definition : srt_RangeAxis to srt_RangeMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
  </link:definitionLink>
  <link:definitionLink xlink:type="extended" xlink:role="http://eveairmobility.com/role/EarningsPerShareDetails1">
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems" xlink:label="us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems" xlink:title="us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount" xlink:label="us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount" xlink:title="us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems" xlink:to="us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount" xlink:title="Definition : us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems to us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable" xlink:label="us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable" xlink:title="us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems" xlink:to="us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable" xlink:title="Definition : us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems to us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable" xlink:type="arc" use="optional" order="1" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis" xlink:label="us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis" xlink:title="us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable" xlink:to="us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis" xlink:title="Definition : us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable to us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AntidilutiveSecuritiesNameDomain" xlink:label="us-gaap_AntidilutiveSecuritiesNameDomain" xlink:title="us-gaap_AntidilutiveSecuritiesNameDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis" xlink:to="us-gaap_AntidilutiveSecuritiesNameDomain" xlink:title="Definition : us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis to us-gaap_AntidilutiveSecuritiesNameDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_UnvestedRestrictedStockUnitsRSUMember" xlink:label="evex_UnvestedRestrictedStockUnitsRSUMember" xlink:title="evex_UnvestedRestrictedStockUnitsRSUMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_AntidilutiveSecuritiesNameDomain" xlink:to="evex_UnvestedRestrictedStockUnitsRSUMember" xlink:title="Definition : us-gaap_AntidilutiveSecuritiesNameDomain to evex_UnvestedRestrictedStockUnitsRSUMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_PennyWarrantsMember" xlink:label="evex_PennyWarrantsMember" xlink:title="evex_PennyWarrantsMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_AntidilutiveSecuritiesNameDomain" xlink:to="evex_PennyWarrantsMember" xlink:title="Definition : us-gaap_AntidilutiveSecuritiesNameDomain to evex_PennyWarrantsMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_WarrantMember" xlink:label="us-gaap_WarrantMember" xlink:title="us-gaap_WarrantMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_AntidilutiveSecuritiesNameDomain" xlink:to="us-gaap_WarrantMember" xlink:title="Definition : us-gaap_AntidilutiveSecuritiesNameDomain to us-gaap_WarrantMember" xlink:type="arc" use="optional" order="2" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AntidilutiveSecuritiesNameDomain" xlink:label="us-gaap_AntidilutiveSecuritiesNameDomain_1" xlink:title="us-gaap_AntidilutiveSecuritiesNameDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis" xlink:to="us-gaap_AntidilutiveSecuritiesNameDomain_1" xlink:title="Definition : us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis to us-gaap_AntidilutiveSecuritiesNameDomain" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
  </link:definitionLink>
  <link:definitionLink xlink:type="extended" xlink:role="http://eveairmobility.com/role/LeasesDetails1">
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LesseeLeaseDescriptionLineItems" xlink:label="us-gaap_LesseeLeaseDescriptionLineItems" xlink:title="us-gaap_LesseeLeaseDescriptionLineItems" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingLeaseCost" xlink:label="us-gaap_OperatingLeaseCost" xlink:title="us-gaap_OperatingLeaseCost" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_LesseeLeaseDescriptionLineItems" xlink:to="us-gaap_OperatingLeaseCost" xlink:title="Definition : us-gaap_LesseeLeaseDescriptionLineItems to us-gaap_OperatingLeaseCost" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LesseeOperatingLeaseDescriptionAbstract" xlink:label="us-gaap_LesseeOperatingLeaseDescriptionAbstract" xlink:title="us-gaap_LesseeOperatingLeaseDescriptionAbstract" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_LesseeLeaseDescriptionLineItems" xlink:to="us-gaap_LesseeOperatingLeaseDescriptionAbstract" xlink:title="Definition : us-gaap_LesseeLeaseDescriptionLineItems to us-gaap_LesseeOperatingLeaseDescriptionAbstract" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashFlowOperatingActivitiesLesseeAbstract" xlink:label="us-gaap_CashFlowOperatingActivitiesLesseeAbstract" xlink:title="us-gaap_CashFlowOperatingActivitiesLesseeAbstract" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_LesseeOperatingLeaseDescriptionAbstract" xlink:to="us-gaap_CashFlowOperatingActivitiesLesseeAbstract" xlink:title="Definition : us-gaap_LesseeOperatingLeaseDescriptionAbstract to us-gaap_CashFlowOperatingActivitiesLesseeAbstract" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingLeasePayments" xlink:label="us-gaap_OperatingLeasePayments" xlink:title="us-gaap_OperatingLeasePayments" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_CashFlowOperatingActivitiesLesseeAbstract" xlink:to="us-gaap_OperatingLeasePayments" xlink:title="Definition : us-gaap_CashFlowOperatingActivitiesLesseeAbstract to us-gaap_OperatingLeasePayments" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LeaseCostAbstract" xlink:label="us-gaap_LeaseCostAbstract" xlink:title="us-gaap_LeaseCostAbstract" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_LesseeOperatingLeaseDescriptionAbstract" xlink:to="us-gaap_LeaseCostAbstract" xlink:title="Definition : us-gaap_LesseeOperatingLeaseDescriptionAbstract to us-gaap_LeaseCostAbstract" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability" xlink:label="us-gaap_RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability" xlink:title="us-gaap_RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_LeaseCostAbstract" xlink:to="us-gaap_RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability" xlink:title="Definition : us-gaap_LeaseCostAbstract to us-gaap_RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingLeaseWeightedAverageRemainingLeaseTerm1" xlink:label="us-gaap_OperatingLeaseWeightedAverageRemainingLeaseTerm1" xlink:title="us-gaap_OperatingLeaseWeightedAverageRemainingLeaseTerm1" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_LesseeOperatingLeaseDescriptionAbstract" xlink:to="us-gaap_OperatingLeaseWeightedAverageRemainingLeaseTerm1" xlink:title="Definition : us-gaap_LesseeOperatingLeaseDescriptionAbstract to us-gaap_OperatingLeaseWeightedAverageRemainingLeaseTerm1" xlink:type="arc" use="optional" order="2" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent" xlink:label="us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent" xlink:title="us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_LesseeOperatingLeaseDescriptionAbstract" xlink:to="us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent" xlink:title="Definition : us-gaap_LesseeOperatingLeaseDescriptionAbstract to us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent" xlink:type="arc" use="optional" order="3" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LesseeLeaseDescriptionTable" xlink:label="us-gaap_LesseeLeaseDescriptionTable" xlink:title="us-gaap_LesseeLeaseDescriptionTable" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="us-gaap_LesseeLeaseDescriptionLineItems" xlink:to="us-gaap_LesseeLeaseDescriptionTable" xlink:title="Definition : us-gaap_LesseeLeaseDescriptionLineItems to us-gaap_LesseeLeaseDescriptionTable" xlink:type="arc" use="optional" order="2" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:label="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:title="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_LesseeLeaseDescriptionTable" xlink:to="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:title="Definition : us-gaap_LesseeLeaseDescriptionTable to us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain" xlink:label="us-gaap_RelatedPartyDomain" xlink:title="us-gaap_RelatedPartyDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:to="us-gaap_RelatedPartyDomain" xlink:title="Definition : us-gaap_RelatedPartyTransactionsByRelatedPartyAxis to us-gaap_RelatedPartyDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyMember" xlink:label="us-gaap_RelatedPartyMember" xlink:title="us-gaap_RelatedPartyMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyDomain" xlink:to="us-gaap_RelatedPartyMember" xlink:title="Definition : us-gaap_RelatedPartyDomain to us-gaap_RelatedPartyMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NonrelatedPartyMember" xlink:label="us-gaap_NonrelatedPartyMember" xlink:title="us-gaap_NonrelatedPartyMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyDomain" xlink:to="us-gaap_NonrelatedPartyMember" xlink:title="Definition : us-gaap_RelatedPartyDomain to us-gaap_NonrelatedPartyMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain" xlink:label="us-gaap_RelatedPartyDomain_1" xlink:title="us-gaap_RelatedPartyDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:to="us-gaap_RelatedPartyDomain_1" xlink:title="Definition : us-gaap_RelatedPartyTransactionsByRelatedPartyAxis to us-gaap_RelatedPartyDomain" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
  </link:definitionLink>
  <link:definitionLink xlink:type="extended" xlink:role="http://eveairmobility.com/role/SegmentsDetails">
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentReportingReconcilingItemForOperatingProfitLossFromSegmentToConsolidatedLineItems" xlink:label="us-gaap_SegmentReportingReconcilingItemForOperatingProfitLossFromSegmentToConsolidatedLineItems" xlink:title="us-gaap_SegmentReportingReconcilingItemForOperatingProfitLossFromSegmentToConsolidatedLineItems" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ResearchAndDevelopmentExpense" xlink:label="us-gaap_ResearchAndDevelopmentExpense" xlink:title="us-gaap_ResearchAndDevelopmentExpense" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_SegmentReportingReconcilingItemForOperatingProfitLossFromSegmentToConsolidatedLineItems" xlink:to="us-gaap_ResearchAndDevelopmentExpense" xlink:title="Definition : us-gaap_SegmentReportingReconcilingItemForOperatingProfitLossFromSegmentToConsolidatedLineItems to us-gaap_ResearchAndDevelopmentExpense" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_SegmentReportingOperatingIncomeLossRelatedToResearchAndDevelopmentExpenses" xlink:label="evex_SegmentReportingOperatingIncomeLossRelatedToResearchAndDevelopmentExpenses" xlink:title="evex_SegmentReportingOperatingIncomeLossRelatedToResearchAndDevelopmentExpenses" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_SegmentReportingReconcilingItemForOperatingProfitLossFromSegmentToConsolidatedLineItems" xlink:to="evex_SegmentReportingOperatingIncomeLossRelatedToResearchAndDevelopmentExpenses" xlink:title="Definition : us-gaap_SegmentReportingReconcilingItemForOperatingProfitLossFromSegmentToConsolidatedLineItems to evex_SegmentReportingOperatingIncomeLossRelatedToResearchAndDevelopmentExpenses" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_OtherOperatingAndNonoperatingIncomeExpenseNet" xlink:label="evex_OtherOperatingAndNonoperatingIncomeExpenseNet" xlink:title="evex_OtherOperatingAndNonoperatingIncomeExpenseNet" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_SegmentReportingReconcilingItemForOperatingProfitLossFromSegmentToConsolidatedLineItems" xlink:to="evex_OtherOperatingAndNonoperatingIncomeExpenseNet" xlink:title="Definition : us-gaap_SegmentReportingReconcilingItemForOperatingProfitLossFromSegmentToConsolidatedLineItems to evex_OtherOperatingAndNonoperatingIncomeExpenseNet" xlink:type="arc" use="optional" order="2" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest" xlink:label="us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest" xlink:title="us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_SegmentReportingReconcilingItemForOperatingProfitLossFromSegmentToConsolidatedLineItems" xlink:to="us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest" xlink:title="Definition : us-gaap_SegmentReportingReconcilingItemForOperatingProfitLossFromSegmentToConsolidatedLineItems to us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest" xlink:type="arc" use="optional" order="3" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ReconciliationOfOperatingProfitLossFromSegmentsToConsolidatedTable" xlink:label="us-gaap_ReconciliationOfOperatingProfitLossFromSegmentsToConsolidatedTable" xlink:title="us-gaap_ReconciliationOfOperatingProfitLossFromSegmentsToConsolidatedTable" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="us-gaap_SegmentReportingReconcilingItemForOperatingProfitLossFromSegmentToConsolidatedLineItems" xlink:to="us-gaap_ReconciliationOfOperatingProfitLossFromSegmentsToConsolidatedTable" xlink:title="Definition : us-gaap_SegmentReportingReconcilingItemForOperatingProfitLossFromSegmentToConsolidatedLineItems to us-gaap_ReconciliationOfOperatingProfitLossFromSegmentsToConsolidatedTable" xlink:type="arc" use="optional" order="4" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementBusinessSegmentsAxis" xlink:label="us-gaap_StatementBusinessSegmentsAxis" xlink:title="us-gaap_StatementBusinessSegmentsAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ReconciliationOfOperatingProfitLossFromSegmentsToConsolidatedTable" xlink:to="us-gaap_StatementBusinessSegmentsAxis" xlink:title="Definition : us-gaap_ReconciliationOfOperatingProfitLossFromSegmentsToConsolidatedTable to us-gaap_StatementBusinessSegmentsAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentDomain" xlink:label="us-gaap_SegmentDomain" xlink:title="us-gaap_SegmentDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_StatementBusinessSegmentsAxis" xlink:to="us-gaap_SegmentDomain" xlink:title="Definition : us-gaap_StatementBusinessSegmentsAxis to us-gaap_SegmentDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_EvtolMember" xlink:label="evex_EvtolMember" xlink:title="evex_EvtolMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_SegmentDomain" xlink:to="evex_EvtolMember" xlink:title="Definition : us-gaap_SegmentDomain to evex_EvtolMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_ServiceSupportMember" xlink:label="evex_ServiceSupportMember" xlink:title="evex_ServiceSupportMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_SegmentDomain" xlink:to="evex_ServiceSupportMember" xlink:title="Definition : us-gaap_SegmentDomain to evex_ServiceSupportMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_UatmMember" xlink:label="evex_UatmMember" xlink:title="evex_UatmMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_SegmentDomain" xlink:to="evex_UatmMember" xlink:title="Definition : us-gaap_SegmentDomain to evex_UatmMember" xlink:type="arc" use="optional" order="2" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentDomain" xlink:label="us-gaap_SegmentDomain_1" xlink:title="us-gaap_SegmentDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_StatementBusinessSegmentsAxis" xlink:to="us-gaap_SegmentDomain_1" xlink:title="Definition : us-gaap_StatementBusinessSegmentsAxis to us-gaap_SegmentDomain" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidationItemsAxis" xlink:label="srt_ConsolidationItemsAxis" xlink:title="srt_ConsolidationItemsAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ReconciliationOfOperatingProfitLossFromSegmentsToConsolidatedTable" xlink:to="srt_ConsolidationItemsAxis" xlink:title="Definition : us-gaap_ReconciliationOfOperatingProfitLossFromSegmentsToConsolidatedTable to srt_ConsolidationItemsAxis" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidationItemsDomain" xlink:label="srt_ConsolidationItemsDomain" xlink:title="srt_ConsolidationItemsDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="srt_ConsolidationItemsAxis" xlink:to="srt_ConsolidationItemsDomain" xlink:title="Definition : srt_ConsolidationItemsAxis to srt_ConsolidationItemsDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CorporateNonSegmentMember" xlink:label="us-gaap_CorporateNonSegmentMember" xlink:title="us-gaap_CorporateNonSegmentMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_ConsolidationItemsDomain" xlink:to="us-gaap_CorporateNonSegmentMember" xlink:title="Definition : srt_ConsolidationItemsDomain to us-gaap_CorporateNonSegmentMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidationItemsDomain" xlink:label="srt_ConsolidationItemsDomain_1" xlink:title="srt_ConsolidationItemsDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="srt_ConsolidationItemsAxis" xlink:to="srt_ConsolidationItemsDomain_1" xlink:title="Definition : srt_ConsolidationItemsAxis to srt_ConsolidationItemsDomain" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
  </link:definitionLink>
  <link:definitionLink xlink:type="extended" xlink:role="http://eveairmobility.com/role/FairvaluemeasurementDetails3Textuals">
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueOptionQuantitativeDisclosuresLineItems" xlink:label="us-gaap_FairValueOptionQuantitativeDisclosuresLineItems" xlink:title="us-gaap_FairValueOptionQuantitativeDisclosuresLineItems" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_ExpectedDividendAsPercentageSharesGranted" xlink:label="evex_ExpectedDividendAsPercentageSharesGranted" xlink:title="evex_ExpectedDividendAsPercentageSharesGranted" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_FairValueOptionQuantitativeDisclosuresLineItems" xlink:to="evex_ExpectedDividendAsPercentageSharesGranted" xlink:title="Definition : us-gaap_FairValueOptionQuantitativeDisclosuresLineItems to evex_ExpectedDividendAsPercentageSharesGranted" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueOptionQuantitativeDisclosuresTable" xlink:label="us-gaap_FairValueOptionQuantitativeDisclosuresTable" xlink:title="us-gaap_FairValueOptionQuantitativeDisclosuresTable" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="us-gaap_FairValueOptionQuantitativeDisclosuresLineItems" xlink:to="us-gaap_FairValueOptionQuantitativeDisclosuresTable" xlink:title="Definition : us-gaap_FairValueOptionQuantitativeDisclosuresLineItems to us-gaap_FairValueOptionQuantitativeDisclosuresTable" xlink:type="arc" use="optional" order="1" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfWarrantOrRightAxis" xlink:label="us-gaap_ClassOfWarrantOrRightAxis" xlink:title="us-gaap_ClassOfWarrantOrRightAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_FairValueOptionQuantitativeDisclosuresTable" xlink:to="us-gaap_ClassOfWarrantOrRightAxis" xlink:title="Definition : us-gaap_FairValueOptionQuantitativeDisclosuresTable to us-gaap_ClassOfWarrantOrRightAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfWarrantOrRightDomain" xlink:label="us-gaap_ClassOfWarrantOrRightDomain" xlink:title="us-gaap_ClassOfWarrantOrRightDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_ClassOfWarrantOrRightAxis" xlink:to="us-gaap_ClassOfWarrantOrRightDomain" xlink:title="Definition : us-gaap_ClassOfWarrantOrRightAxis to us-gaap_ClassOfWarrantOrRightDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_PrivatePlacementWarrantMember" xlink:label="evex_PrivatePlacementWarrantMember" xlink:title="evex_PrivatePlacementWarrantMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ClassOfWarrantOrRightDomain" xlink:to="evex_PrivatePlacementWarrantMember" xlink:title="Definition : us-gaap_ClassOfWarrantOrRightDomain to evex_PrivatePlacementWarrantMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_StrategicWarrantsThreeMember" xlink:label="evex_StrategicWarrantsThreeMember" xlink:title="evex_StrategicWarrantsThreeMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="evex_PrivatePlacementWarrantMember" xlink:to="evex_StrategicWarrantsThreeMember" xlink:title="Definition : evex_PrivatePlacementWarrantMember to evex_StrategicWarrantsThreeMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfWarrantOrRightDomain" xlink:label="us-gaap_ClassOfWarrantOrRightDomain_1" xlink:title="us-gaap_ClassOfWarrantOrRightDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_ClassOfWarrantOrRightAxis" xlink:to="us-gaap_ClassOfWarrantOrRightDomain_1" xlink:title="Definition : us-gaap_ClassOfWarrantOrRightAxis to us-gaap_ClassOfWarrantOrRightDomain" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_ClassOfStrategicWarrantsAxis" xlink:label="evex_ClassOfStrategicWarrantsAxis" xlink:title="evex_ClassOfStrategicWarrantsAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_FairValueOptionQuantitativeDisclosuresTable" xlink:to="evex_ClassOfStrategicWarrantsAxis" xlink:title="Definition : us-gaap_FairValueOptionQuantitativeDisclosuresTable to evex_ClassOfStrategicWarrantsAxis" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_ClassOfStrategicWarrantsDomain" xlink:label="evex_ClassOfStrategicWarrantsDomain" xlink:title="evex_ClassOfStrategicWarrantsDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="evex_ClassOfStrategicWarrantsAxis" xlink:to="evex_ClassOfStrategicWarrantsDomain" xlink:title="Definition : evex_ClassOfStrategicWarrantsAxis to evex_ClassOfStrategicWarrantsDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_StrategicMarketWarrantsMember" xlink:label="evex_StrategicMarketWarrantsMember" xlink:title="evex_StrategicMarketWarrantsMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="evex_ClassOfStrategicWarrantsDomain" xlink:to="evex_StrategicMarketWarrantsMember" xlink:title="Definition : evex_ClassOfStrategicWarrantsDomain to evex_StrategicMarketWarrantsMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_ClassOfStrategicWarrantsDomain" xlink:label="evex_ClassOfStrategicWarrantsDomain_1" xlink:title="evex_ClassOfStrategicWarrantsDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="evex_ClassOfStrategicWarrantsAxis" xlink:to="evex_ClassOfStrategicWarrantsDomain_1" xlink:title="Definition : evex_ClassOfStrategicWarrantsAxis to evex_ClassOfStrategicWarrantsDomain" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
  </link:definitionLink>
  <link:definitionLink xlink:type="extended" xlink:role="http://eveairmobility.com/role/ResearchandDevelopmentExpensesDetails1Textuals">
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_ResearchAndDevelopmentLineItems" xlink:label="evex_ResearchAndDevelopmentLineItems" xlink:title="evex_ResearchAndDevelopmentLineItems" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CostOfRevenue" xlink:label="us-gaap_CostOfRevenue" xlink:title="us-gaap_CostOfRevenue" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="evex_ResearchAndDevelopmentLineItems" xlink:to="us-gaap_CostOfRevenue" xlink:title="Definition : evex_ResearchAndDevelopmentLineItems to us-gaap_CostOfRevenue" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_ResearchAndDevelopmentTable" xlink:label="evex_ResearchAndDevelopmentTable" xlink:title="evex_ResearchAndDevelopmentTable" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="evex_ResearchAndDevelopmentLineItems" xlink:to="evex_ResearchAndDevelopmentTable" xlink:title="Definition : evex_ResearchAndDevelopmentLineItems to evex_ResearchAndDevelopmentTable" xlink:type="arc" use="optional" order="1" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeStatementLocationAxis" xlink:label="us-gaap_IncomeStatementLocationAxis" xlink:title="us-gaap_IncomeStatementLocationAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="evex_ResearchAndDevelopmentTable" xlink:to="us-gaap_IncomeStatementLocationAxis" xlink:title="Definition : evex_ResearchAndDevelopmentTable to us-gaap_IncomeStatementLocationAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeStatementLocationDomain" xlink:label="us-gaap_IncomeStatementLocationDomain" xlink:title="us-gaap_IncomeStatementLocationDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_IncomeStatementLocationAxis" xlink:to="us-gaap_IncomeStatementLocationDomain" xlink:title="Definition : us-gaap_IncomeStatementLocationAxis to us-gaap_IncomeStatementLocationDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ResearchAndDevelopmentExpenseMember" xlink:label="us-gaap_ResearchAndDevelopmentExpenseMember" xlink:title="us-gaap_ResearchAndDevelopmentExpenseMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_IncomeStatementLocationDomain" xlink:to="us-gaap_ResearchAndDevelopmentExpenseMember" xlink:title="Definition : us-gaap_IncomeStatementLocationDomain to us-gaap_ResearchAndDevelopmentExpenseMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeStatementLocationDomain" xlink:label="us-gaap_IncomeStatementLocationDomain_1" xlink:title="us-gaap_IncomeStatementLocationDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_IncomeStatementLocationAxis" xlink:to="us-gaap_IncomeStatementLocationDomain_1" xlink:title="Definition : us-gaap_IncomeStatementLocationAxis to us-gaap_IncomeStatementLocationDomain" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionAxis" xlink:label="us-gaap_RelatedPartyTransactionAxis" xlink:title="us-gaap_RelatedPartyTransactionAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="evex_ResearchAndDevelopmentTable" xlink:to="us-gaap_RelatedPartyTransactionAxis" xlink:title="Definition : evex_ResearchAndDevelopmentTable to us-gaap_RelatedPartyTransactionAxis" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionDomain" xlink:label="us-gaap_RelatedPartyTransactionDomain" xlink:title="us-gaap_RelatedPartyTransactionDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_RelatedPartyTransactionAxis" xlink:to="us-gaap_RelatedPartyTransactionDomain" xlink:title="Definition : us-gaap_RelatedPartyTransactionAxis to us-gaap_RelatedPartyTransactionDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_MasterServiceAgreementMember" xlink:label="evex_MasterServiceAgreementMember" xlink:title="evex_MasterServiceAgreementMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyTransactionDomain" xlink:to="evex_MasterServiceAgreementMember" xlink:title="Definition : us-gaap_RelatedPartyTransactionDomain to evex_MasterServiceAgreementMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionDomain" xlink:label="us-gaap_RelatedPartyTransactionDomain_1" xlink:title="us-gaap_RelatedPartyTransactionDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_RelatedPartyTransactionAxis" xlink:to="us-gaap_RelatedPartyTransactionDomain_1" xlink:title="Definition : us-gaap_RelatedPartyTransactionAxis to us-gaap_RelatedPartyTransactionDomain" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidatedEntitiesAxis" xlink:label="srt_ConsolidatedEntitiesAxis" xlink:title="srt_ConsolidatedEntitiesAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="evex_ResearchAndDevelopmentTable" xlink:to="srt_ConsolidatedEntitiesAxis" xlink:title="Definition : evex_ResearchAndDevelopmentTable to srt_ConsolidatedEntitiesAxis" xlink:type="arc" use="optional" order="2" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidatedEntitiesDomain" xlink:label="srt_ConsolidatedEntitiesDomain" xlink:title="srt_ConsolidatedEntitiesDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="srt_ConsolidatedEntitiesAxis" xlink:to="srt_ConsolidatedEntitiesDomain" xlink:title="Definition : srt_ConsolidatedEntitiesAxis to srt_ConsolidatedEntitiesDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ParentCompanyMember" xlink:label="srt_ParentCompanyMember" xlink:title="srt_ParentCompanyMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_ConsolidatedEntitiesDomain" xlink:to="srt_ParentCompanyMember" xlink:title="Definition : srt_ConsolidatedEntitiesDomain to srt_ParentCompanyMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidatedEntitiesDomain" xlink:label="srt_ConsolidatedEntitiesDomain_1" xlink:title="srt_ConsolidatedEntitiesDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="srt_ConsolidatedEntitiesAxis" xlink:to="srt_ConsolidatedEntitiesDomain_1" xlink:title="Definition : srt_ConsolidatedEntitiesAxis to srt_ConsolidatedEntitiesDomain" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:label="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:title="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="evex_ResearchAndDevelopmentTable" xlink:to="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:title="Definition : evex_ResearchAndDevelopmentTable to us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:type="arc" use="optional" order="3" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain" xlink:label="us-gaap_RelatedPartyDomain" xlink:title="us-gaap_RelatedPartyDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:to="us-gaap_RelatedPartyDomain" xlink:title="Definition : us-gaap_RelatedPartyTransactionsByRelatedPartyAxis to us-gaap_RelatedPartyDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyMember" xlink:label="us-gaap_RelatedPartyMember" xlink:title="us-gaap_RelatedPartyMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyDomain" xlink:to="us-gaap_RelatedPartyMember" xlink:title="Definition : us-gaap_RelatedPartyDomain to us-gaap_RelatedPartyMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain" xlink:label="us-gaap_RelatedPartyDomain_1" xlink:title="us-gaap_RelatedPartyDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:to="us-gaap_RelatedPartyDomain_1" xlink:title="Definition : us-gaap_RelatedPartyTransactionsByRelatedPartyAxis to us-gaap_RelatedPartyDomain" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
  </link:definitionLink>
  <link:definitionLink xlink:type="extended" xlink:role="http://eveairmobility.com/role/EquityDetails">
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_ScheduleOfCommonStockReservedForFutureIssuanceLineItems" xlink:label="evex_ScheduleOfCommonStockReservedForFutureIssuanceLineItems" xlink:title="evex_ScheduleOfCommonStockReservedForFutureIssuanceLineItems" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockCapitalSharesReservedForFutureIssuance" xlink:label="us-gaap_CommonStockCapitalSharesReservedForFutureIssuance" xlink:title="us-gaap_CommonStockCapitalSharesReservedForFutureIssuance" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="evex_ScheduleOfCommonStockReservedForFutureIssuanceLineItems" xlink:to="us-gaap_CommonStockCapitalSharesReservedForFutureIssuance" xlink:title="Definition : evex_ScheduleOfCommonStockReservedForFutureIssuanceLineItems to us-gaap_CommonStockCapitalSharesReservedForFutureIssuance" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_ScheduleOfCommonStockReservedForFutureIssuanceTable" xlink:label="evex_ScheduleOfCommonStockReservedForFutureIssuanceTable" xlink:title="evex_ScheduleOfCommonStockReservedForFutureIssuanceTable" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="evex_ScheduleOfCommonStockReservedForFutureIssuanceLineItems" xlink:to="evex_ScheduleOfCommonStockReservedForFutureIssuanceTable" xlink:title="Definition : evex_ScheduleOfCommonStockReservedForFutureIssuanceLineItems to evex_ScheduleOfCommonStockReservedForFutureIssuanceTable" xlink:type="arc" use="optional" order="1" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_CommonStockReservedForFutureIssuanceAxis" xlink:label="evex_CommonStockReservedForFutureIssuanceAxis" xlink:title="evex_CommonStockReservedForFutureIssuanceAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="evex_ScheduleOfCommonStockReservedForFutureIssuanceTable" xlink:to="evex_CommonStockReservedForFutureIssuanceAxis" xlink:title="Definition : evex_ScheduleOfCommonStockReservedForFutureIssuanceTable to evex_CommonStockReservedForFutureIssuanceAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_CommonStockReservedForFutureIssuanceDomain" xlink:label="evex_CommonStockReservedForFutureIssuanceDomain" xlink:title="evex_CommonStockReservedForFutureIssuanceDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="evex_CommonStockReservedForFutureIssuanceAxis" xlink:to="evex_CommonStockReservedForFutureIssuanceDomain" xlink:title="Definition : evex_CommonStockReservedForFutureIssuanceAxis to evex_CommonStockReservedForFutureIssuanceDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_StockIncentivePlan2022Member" xlink:label="evex_StockIncentivePlan2022Member" xlink:title="evex_StockIncentivePlan2022Member" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="evex_CommonStockReservedForFutureIssuanceDomain" xlink:to="evex_StockIncentivePlan2022Member" xlink:title="Definition : evex_CommonStockReservedForFutureIssuanceDomain to evex_StockIncentivePlan2022Member" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_PrivatePlacementWarrantMember" xlink:label="evex_PrivatePlacementWarrantMember" xlink:title="evex_PrivatePlacementWarrantMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="evex_CommonStockReservedForFutureIssuanceDomain" xlink:to="evex_PrivatePlacementWarrantMember" xlink:title="Definition : evex_CommonStockReservedForFutureIssuanceDomain to evex_PrivatePlacementWarrantMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_PublicWarrantsMember" xlink:label="evex_PublicWarrantsMember" xlink:title="evex_PublicWarrantsMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="evex_CommonStockReservedForFutureIssuanceDomain" xlink:to="evex_PublicWarrantsMember" xlink:title="Definition : evex_CommonStockReservedForFutureIssuanceDomain to evex_PublicWarrantsMember" xlink:type="arc" use="optional" order="2" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_StrategicWarrantsMember" xlink:label="evex_StrategicWarrantsMember" xlink:title="evex_StrategicWarrantsMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="evex_CommonStockReservedForFutureIssuanceDomain" xlink:to="evex_StrategicWarrantsMember" xlink:title="Definition : evex_CommonStockReservedForFutureIssuanceDomain to evex_StrategicWarrantsMember" xlink:type="arc" use="optional" order="3" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_CommonStockReservedForFutureIssuanceDomain" xlink:label="evex_CommonStockReservedForFutureIssuanceDomain_1" xlink:title="evex_CommonStockReservedForFutureIssuanceDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="evex_CommonStockReservedForFutureIssuanceAxis" xlink:to="evex_CommonStockReservedForFutureIssuanceDomain_1" xlink:title="Definition : evex_CommonStockReservedForFutureIssuanceAxis to evex_CommonStockReservedForFutureIssuanceDomain" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
  </link:definitionLink>
  <link:definitionLink xlink:type="extended" xlink:role="http://eveairmobility.com/role/SellingDetails">
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_SellingExpenseLineItems" xlink:label="evex_SellingExpenseLineItems" xlink:title="evex_SellingExpenseLineItems" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_OutsourcedServiceExpense" xlink:label="evex_OutsourcedServiceExpense" xlink:title="evex_OutsourcedServiceExpense" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="evex_SellingExpenseLineItems" xlink:to="evex_OutsourcedServiceExpense" xlink:title="Definition : evex_SellingExpenseLineItems to evex_OutsourcedServiceExpense" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LaborAndRelatedExpense" xlink:label="us-gaap_LaborAndRelatedExpense" xlink:title="us-gaap_LaborAndRelatedExpense" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="evex_SellingExpenseLineItems" xlink:to="us-gaap_LaborAndRelatedExpense" xlink:title="Definition : evex_SellingExpenseLineItems to us-gaap_LaborAndRelatedExpense" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherGeneralAndAdministrativeExpense" xlink:label="us-gaap_OtherGeneralAndAdministrativeExpense" xlink:title="us-gaap_OtherGeneralAndAdministrativeExpense" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="evex_SellingExpenseLineItems" xlink:to="us-gaap_OtherGeneralAndAdministrativeExpense" xlink:title="Definition : evex_SellingExpenseLineItems to us-gaap_OtherGeneralAndAdministrativeExpense" xlink:type="arc" use="optional" order="2" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SellingAndMarketingExpense" xlink:label="us-gaap_SellingAndMarketingExpense" xlink:title="us-gaap_SellingAndMarketingExpense" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="evex_SellingExpenseLineItems" xlink:to="us-gaap_SellingAndMarketingExpense" xlink:title="Definition : evex_SellingExpenseLineItems to us-gaap_SellingAndMarketingExpense" xlink:type="arc" use="optional" order="3" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_ScheduleOfSellingExpenseTable" xlink:label="evex_ScheduleOfSellingExpenseTable" xlink:title="evex_ScheduleOfSellingExpenseTable" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="evex_SellingExpenseLineItems" xlink:to="evex_ScheduleOfSellingExpenseTable" xlink:title="Definition : evex_SellingExpenseLineItems to evex_ScheduleOfSellingExpenseTable" xlink:type="arc" use="optional" order="4" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeStatementLocationAxis" xlink:label="us-gaap_IncomeStatementLocationAxis" xlink:title="us-gaap_IncomeStatementLocationAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="evex_ScheduleOfSellingExpenseTable" xlink:to="us-gaap_IncomeStatementLocationAxis" xlink:title="Definition : evex_ScheduleOfSellingExpenseTable to us-gaap_IncomeStatementLocationAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeStatementLocationDomain" xlink:label="us-gaap_IncomeStatementLocationDomain" xlink:title="us-gaap_IncomeStatementLocationDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_IncomeStatementLocationAxis" xlink:to="us-gaap_IncomeStatementLocationDomain" xlink:title="Definition : us-gaap_IncomeStatementLocationAxis to us-gaap_IncomeStatementLocationDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SellingAndMarketingExpenseMember" xlink:label="us-gaap_SellingAndMarketingExpenseMember" xlink:title="us-gaap_SellingAndMarketingExpenseMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_IncomeStatementLocationDomain" xlink:to="us-gaap_SellingAndMarketingExpenseMember" xlink:title="Definition : us-gaap_IncomeStatementLocationDomain to us-gaap_SellingAndMarketingExpenseMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeStatementLocationDomain" xlink:label="us-gaap_IncomeStatementLocationDomain_1" xlink:title="us-gaap_IncomeStatementLocationDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_IncomeStatementLocationAxis" xlink:to="us-gaap_IncomeStatementLocationDomain_1" xlink:title="Definition : us-gaap_IncomeStatementLocationAxis to us-gaap_IncomeStatementLocationDomain" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
  </link:definitionLink>
  <link:definitionLink xlink:type="extended" xlink:role="http://eveairmobility.com/role/WarrantliabilitiesDetailsTextuals">
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfWarrantOrRightLineItems" xlink:label="us-gaap_ClassOfWarrantOrRightLineItems" xlink:title="us-gaap_ClassOfWarrantOrRightLineItems" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_ClassOfWarrantOrRightThresholdPeriodForExerciseFromDateOfClosingPublicOffering" xlink:label="evex_ClassOfWarrantOrRightThresholdPeriodForExerciseFromDateOfClosingPublicOffering" xlink:title="evex_ClassOfWarrantOrRightThresholdPeriodForExerciseFromDateOfClosingPublicOffering" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ClassOfWarrantOrRightLineItems" xlink:to="evex_ClassOfWarrantOrRightThresholdPeriodForExerciseFromDateOfClosingPublicOffering" xlink:title="Definition : us-gaap_ClassOfWarrantOrRightLineItems to evex_ClassOfWarrantOrRightThresholdPeriodForExerciseFromDateOfClosingPublicOffering" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_ClassOfWarrantOrRightThresholdPeriodForSendNoticeOfRedemption" xlink:label="evex_ClassOfWarrantOrRightThresholdPeriodForSendNoticeOfRedemption" xlink:title="evex_ClassOfWarrantOrRightThresholdPeriodForSendNoticeOfRedemption" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ClassOfWarrantOrRightLineItems" xlink:to="evex_ClassOfWarrantOrRightThresholdPeriodForSendNoticeOfRedemption" xlink:title="Definition : us-gaap_ClassOfWarrantOrRightLineItems to evex_ClassOfWarrantOrRightThresholdPeriodForSendNoticeOfRedemption" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfWarrantOrRightTable" xlink:label="us-gaap_ClassOfWarrantOrRightTable" xlink:title="us-gaap_ClassOfWarrantOrRightTable" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="us-gaap_ClassOfWarrantOrRightLineItems" xlink:to="us-gaap_ClassOfWarrantOrRightTable" xlink:title="Definition : us-gaap_ClassOfWarrantOrRightLineItems to us-gaap_ClassOfWarrantOrRightTable" xlink:type="arc" use="optional" order="2" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfWarrantOrRightAxis" xlink:label="us-gaap_ClassOfWarrantOrRightAxis" xlink:title="us-gaap_ClassOfWarrantOrRightAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ClassOfWarrantOrRightTable" xlink:to="us-gaap_ClassOfWarrantOrRightAxis" xlink:title="Definition : us-gaap_ClassOfWarrantOrRightTable to us-gaap_ClassOfWarrantOrRightAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfWarrantOrRightDomain" xlink:label="us-gaap_ClassOfWarrantOrRightDomain" xlink:title="us-gaap_ClassOfWarrantOrRightDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_ClassOfWarrantOrRightAxis" xlink:to="us-gaap_ClassOfWarrantOrRightDomain" xlink:title="Definition : us-gaap_ClassOfWarrantOrRightAxis to us-gaap_ClassOfWarrantOrRightDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_PublicWarrantsMember" xlink:label="evex_PublicWarrantsMember" xlink:title="evex_PublicWarrantsMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ClassOfWarrantOrRightDomain" xlink:to="evex_PublicWarrantsMember" xlink:title="Definition : us-gaap_ClassOfWarrantOrRightDomain to evex_PublicWarrantsMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_PrivatePlacementWarrantMember" xlink:label="evex_PrivatePlacementWarrantMember" xlink:title="evex_PrivatePlacementWarrantMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ClassOfWarrantOrRightDomain" xlink:to="evex_PrivatePlacementWarrantMember" xlink:title="Definition : us-gaap_ClassOfWarrantOrRightDomain to evex_PrivatePlacementWarrantMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfWarrantOrRightDomain" xlink:label="us-gaap_ClassOfWarrantOrRightDomain_1" xlink:title="us-gaap_ClassOfWarrantOrRightDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_ClassOfWarrantOrRightAxis" xlink:to="us-gaap_ClassOfWarrantOrRightDomain_1" xlink:title="Definition : us-gaap_ClassOfWarrantOrRightAxis to us-gaap_ClassOfWarrantOrRightDomain" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:label="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:title="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ClassOfWarrantOrRightTable" xlink:to="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:title="Definition : us-gaap_ClassOfWarrantOrRightTable to us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain" xlink:label="us-gaap_RelatedPartyDomain" xlink:title="us-gaap_RelatedPartyDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:to="us-gaap_RelatedPartyDomain" xlink:title="Definition : us-gaap_RelatedPartyTransactionsByRelatedPartyAxis to us-gaap_RelatedPartyDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_ZaniteAcquisitionCorpMember" xlink:label="evex_ZaniteAcquisitionCorpMember" xlink:title="evex_ZaniteAcquisitionCorpMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyDomain" xlink:to="evex_ZaniteAcquisitionCorpMember" xlink:title="Definition : us-gaap_RelatedPartyDomain to evex_ZaniteAcquisitionCorpMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain" xlink:label="us-gaap_RelatedPartyDomain_1" xlink:title="us-gaap_RelatedPartyDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:to="us-gaap_RelatedPartyDomain_1" xlink:title="Definition : us-gaap_RelatedPartyTransactionsByRelatedPartyAxis to us-gaap_RelatedPartyDomain" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementEquityComponentsAxis" xlink:label="us-gaap_StatementEquityComponentsAxis" xlink:title="us-gaap_StatementEquityComponentsAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ClassOfWarrantOrRightTable" xlink:to="us-gaap_StatementEquityComponentsAxis" xlink:title="Definition : us-gaap_ClassOfWarrantOrRightTable to us-gaap_StatementEquityComponentsAxis" xlink:type="arc" use="optional" order="2" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquityComponentDomain" xlink:label="us-gaap_EquityComponentDomain" xlink:title="us-gaap_EquityComponentDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_StatementEquityComponentsAxis" xlink:to="us-gaap_EquityComponentDomain" xlink:title="Definition : us-gaap_StatementEquityComponentsAxis to us-gaap_EquityComponentDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockMember" xlink:label="us-gaap_CommonStockMember" xlink:title="us-gaap_CommonStockMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EquityComponentDomain" xlink:to="us-gaap_CommonStockMember" xlink:title="Definition : us-gaap_EquityComponentDomain to us-gaap_CommonStockMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquityComponentDomain" xlink:label="us-gaap_EquityComponentDomain_1" xlink:title="us-gaap_EquityComponentDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_StatementEquityComponentsAxis" xlink:to="us-gaap_EquityComponentDomain_1" xlink:title="Definition : us-gaap_StatementEquityComponentsAxis to us-gaap_EquityComponentDomain" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementClassOfStockAxis" xlink:label="us-gaap_StatementClassOfStockAxis" xlink:title="us-gaap_StatementClassOfStockAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ClassOfWarrantOrRightTable" xlink:to="us-gaap_StatementClassOfStockAxis" xlink:title="Definition : us-gaap_ClassOfWarrantOrRightTable to us-gaap_StatementClassOfStockAxis" xlink:type="arc" use="optional" order="3" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfStockDomain" xlink:label="us-gaap_ClassOfStockDomain" xlink:title="us-gaap_ClassOfStockDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_StatementClassOfStockAxis" xlink:to="us-gaap_ClassOfStockDomain" xlink:title="Definition : us-gaap_StatementClassOfStockAxis to us-gaap_ClassOfStockDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonClassAMember" xlink:label="us-gaap_CommonClassAMember" xlink:title="us-gaap_CommonClassAMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ClassOfStockDomain" xlink:to="us-gaap_CommonClassAMember" xlink:title="Definition : us-gaap_ClassOfStockDomain to us-gaap_CommonClassAMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonClassBMember" xlink:label="us-gaap_CommonClassBMember" xlink:title="us-gaap_CommonClassBMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ClassOfStockDomain" xlink:to="us-gaap_CommonClassBMember" xlink:title="Definition : us-gaap_ClassOfStockDomain to us-gaap_CommonClassBMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfStockDomain" xlink:label="us-gaap_ClassOfStockDomain_1" xlink:title="us-gaap_ClassOfStockDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_StatementClassOfStockAxis" xlink:to="us-gaap_ClassOfStockDomain_1" xlink:title="Definition : us-gaap_StatementClassOfStockAxis to us-gaap_ClassOfStockDomain" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
  </link:definitionLink>
  <link:definitionLink xlink:type="extended" xlink:role="http://eveairmobility.com/role/SummaryofSignificantAccountingPoliciesDetails5">
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:title="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsAndMethodologyAbstract" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsAndMethodologyAbstract" xlink:title="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsAndMethodologyAbstract" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsAndMethodologyAbstract" xlink:title="Definition : us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems to us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsAndMethodologyAbstract" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate" xlink:title="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsAndMethodologyAbstract" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate" xlink:title="Definition : us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsAndMethodologyAbstract to us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1" xlink:title="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsAndMethodologyAbstract" xlink:to="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1" xlink:title="Definition : us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsAndMethodologyAbstract to us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate" xlink:title="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsAndMethodologyAbstract" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate" xlink:title="Definition : us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsAndMethodologyAbstract to us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate" xlink:type="arc" use="optional" order="2" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExercisePrice" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExercisePrice" xlink:title="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExercisePrice" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsAndMethodologyAbstract" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExercisePrice" xlink:title="Definition : us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsAndMethodologyAbstract to us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExercisePrice" xlink:type="arc" use="optional" order="3" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate" xlink:title="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsAndMethodologyAbstract" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate" xlink:title="Definition : us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsAndMethodologyAbstract to us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate" xlink:type="arc" use="optional" order="4" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedStockPrice" xlink:label="evex_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedStockPrice" xlink:title="evex_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedStockPrice" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsAndMethodologyAbstract" xlink:to="evex_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedStockPrice" xlink:title="Definition : us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsAndMethodologyAbstract to evex_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedStockPrice" xlink:type="arc" use="optional" order="5" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsProbabilityWeightedAverageOfAdditionalSharesToBeIssuedForForwardContract" xlink:label="evex_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsProbabilityWeightedAverageOfAdditionalSharesToBeIssuedForForwardContract" xlink:title="evex_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsProbabilityWeightedAverageOfAdditionalSharesToBeIssuedForForwardContract" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsAndMethodologyAbstract" xlink:to="evex_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsProbabilityWeightedAverageOfAdditionalSharesToBeIssuedForForwardContract" xlink:title="Definition : us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsAndMethodologyAbstract to evex_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsProbabilityWeightedAverageOfAdditionalSharesToBeIssuedForForwardContract" xlink:type="arc" use="optional" order="6" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:label="us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:title="us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:to="us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:title="Definition : us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems to us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:type="arc" use="optional" order="1" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AwardTypeAxis" xlink:label="us-gaap_AwardTypeAxis" xlink:title="us-gaap_AwardTypeAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:to="us-gaap_AwardTypeAxis" xlink:title="Definition : us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable to us-gaap_AwardTypeAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:label="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:title="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_AwardTypeAxis" xlink:to="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:title="Definition : us-gaap_AwardTypeAxis to us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EmployeeStockOptionMember" xlink:label="us-gaap_EmployeeStockOptionMember" xlink:title="us-gaap_EmployeeStockOptionMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:to="us-gaap_EmployeeStockOptionMember" xlink:title="Definition : us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain to us-gaap_EmployeeStockOptionMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:label="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_1" xlink:title="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_AwardTypeAxis" xlink:to="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_1" xlink:title="Definition : us-gaap_AwardTypeAxis to us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
  </link:definitionLink>
  <link:definitionLink xlink:type="extended" xlink:role="http://eveairmobility.com/role/SharebasedpaymentsDetails1">
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:title="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:label="us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:title="us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:to="us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:title="Definition : us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems to us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:type="arc" use="optional" order="0" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeStatementLocationAxis" xlink:label="us-gaap_IncomeStatementLocationAxis" xlink:title="us-gaap_IncomeStatementLocationAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:to="us-gaap_IncomeStatementLocationAxis" xlink:title="Definition : us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable to us-gaap_IncomeStatementLocationAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeStatementLocationDomain" xlink:label="us-gaap_IncomeStatementLocationDomain" xlink:title="us-gaap_IncomeStatementLocationDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_IncomeStatementLocationAxis" xlink:to="us-gaap_IncomeStatementLocationDomain" xlink:title="Definition : us-gaap_IncomeStatementLocationAxis to us-gaap_IncomeStatementLocationDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SellingGeneralAndAdministrativeExpensesMember" xlink:label="us-gaap_SellingGeneralAndAdministrativeExpensesMember" xlink:title="us-gaap_SellingGeneralAndAdministrativeExpensesMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_IncomeStatementLocationDomain" xlink:to="us-gaap_SellingGeneralAndAdministrativeExpensesMember" xlink:title="Definition : us-gaap_IncomeStatementLocationDomain to us-gaap_SellingGeneralAndAdministrativeExpensesMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ResearchAndDevelopmentExpenseMember" xlink:label="us-gaap_ResearchAndDevelopmentExpenseMember" xlink:title="us-gaap_ResearchAndDevelopmentExpenseMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_IncomeStatementLocationDomain" xlink:to="us-gaap_ResearchAndDevelopmentExpenseMember" xlink:title="Definition : us-gaap_IncomeStatementLocationDomain to us-gaap_ResearchAndDevelopmentExpenseMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeStatementLocationDomain" xlink:label="us-gaap_IncomeStatementLocationDomain_1" xlink:title="us-gaap_IncomeStatementLocationDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_IncomeStatementLocationAxis" xlink:to="us-gaap_IncomeStatementLocationDomain_1" xlink:title="Definition : us-gaap_IncomeStatementLocationAxis to us-gaap_IncomeStatementLocationDomain" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PlanNameAxis" xlink:label="us-gaap_PlanNameAxis" xlink:title="us-gaap_PlanNameAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:to="us-gaap_PlanNameAxis" xlink:title="Definition : us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable to us-gaap_PlanNameAxis" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PlanNameDomain" xlink:label="us-gaap_PlanNameDomain" xlink:title="us-gaap_PlanNameDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_PlanNameAxis" xlink:to="us-gaap_PlanNameDomain" xlink:title="Definition : us-gaap_PlanNameAxis to us-gaap_PlanNameDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_StockIncentivePlan2022Member" xlink:label="evex_StockIncentivePlan2022Member" xlink:title="evex_StockIncentivePlan2022Member" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_PlanNameDomain" xlink:to="evex_StockIncentivePlan2022Member" xlink:title="Definition : us-gaap_PlanNameDomain to evex_StockIncentivePlan2022Member" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PlanNameDomain" xlink:label="us-gaap_PlanNameDomain_1" xlink:title="us-gaap_PlanNameDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_PlanNameAxis" xlink:to="us-gaap_PlanNameDomain_1" xlink:title="Definition : us-gaap_PlanNameAxis to us-gaap_PlanNameDomain" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
  </link:definitionLink>
  <link:definitionLink xlink:type="extended" xlink:role="http://eveairmobility.com/role/FinancialandforeignexchangegainnetDetails1">
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems" xlink:label="us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems" xlink:title="us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancialInstrumentsFinancialAssetsBalanceSheetGroupingsAbstract" xlink:label="us-gaap_FinancialInstrumentsFinancialAssetsBalanceSheetGroupingsAbstract" xlink:title="us-gaap_FinancialInstrumentsFinancialAssetsBalanceSheetGroupingsAbstract" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems" xlink:to="us-gaap_FinancialInstrumentsFinancialAssetsBalanceSheetGroupingsAbstract" xlink:title="Definition : us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems to us-gaap_FinancialInstrumentsFinancialAssetsBalanceSheetGroupingsAbstract" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashAndCashEquivalentsFairValueDisclosure" xlink:label="us-gaap_CashAndCashEquivalentsFairValueDisclosure" xlink:title="us-gaap_CashAndCashEquivalentsFairValueDisclosure" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_FinancialInstrumentsFinancialAssetsBalanceSheetGroupingsAbstract" xlink:to="us-gaap_CashAndCashEquivalentsFairValueDisclosure" xlink:title="Definition : us-gaap_FinancialInstrumentsFinancialAssetsBalanceSheetGroupingsAbstract to us-gaap_CashAndCashEquivalentsFairValueDisclosure" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentsFairValueDisclosure" xlink:label="us-gaap_InvestmentsFairValueDisclosure" xlink:title="us-gaap_InvestmentsFairValueDisclosure" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_FinancialInstrumentsFinancialAssetsBalanceSheetGroupingsAbstract" xlink:to="us-gaap_InvestmentsFairValueDisclosure" xlink:title="Definition : us-gaap_FinancialInstrumentsFinancialAssetsBalanceSheetGroupingsAbstract to us-gaap_InvestmentsFairValueDisclosure" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherAssetsFairValueDisclosure" xlink:label="us-gaap_OtherAssetsFairValueDisclosure" xlink:title="us-gaap_OtherAssetsFairValueDisclosure" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_FinancialInstrumentsFinancialAssetsBalanceSheetGroupingsAbstract" xlink:to="us-gaap_OtherAssetsFairValueDisclosure" xlink:title="Definition : us-gaap_FinancialInstrumentsFinancialAssetsBalanceSheetGroupingsAbstract to us-gaap_OtherAssetsFairValueDisclosure" xlink:type="arc" use="optional" order="2" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AssetsFairValueDisclosure" xlink:label="us-gaap_AssetsFairValueDisclosure" xlink:title="us-gaap_AssetsFairValueDisclosure" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_FinancialInstrumentsFinancialAssetsBalanceSheetGroupingsAbstract" xlink:to="us-gaap_AssetsFairValueDisclosure" xlink:title="Definition : us-gaap_FinancialInstrumentsFinancialAssetsBalanceSheetGroupingsAbstract to us-gaap_AssetsFairValueDisclosure" xlink:type="arc" use="optional" order="3" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancialInstrumentsFinancialLiabilitiesBalanceSheetGroupingsAbstract" xlink:label="us-gaap_FinancialInstrumentsFinancialLiabilitiesBalanceSheetGroupingsAbstract" xlink:title="us-gaap_FinancialInstrumentsFinancialLiabilitiesBalanceSheetGroupingsAbstract" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems" xlink:to="us-gaap_FinancialInstrumentsFinancialLiabilitiesBalanceSheetGroupingsAbstract" xlink:title="Definition : us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems to us-gaap_FinancialInstrumentsFinancialLiabilitiesBalanceSheetGroupingsAbstract" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccountsPayableFairValueDisclosure" xlink:label="us-gaap_AccountsPayableFairValueDisclosure" xlink:title="us-gaap_AccountsPayableFairValueDisclosure" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_FinancialInstrumentsFinancialLiabilitiesBalanceSheetGroupingsAbstract" xlink:to="us-gaap_AccountsPayableFairValueDisclosure" xlink:title="Definition : us-gaap_FinancialInstrumentsFinancialLiabilitiesBalanceSheetGroupingsAbstract to us-gaap_AccountsPayableFairValueDisclosure" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeAssetsLiabilitiesAtFairValueNet" xlink:label="us-gaap_DerivativeAssetsLiabilitiesAtFairValueNet" xlink:title="us-gaap_DerivativeAssetsLiabilitiesAtFairValueNet" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_FinancialInstrumentsFinancialLiabilitiesBalanceSheetGroupingsAbstract" xlink:to="us-gaap_DerivativeAssetsLiabilitiesAtFairValueNet" xlink:title="Definition : us-gaap_FinancialInstrumentsFinancialLiabilitiesBalanceSheetGroupingsAbstract to us-gaap_DerivativeAssetsLiabilitiesAtFairValueNet" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_OtherPayablesFairValueDisclosure" xlink:label="evex_OtherPayablesFairValueDisclosure" xlink:title="evex_OtherPayablesFairValueDisclosure" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_FinancialInstrumentsFinancialLiabilitiesBalanceSheetGroupingsAbstract" xlink:to="evex_OtherPayablesFairValueDisclosure" xlink:title="Definition : us-gaap_FinancialInstrumentsFinancialLiabilitiesBalanceSheetGroupingsAbstract to evex_OtherPayablesFairValueDisclosure" xlink:type="arc" use="optional" order="2" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherLiabilitiesFairValueDisclosure" xlink:label="us-gaap_OtherLiabilitiesFairValueDisclosure" xlink:title="us-gaap_OtherLiabilitiesFairValueDisclosure" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_FinancialInstrumentsFinancialLiabilitiesBalanceSheetGroupingsAbstract" xlink:to="us-gaap_OtherLiabilitiesFairValueDisclosure" xlink:title="Definition : us-gaap_FinancialInstrumentsFinancialLiabilitiesBalanceSheetGroupingsAbstract to us-gaap_OtherLiabilitiesFairValueDisclosure" xlink:type="arc" use="optional" order="3" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LiabilitiesFairValueDisclosure" xlink:label="us-gaap_LiabilitiesFairValueDisclosure" xlink:title="us-gaap_LiabilitiesFairValueDisclosure" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_FinancialInstrumentsFinancialLiabilitiesBalanceSheetGroupingsAbstract" xlink:to="us-gaap_LiabilitiesFairValueDisclosure" xlink:title="Definition : us-gaap_FinancialInstrumentsFinancialLiabilitiesBalanceSheetGroupingsAbstract to us-gaap_LiabilitiesFairValueDisclosure" xlink:type="arc" use="optional" order="4" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueByBalanceSheetGroupingTable" xlink:label="us-gaap_FairValueByBalanceSheetGroupingTable" xlink:title="us-gaap_FairValueByBalanceSheetGroupingTable" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems" xlink:to="us-gaap_FairValueByBalanceSheetGroupingTable" xlink:title="Definition : us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems to us-gaap_FairValueByBalanceSheetGroupingTable" xlink:type="arc" use="optional" order="2" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancialInstrumentAxis" xlink:label="us-gaap_FinancialInstrumentAxis" xlink:title="us-gaap_FinancialInstrumentAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_FairValueByBalanceSheetGroupingTable" xlink:to="us-gaap_FinancialInstrumentAxis" xlink:title="Definition : us-gaap_FairValueByBalanceSheetGroupingTable to us-gaap_FinancialInstrumentAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain" xlink:label="us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain" xlink:title="us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_FinancialInstrumentAxis" xlink:to="us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain" xlink:title="Definition : us-gaap_FinancialInstrumentAxis to us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_AmortizedCostMember" xlink:label="evex_AmortizedCostMember" xlink:title="evex_AmortizedCostMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain" xlink:to="evex_AmortizedCostMember" xlink:title="Definition : us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain to evex_AmortizedCostMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_HeldToMaturityMember" xlink:label="evex_HeldToMaturityMember" xlink:title="evex_HeldToMaturityMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain" xlink:to="evex_HeldToMaturityMember" xlink:title="Definition : us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain to evex_HeldToMaturityMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_AvailableForSaleMember" xlink:label="evex_AvailableForSaleMember" xlink:title="evex_AvailableForSaleMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain" xlink:to="evex_AvailableForSaleMember" xlink:title="Definition : us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain to evex_AvailableForSaleMember" xlink:type="arc" use="optional" order="2" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_TradingMember" xlink:label="evex_TradingMember" xlink:title="evex_TradingMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain" xlink:to="evex_TradingMember" xlink:title="Definition : us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain to evex_TradingMember" xlink:type="arc" use="optional" order="3" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain" xlink:label="us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_1" xlink:title="us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_FinancialInstrumentAxis" xlink:to="us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_1" xlink:title="Definition : us-gaap_FinancialInstrumentAxis to us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
  </link:definitionLink>
  <link:definitionLink xlink:type="extended" xlink:role="http://eveairmobility.com/role/CapitalizedsoftwarenetScheduleofCapitalizedSoftwareNetDetails">
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_ScheduleOfCapitalizedSoftwareNetLineItems" xlink:label="evex_ScheduleOfCapitalizedSoftwareNetLineItems" xlink:title="evex_ScheduleOfCapitalizedSoftwareNetLineItems" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CapitalizedComputerSoftwareNet" xlink:label="us-gaap_CapitalizedComputerSoftwareNet" xlink:title="us-gaap_CapitalizedComputerSoftwareNet" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="evex_ScheduleOfCapitalizedSoftwareNetLineItems" xlink:to="us-gaap_CapitalizedComputerSoftwareNet" xlink:title="Definition : evex_ScheduleOfCapitalizedSoftwareNetLineItems to us-gaap_CapitalizedComputerSoftwareNet" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CapitalizedComputerSoftwareAdditions" xlink:label="us-gaap_CapitalizedComputerSoftwareAdditions" xlink:title="us-gaap_CapitalizedComputerSoftwareAdditions" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="evex_ScheduleOfCapitalizedSoftwareNetLineItems" xlink:to="us-gaap_CapitalizedComputerSoftwareAdditions" xlink:title="Definition : evex_ScheduleOfCapitalizedSoftwareNetLineItems to us-gaap_CapitalizedComputerSoftwareAdditions" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CapitalizedComputerSoftwarePeriodIncreaseDecrease" xlink:label="us-gaap_CapitalizedComputerSoftwarePeriodIncreaseDecrease" xlink:title="us-gaap_CapitalizedComputerSoftwarePeriodIncreaseDecrease" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="evex_ScheduleOfCapitalizedSoftwareNetLineItems" xlink:to="us-gaap_CapitalizedComputerSoftwarePeriodIncreaseDecrease" xlink:title="Definition : evex_ScheduleOfCapitalizedSoftwareNetLineItems to us-gaap_CapitalizedComputerSoftwarePeriodIncreaseDecrease" xlink:type="arc" use="optional" order="2" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_ScheduleOfCapitalizedSoftwareNetTable" xlink:label="evex_ScheduleOfCapitalizedSoftwareNetTable" xlink:title="evex_ScheduleOfCapitalizedSoftwareNetTable" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="evex_ScheduleOfCapitalizedSoftwareNetLineItems" xlink:to="evex_ScheduleOfCapitalizedSoftwareNetTable" xlink:title="Definition : evex_ScheduleOfCapitalizedSoftwareNetLineItems to evex_ScheduleOfCapitalizedSoftwareNetTable" xlink:type="arc" use="optional" order="3" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_AmortisationAndGrossCarryingAmountAxis" xlink:label="evex_AmortisationAndGrossCarryingAmountAxis" xlink:title="evex_AmortisationAndGrossCarryingAmountAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="evex_ScheduleOfCapitalizedSoftwareNetTable" xlink:to="evex_AmortisationAndGrossCarryingAmountAxis" xlink:title="Definition : evex_ScheduleOfCapitalizedSoftwareNetTable to evex_AmortisationAndGrossCarryingAmountAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_AmortisationAndGrossCarryingAmountDomain" xlink:label="evex_AmortisationAndGrossCarryingAmountDomain" xlink:title="evex_AmortisationAndGrossCarryingAmountDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="evex_AmortisationAndGrossCarryingAmountAxis" xlink:to="evex_AmortisationAndGrossCarryingAmountDomain" xlink:title="Definition : evex_AmortisationAndGrossCarryingAmountAxis to evex_AmortisationAndGrossCarryingAmountDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_GrossCarryingAmountMember" xlink:label="evex_GrossCarryingAmountMember" xlink:title="evex_GrossCarryingAmountMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="evex_AmortisationAndGrossCarryingAmountDomain" xlink:to="evex_GrossCarryingAmountMember" xlink:title="Definition : evex_AmortisationAndGrossCarryingAmountDomain to evex_GrossCarryingAmountMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_AccumulatedAmortizationAdjustmentMember" xlink:label="evex_AccumulatedAmortizationAdjustmentMember" xlink:title="evex_AccumulatedAmortizationAdjustmentMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="evex_AmortisationAndGrossCarryingAmountDomain" xlink:to="evex_AccumulatedAmortizationAdjustmentMember" xlink:title="Definition : evex_AmortisationAndGrossCarryingAmountDomain to evex_AccumulatedAmortizationAdjustmentMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_AmortisationAndGrossCarryingAmountDomain" xlink:label="evex_AmortisationAndGrossCarryingAmountDomain_1" xlink:title="evex_AmortisationAndGrossCarryingAmountDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="evex_AmortisationAndGrossCarryingAmountAxis" xlink:to="evex_AmortisationAndGrossCarryingAmountDomain_1" xlink:title="Definition : evex_AmortisationAndGrossCarryingAmountAxis to evex_AmortisationAndGrossCarryingAmountDomain" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
  </link:definitionLink>
  <link:definitionLink xlink:type="extended" xlink:role="http://eveairmobility.com/role/FinancialinstrumentsDetails">
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueConcentrationOfRiskFinancialStatementCaptionsLineItems" xlink:label="us-gaap_FairValueConcentrationOfRiskFinancialStatementCaptionsLineItems" xlink:title="us-gaap_FairValueConcentrationOfRiskFinancialStatementCaptionsLineItems" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueConcentrationOfRiskCashAndCashEquivalents" xlink:label="us-gaap_FairValueConcentrationOfRiskCashAndCashEquivalents" xlink:title="us-gaap_FairValueConcentrationOfRiskCashAndCashEquivalents" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_FairValueConcentrationOfRiskFinancialStatementCaptionsLineItems" xlink:to="us-gaap_FairValueConcentrationOfRiskCashAndCashEquivalents" xlink:title="Definition : us-gaap_FairValueConcentrationOfRiskFinancialStatementCaptionsLineItems to us-gaap_FairValueConcentrationOfRiskCashAndCashEquivalents" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_PercentageOfCashAndCashEquivalentsFairValueConcentrationOfRisk" xlink:label="evex_PercentageOfCashAndCashEquivalentsFairValueConcentrationOfRisk" xlink:title="evex_PercentageOfCashAndCashEquivalentsFairValueConcentrationOfRisk" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_FairValueConcentrationOfRiskFinancialStatementCaptionsLineItems" xlink:to="evex_PercentageOfCashAndCashEquivalentsFairValueConcentrationOfRisk" xlink:title="Definition : us-gaap_FairValueConcentrationOfRiskFinancialStatementCaptionsLineItems to evex_PercentageOfCashAndCashEquivalentsFairValueConcentrationOfRisk" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueConcentrationOfRiskTable" xlink:label="us-gaap_FairValueConcentrationOfRiskTable" xlink:title="us-gaap_FairValueConcentrationOfRiskTable" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="us-gaap_FairValueConcentrationOfRiskFinancialStatementCaptionsLineItems" xlink:to="us-gaap_FairValueConcentrationOfRiskTable" xlink:title="Definition : us-gaap_FairValueConcentrationOfRiskFinancialStatementCaptionsLineItems to us-gaap_FairValueConcentrationOfRiskTable" xlink:type="arc" use="optional" order="2" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueConcentrationOfRiskDisclosureItemsAxis" xlink:label="us-gaap_FairValueConcentrationOfRiskDisclosureItemsAxis" xlink:title="us-gaap_FairValueConcentrationOfRiskDisclosureItemsAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_FairValueConcentrationOfRiskTable" xlink:to="us-gaap_FairValueConcentrationOfRiskDisclosureItemsAxis" xlink:title="Definition : us-gaap_FairValueConcentrationOfRiskTable to us-gaap_FairValueConcentrationOfRiskDisclosureItemsAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueConcentrationOfRiskDisclosureItemsDomain" xlink:label="us-gaap_FairValueConcentrationOfRiskDisclosureItemsDomain" xlink:title="us-gaap_FairValueConcentrationOfRiskDisclosureItemsDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_FairValueConcentrationOfRiskDisclosureItemsAxis" xlink:to="us-gaap_FairValueConcentrationOfRiskDisclosureItemsDomain" xlink:title="Definition : us-gaap_FairValueConcentrationOfRiskDisclosureItemsAxis to us-gaap_FairValueConcentrationOfRiskDisclosureItemsDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_InterestRateRiskPreFixedMember" xlink:label="evex_InterestRateRiskPreFixedMember" xlink:title="evex_InterestRateRiskPreFixedMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_FairValueConcentrationOfRiskDisclosureItemsDomain" xlink:to="evex_InterestRateRiskPreFixedMember" xlink:title="Definition : us-gaap_FairValueConcentrationOfRiskDisclosureItemsDomain to evex_InterestRateRiskPreFixedMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_InterestRateRiskPostFixedMember" xlink:label="evex_InterestRateRiskPostFixedMember" xlink:title="evex_InterestRateRiskPostFixedMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_FairValueConcentrationOfRiskDisclosureItemsDomain" xlink:to="evex_InterestRateRiskPostFixedMember" xlink:title="Definition : us-gaap_FairValueConcentrationOfRiskDisclosureItemsDomain to evex_InterestRateRiskPostFixedMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueConcentrationOfRiskDisclosureItemsDomain" xlink:label="us-gaap_FairValueConcentrationOfRiskDisclosureItemsDomain_1" xlink:title="us-gaap_FairValueConcentrationOfRiskDisclosureItemsDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_FairValueConcentrationOfRiskDisclosureItemsAxis" xlink:to="us-gaap_FairValueConcentrationOfRiskDisclosureItemsDomain_1" xlink:title="Definition : us-gaap_FairValueConcentrationOfRiskDisclosureItemsAxis to us-gaap_FairValueConcentrationOfRiskDisclosureItemsDomain" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueByAssetClassAxis" xlink:label="us-gaap_FairValueByAssetClassAxis" xlink:title="us-gaap_FairValueByAssetClassAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_FairValueConcentrationOfRiskTable" xlink:to="us-gaap_FairValueByAssetClassAxis" xlink:title="Definition : us-gaap_FairValueConcentrationOfRiskTable to us-gaap_FairValueByAssetClassAxis" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain" xlink:label="us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain" xlink:title="us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_FairValueByAssetClassAxis" xlink:to="us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain" xlink:title="Definition : us-gaap_FairValueByAssetClassAxis to us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashAndCashEquivalentsMember" xlink:label="us-gaap_CashAndCashEquivalentsMember" xlink:title="us-gaap_CashAndCashEquivalentsMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain" xlink:to="us-gaap_CashAndCashEquivalentsMember" xlink:title="Definition : us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain to us-gaap_CashAndCashEquivalentsMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain" xlink:label="us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_1" xlink:title="us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_FairValueByAssetClassAxis" xlink:to="us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_1" xlink:title="Definition : us-gaap_FairValueByAssetClassAxis to us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
  </link:definitionLink>
  <link:definitionLink xlink:type="extended" xlink:role="http://eveairmobility.com/role/FinancialinstrumentsDetails1">
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueConcentrationOfRiskFinancialStatementCaptionsLineItems" xlink:label="us-gaap_FairValueConcentrationOfRiskFinancialStatementCaptionsLineItems" xlink:title="us-gaap_FairValueConcentrationOfRiskFinancialStatementCaptionsLineItems" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueConcentrationOfRiskCashAndCashEquivalents" xlink:label="us-gaap_FairValueConcentrationOfRiskCashAndCashEquivalents" xlink:title="us-gaap_FairValueConcentrationOfRiskCashAndCashEquivalents" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_FairValueConcentrationOfRiskFinancialStatementCaptionsLineItems" xlink:to="us-gaap_FairValueConcentrationOfRiskCashAndCashEquivalents" xlink:title="Definition : us-gaap_FairValueConcentrationOfRiskFinancialStatementCaptionsLineItems to us-gaap_FairValueConcentrationOfRiskCashAndCashEquivalents" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_PercentageOfCashAndCashEquivalentsFairValueConcentrationOfRisk" xlink:label="evex_PercentageOfCashAndCashEquivalentsFairValueConcentrationOfRisk" xlink:title="evex_PercentageOfCashAndCashEquivalentsFairValueConcentrationOfRisk" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_FairValueConcentrationOfRiskFinancialStatementCaptionsLineItems" xlink:to="evex_PercentageOfCashAndCashEquivalentsFairValueConcentrationOfRisk" xlink:title="Definition : us-gaap_FairValueConcentrationOfRiskFinancialStatementCaptionsLineItems to evex_PercentageOfCashAndCashEquivalentsFairValueConcentrationOfRisk" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ForeignCurrencyFairValueHedgeDerivativeTable" xlink:label="us-gaap_ForeignCurrencyFairValueHedgeDerivativeTable" xlink:title="us-gaap_ForeignCurrencyFairValueHedgeDerivativeTable" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="us-gaap_FairValueConcentrationOfRiskFinancialStatementCaptionsLineItems" xlink:to="us-gaap_ForeignCurrencyFairValueHedgeDerivativeTable" xlink:title="Definition : us-gaap_FairValueConcentrationOfRiskFinancialStatementCaptionsLineItems to us-gaap_ForeignCurrencyFairValueHedgeDerivativeTable" xlink:type="arc" use="optional" order="2" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueByAssetClassAxis" xlink:label="us-gaap_FairValueByAssetClassAxis" xlink:title="us-gaap_FairValueByAssetClassAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ForeignCurrencyFairValueHedgeDerivativeTable" xlink:to="us-gaap_FairValueByAssetClassAxis" xlink:title="Definition : us-gaap_ForeignCurrencyFairValueHedgeDerivativeTable to us-gaap_FairValueByAssetClassAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain" xlink:label="us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain" xlink:title="us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_FairValueByAssetClassAxis" xlink:to="us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain" xlink:title="Definition : us-gaap_FairValueByAssetClassAxis to us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashAndCashEquivalentsMember" xlink:label="us-gaap_CashAndCashEquivalentsMember" xlink:title="us-gaap_CashAndCashEquivalentsMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain" xlink:to="us-gaap_CashAndCashEquivalentsMember" xlink:title="Definition : us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain to us-gaap_CashAndCashEquivalentsMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain" xlink:label="us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_1" xlink:title="us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_FairValueByAssetClassAxis" xlink:to="us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_1" xlink:title="Definition : us-gaap_FairValueByAssetClassAxis to us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeInstrumentRiskAxis" xlink:label="us-gaap_DerivativeInstrumentRiskAxis" xlink:title="us-gaap_DerivativeInstrumentRiskAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ForeignCurrencyFairValueHedgeDerivativeTable" xlink:to="us-gaap_DerivativeInstrumentRiskAxis" xlink:title="Definition : us-gaap_ForeignCurrencyFairValueHedgeDerivativeTable to us-gaap_DerivativeInstrumentRiskAxis" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeContractTypeDomain" xlink:label="us-gaap_DerivativeContractTypeDomain" xlink:title="us-gaap_DerivativeContractTypeDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_DerivativeInstrumentRiskAxis" xlink:to="us-gaap_DerivativeContractTypeDomain" xlink:title="Definition : us-gaap_DerivativeInstrumentRiskAxis to us-gaap_DerivativeContractTypeDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_InterbankDepositCertificateMember" xlink:label="evex_InterbankDepositCertificateMember" xlink:title="evex_InterbankDepositCertificateMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DerivativeContractTypeDomain" xlink:to="evex_InterbankDepositCertificateMember" xlink:title="Definition : us-gaap_DerivativeContractTypeDomain to evex_InterbankDepositCertificateMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeContractTypeDomain" xlink:label="us-gaap_DerivativeContractTypeDomain_1" xlink:title="us-gaap_DerivativeContractTypeDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_DerivativeInstrumentRiskAxis" xlink:to="us-gaap_DerivativeContractTypeDomain_1" xlink:title="Definition : us-gaap_DerivativeInstrumentRiskAxis to us-gaap_DerivativeContractTypeDomain" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
  </link:definitionLink>
  <link:definitionLink xlink:type="extended" xlink:role="http://eveairmobility.com/role/FinancialinstrumentsDetails2">
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ForeignCurrencyFairValueHedgeDerivativeLineItems" xlink:label="us-gaap_ForeignCurrencyFairValueHedgeDerivativeLineItems" xlink:title="us-gaap_ForeignCurrencyFairValueHedgeDerivativeLineItems" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ForeignCurrencyFairValueHedgeLiabilityAtFairValue" xlink:label="us-gaap_ForeignCurrencyFairValueHedgeLiabilityAtFairValue" xlink:title="us-gaap_ForeignCurrencyFairValueHedgeLiabilityAtFairValue" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ForeignCurrencyFairValueHedgeDerivativeLineItems" xlink:to="us-gaap_ForeignCurrencyFairValueHedgeLiabilityAtFairValue" xlink:title="Definition : us-gaap_ForeignCurrencyFairValueHedgeDerivativeLineItems to us-gaap_ForeignCurrencyFairValueHedgeLiabilityAtFairValue" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ForeignCurrencyFairValueHedgeAssetAtFairValue" xlink:label="us-gaap_ForeignCurrencyFairValueHedgeAssetAtFairValue" xlink:title="us-gaap_ForeignCurrencyFairValueHedgeAssetAtFairValue" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ForeignCurrencyFairValueHedgeDerivativeLineItems" xlink:to="us-gaap_ForeignCurrencyFairValueHedgeAssetAtFairValue" xlink:title="Definition : us-gaap_ForeignCurrencyFairValueHedgeDerivativeLineItems to us-gaap_ForeignCurrencyFairValueHedgeAssetAtFairValue" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ForeignCurrencyFairValueHedgeDerivativeAtFairValueNet" xlink:label="us-gaap_ForeignCurrencyFairValueHedgeDerivativeAtFairValueNet" xlink:title="us-gaap_ForeignCurrencyFairValueHedgeDerivativeAtFairValueNet" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ForeignCurrencyFairValueHedgeDerivativeLineItems" xlink:to="us-gaap_ForeignCurrencyFairValueHedgeDerivativeAtFairValueNet" xlink:title="Definition : us-gaap_ForeignCurrencyFairValueHedgeDerivativeLineItems to us-gaap_ForeignCurrencyFairValueHedgeDerivativeAtFairValueNet" xlink:type="arc" use="optional" order="2" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ForeignCurrencyFairValueHedgeDerivativeTable" xlink:label="us-gaap_ForeignCurrencyFairValueHedgeDerivativeTable" xlink:title="us-gaap_ForeignCurrencyFairValueHedgeDerivativeTable" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="us-gaap_ForeignCurrencyFairValueHedgeDerivativeLineItems" xlink:to="us-gaap_ForeignCurrencyFairValueHedgeDerivativeTable" xlink:title="Definition : us-gaap_ForeignCurrencyFairValueHedgeDerivativeLineItems to us-gaap_ForeignCurrencyFairValueHedgeDerivativeTable" xlink:type="arc" use="optional" order="3" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BalanceSheetLocationAxis" xlink:label="us-gaap_BalanceSheetLocationAxis" xlink:title="us-gaap_BalanceSheetLocationAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ForeignCurrencyFairValueHedgeDerivativeTable" xlink:to="us-gaap_BalanceSheetLocationAxis" xlink:title="Definition : us-gaap_ForeignCurrencyFairValueHedgeDerivativeTable to us-gaap_BalanceSheetLocationAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BalanceSheetLocationDomain" xlink:label="us-gaap_BalanceSheetLocationDomain" xlink:title="us-gaap_BalanceSheetLocationDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_BalanceSheetLocationAxis" xlink:to="us-gaap_BalanceSheetLocationDomain" xlink:title="Definition : us-gaap_BalanceSheetLocationAxis to us-gaap_BalanceSheetLocationDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccountsPayableAndAccruedLiabilitiesMember" xlink:label="us-gaap_AccountsPayableAndAccruedLiabilitiesMember" xlink:title="us-gaap_AccountsPayableAndAccruedLiabilitiesMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_BalanceSheetLocationDomain" xlink:to="us-gaap_AccountsPayableAndAccruedLiabilitiesMember" xlink:title="Definition : us-gaap_BalanceSheetLocationDomain to us-gaap_AccountsPayableAndAccruedLiabilitiesMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashAndCashEquivalentsMember" xlink:label="us-gaap_CashAndCashEquivalentsMember" xlink:title="us-gaap_CashAndCashEquivalentsMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_BalanceSheetLocationDomain" xlink:to="us-gaap_CashAndCashEquivalentsMember" xlink:title="Definition : us-gaap_BalanceSheetLocationDomain to us-gaap_CashAndCashEquivalentsMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BalanceSheetLocationDomain" xlink:label="us-gaap_BalanceSheetLocationDomain_1" xlink:title="us-gaap_BalanceSheetLocationDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_BalanceSheetLocationAxis" xlink:to="us-gaap_BalanceSheetLocationDomain_1" xlink:title="Definition : us-gaap_BalanceSheetLocationAxis to us-gaap_BalanceSheetLocationDomain" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
  </link:definitionLink>
  <link:definitionLink xlink:type="extended" xlink:role="http://eveairmobility.com/role/FinancialInstrumentsDetails3">
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeInstrumentsGainLossLineItems" xlink:label="us-gaap_DerivativeInstrumentsGainLossLineItems" xlink:title="us-gaap_DerivativeInstrumentsGainLossLineItems" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashEquivalentsAtCarryingValue" xlink:label="us-gaap_CashEquivalentsAtCarryingValue" xlink:title="us-gaap_CashEquivalentsAtCarryingValue" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DerivativeInstrumentsGainLossLineItems" xlink:to="us-gaap_CashEquivalentsAtCarryingValue" xlink:title="Definition : us-gaap_DerivativeInstrumentsGainLossLineItems to us-gaap_CashEquivalentsAtCarryingValue" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestRateFairValueHedgeDerivativeAtFairValueNet" xlink:label="us-gaap_InterestRateFairValueHedgeDerivativeAtFairValueNet" xlink:title="us-gaap_InterestRateFairValueHedgeDerivativeAtFairValueNet" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DerivativeInstrumentsGainLossLineItems" xlink:to="us-gaap_InterestRateFairValueHedgeDerivativeAtFairValueNet" xlink:title="Definition : us-gaap_DerivativeInstrumentsGainLossLineItems to us-gaap_InterestRateFairValueHedgeDerivativeAtFairValueNet" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_IncreaseDecreaseInFairValueOfInterestRateFairValueHedgingInstrumentsCashEquivalentsAndFinancialInvestments" xlink:label="evex_IncreaseDecreaseInFairValueOfInterestRateFairValueHedgingInstrumentsCashEquivalentsAndFinancialInvestments" xlink:title="evex_IncreaseDecreaseInFairValueOfInterestRateFairValueHedgingInstrumentsCashEquivalentsAndFinancialInvestments" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DerivativeInstrumentsGainLossLineItems" xlink:to="evex_IncreaseDecreaseInFairValueOfInterestRateFairValueHedgingInstrumentsCashEquivalentsAndFinancialInvestments" xlink:title="Definition : us-gaap_DerivativeInstrumentsGainLossLineItems to evex_IncreaseDecreaseInFairValueOfInterestRateFairValueHedgingInstrumentsCashEquivalentsAndFinancialInvestments" xlink:type="arc" use="optional" order="2" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInFairValueOfInterestRateFairValueHedgingInstruments1" xlink:label="us-gaap_IncreaseDecreaseInFairValueOfInterestRateFairValueHedgingInstruments1" xlink:title="us-gaap_IncreaseDecreaseInFairValueOfInterestRateFairValueHedgingInstruments1" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DerivativeInstrumentsGainLossLineItems" xlink:to="us-gaap_IncreaseDecreaseInFairValueOfInterestRateFairValueHedgingInstruments1" xlink:title="Definition : us-gaap_DerivativeInstrumentsGainLossLineItems to us-gaap_IncreaseDecreaseInFairValueOfInterestRateFairValueHedgingInstruments1" xlink:type="arc" use="optional" order="3" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PercentageOfDebtHedgedByInterestRateDerivatives" xlink:label="us-gaap_PercentageOfDebtHedgedByInterestRateDerivatives" xlink:title="us-gaap_PercentageOfDebtHedgedByInterestRateDerivatives" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DerivativeInstrumentsGainLossLineItems" xlink:to="us-gaap_PercentageOfDebtHedgedByInterestRateDerivatives" xlink:title="Definition : us-gaap_DerivativeInstrumentsGainLossLineItems to us-gaap_PercentageOfDebtHedgedByInterestRateDerivatives" xlink:type="arc" use="optional" order="4" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable" xlink:label="us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable" xlink:title="us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="us-gaap_DerivativeInstrumentsGainLossLineItems" xlink:to="us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable" xlink:title="Definition : us-gaap_DerivativeInstrumentsGainLossLineItems to us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable" xlink:type="arc" use="optional" order="5" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeInstrumentRiskAxis" xlink:label="us-gaap_DerivativeInstrumentRiskAxis" xlink:title="us-gaap_DerivativeInstrumentRiskAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable" xlink:to="us-gaap_DerivativeInstrumentRiskAxis" xlink:title="Definition : us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable to us-gaap_DerivativeInstrumentRiskAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeContractTypeDomain" xlink:label="us-gaap_DerivativeContractTypeDomain" xlink:title="us-gaap_DerivativeContractTypeDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_DerivativeInstrumentRiskAxis" xlink:to="us-gaap_DerivativeContractTypeDomain" xlink:title="Definition : us-gaap_DerivativeInstrumentRiskAxis to us-gaap_DerivativeContractTypeDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_InterbankDepositCertificateMember" xlink:label="evex_InterbankDepositCertificateMember" xlink:title="evex_InterbankDepositCertificateMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DerivativeContractTypeDomain" xlink:to="evex_InterbankDepositCertificateMember" xlink:title="Definition : us-gaap_DerivativeContractTypeDomain to evex_InterbankDepositCertificateMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeContractTypeDomain" xlink:label="us-gaap_DerivativeContractTypeDomain_1" xlink:title="us-gaap_DerivativeContractTypeDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_DerivativeInstrumentRiskAxis" xlink:to="us-gaap_DerivativeContractTypeDomain_1" xlink:title="Definition : us-gaap_DerivativeInstrumentRiskAxis to us-gaap_DerivativeContractTypeDomain" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_StatementScenarioAxis" xlink:label="srt_StatementScenarioAxis" xlink:title="srt_StatementScenarioAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable" xlink:to="srt_StatementScenarioAxis" xlink:title="Definition : us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable to srt_StatementScenarioAxis" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ScenarioUnspecifiedDomain" xlink:label="srt_ScenarioUnspecifiedDomain" xlink:title="srt_ScenarioUnspecifiedDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="srt_StatementScenarioAxis" xlink:to="srt_ScenarioUnspecifiedDomain" xlink:title="Definition : srt_StatementScenarioAxis to srt_ScenarioUnspecifiedDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_ProbableScenarioMinus50PercentageMember" xlink:label="evex_ProbableScenarioMinus50PercentageMember" xlink:title="evex_ProbableScenarioMinus50PercentageMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_ScenarioUnspecifiedDomain" xlink:to="evex_ProbableScenarioMinus50PercentageMember" xlink:title="Definition : srt_ScenarioUnspecifiedDomain to evex_ProbableScenarioMinus50PercentageMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_ProbableScenarioMinus25PercentageMember" xlink:label="evex_ProbableScenarioMinus25PercentageMember" xlink:title="evex_ProbableScenarioMinus25PercentageMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_ScenarioUnspecifiedDomain" xlink:to="evex_ProbableScenarioMinus25PercentageMember" xlink:title="Definition : srt_ScenarioUnspecifiedDomain to evex_ProbableScenarioMinus25PercentageMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_ProbableScenarioMember" xlink:label="evex_ProbableScenarioMember" xlink:title="evex_ProbableScenarioMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_ScenarioUnspecifiedDomain" xlink:to="evex_ProbableScenarioMember" xlink:title="Definition : srt_ScenarioUnspecifiedDomain to evex_ProbableScenarioMember" xlink:type="arc" use="optional" order="2" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_ProbableScenarioPlus25PercentageMember" xlink:label="evex_ProbableScenarioPlus25PercentageMember" xlink:title="evex_ProbableScenarioPlus25PercentageMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_ScenarioUnspecifiedDomain" xlink:to="evex_ProbableScenarioPlus25PercentageMember" xlink:title="Definition : srt_ScenarioUnspecifiedDomain to evex_ProbableScenarioPlus25PercentageMember" xlink:type="arc" use="optional" order="3" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_ProbableScenarioPlus50PercentageMember" xlink:label="evex_ProbableScenarioPlus50PercentageMember" xlink:title="evex_ProbableScenarioPlus50PercentageMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_ScenarioUnspecifiedDomain" xlink:to="evex_ProbableScenarioPlus50PercentageMember" xlink:title="Definition : srt_ScenarioUnspecifiedDomain to evex_ProbableScenarioPlus50PercentageMember" xlink:type="arc" use="optional" order="4" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ScenarioUnspecifiedDomain" xlink:label="srt_ScenarioUnspecifiedDomain_1" xlink:title="srt_ScenarioUnspecifiedDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="srt_StatementScenarioAxis" xlink:to="srt_ScenarioUnspecifiedDomain_1" xlink:title="Definition : srt_StatementScenarioAxis to srt_ScenarioUnspecifiedDomain" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
  </link:definitionLink>
  <link:definitionLink xlink:type="extended" xlink:role="http://eveairmobility.com/role/FinancialInstrumentsDetails4">
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ForeignCurrencyFairValueHedgeDerivativeLineItems" xlink:label="us-gaap_ForeignCurrencyFairValueHedgeDerivativeLineItems" xlink:title="us-gaap_ForeignCurrencyFairValueHedgeDerivativeLineItems" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_ForeignCurrencyFairValueHedgeAssetLiabilityAtFairValue" xlink:label="evex_ForeignCurrencyFairValueHedgeAssetLiabilityAtFairValue" xlink:title="evex_ForeignCurrencyFairValueHedgeAssetLiabilityAtFairValue" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ForeignCurrencyFairValueHedgeDerivativeLineItems" xlink:to="evex_ForeignCurrencyFairValueHedgeAssetLiabilityAtFairValue" xlink:title="Definition : us-gaap_ForeignCurrencyFairValueHedgeDerivativeLineItems to evex_ForeignCurrencyFairValueHedgeAssetLiabilityAtFairValue" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_ForeignCurrencyFairValueHedgeLiabilityAssetAtFairValue" xlink:label="evex_ForeignCurrencyFairValueHedgeLiabilityAssetAtFairValue" xlink:title="evex_ForeignCurrencyFairValueHedgeLiabilityAssetAtFairValue" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ForeignCurrencyFairValueHedgeDerivativeLineItems" xlink:to="evex_ForeignCurrencyFairValueHedgeLiabilityAssetAtFairValue" xlink:title="Definition : us-gaap_ForeignCurrencyFairValueHedgeDerivativeLineItems to evex_ForeignCurrencyFairValueHedgeLiabilityAssetAtFairValue" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ForeignCurrencyFairValueHedgeDerivativeAtFairValueNet" xlink:label="us-gaap_ForeignCurrencyFairValueHedgeDerivativeAtFairValueNet" xlink:title="us-gaap_ForeignCurrencyFairValueHedgeDerivativeAtFairValueNet" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ForeignCurrencyFairValueHedgeDerivativeLineItems" xlink:to="us-gaap_ForeignCurrencyFairValueHedgeDerivativeAtFairValueNet" xlink:title="Definition : us-gaap_ForeignCurrencyFairValueHedgeDerivativeLineItems to us-gaap_ForeignCurrencyFairValueHedgeDerivativeAtFairValueNet" xlink:type="arc" use="optional" order="2" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ForeignCurrencyExchangeRateTranslation1" xlink:label="us-gaap_ForeignCurrencyExchangeRateTranslation1" xlink:title="us-gaap_ForeignCurrencyExchangeRateTranslation1" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ForeignCurrencyFairValueHedgeDerivativeLineItems" xlink:to="us-gaap_ForeignCurrencyExchangeRateTranslation1" xlink:title="Definition : us-gaap_ForeignCurrencyFairValueHedgeDerivativeLineItems to us-gaap_ForeignCurrencyExchangeRateTranslation1" xlink:type="arc" use="optional" order="3" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ForeignCurrencyFairValueHedgeDerivativeTable" xlink:label="us-gaap_ForeignCurrencyFairValueHedgeDerivativeTable" xlink:title="us-gaap_ForeignCurrencyFairValueHedgeDerivativeTable" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="us-gaap_ForeignCurrencyFairValueHedgeDerivativeLineItems" xlink:to="us-gaap_ForeignCurrencyFairValueHedgeDerivativeTable" xlink:title="Definition : us-gaap_ForeignCurrencyFairValueHedgeDerivativeLineItems to us-gaap_ForeignCurrencyFairValueHedgeDerivativeTable" xlink:type="arc" use="optional" order="4" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeInstrumentRiskAxis" xlink:label="us-gaap_DerivativeInstrumentRiskAxis" xlink:title="us-gaap_DerivativeInstrumentRiskAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ForeignCurrencyFairValueHedgeDerivativeTable" xlink:to="us-gaap_DerivativeInstrumentRiskAxis" xlink:title="Definition : us-gaap_ForeignCurrencyFairValueHedgeDerivativeTable to us-gaap_DerivativeInstrumentRiskAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeContractTypeDomain" xlink:label="us-gaap_DerivativeContractTypeDomain" xlink:title="us-gaap_DerivativeContractTypeDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_DerivativeInstrumentRiskAxis" xlink:to="us-gaap_DerivativeContractTypeDomain" xlink:title="Definition : us-gaap_DerivativeInstrumentRiskAxis to us-gaap_DerivativeContractTypeDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ForeignExchangeContractMember" xlink:label="us-gaap_ForeignExchangeContractMember" xlink:title="us-gaap_ForeignExchangeContractMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DerivativeContractTypeDomain" xlink:to="us-gaap_ForeignExchangeContractMember" xlink:title="Definition : us-gaap_DerivativeContractTypeDomain to us-gaap_ForeignExchangeContractMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeContractTypeDomain" xlink:label="us-gaap_DerivativeContractTypeDomain_1" xlink:title="us-gaap_DerivativeContractTypeDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_DerivativeInstrumentRiskAxis" xlink:to="us-gaap_DerivativeContractTypeDomain_1" xlink:title="Definition : us-gaap_DerivativeInstrumentRiskAxis to us-gaap_DerivativeContractTypeDomain" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_StatementScenarioAxis" xlink:label="srt_StatementScenarioAxis" xlink:title="srt_StatementScenarioAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ForeignCurrencyFairValueHedgeDerivativeTable" xlink:to="srt_StatementScenarioAxis" xlink:title="Definition : us-gaap_ForeignCurrencyFairValueHedgeDerivativeTable to srt_StatementScenarioAxis" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ScenarioUnspecifiedDomain" xlink:label="srt_ScenarioUnspecifiedDomain" xlink:title="srt_ScenarioUnspecifiedDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="srt_StatementScenarioAxis" xlink:to="srt_ScenarioUnspecifiedDomain" xlink:title="Definition : srt_StatementScenarioAxis to srt_ScenarioUnspecifiedDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_ProbableScenarioMinus50PercentageMember" xlink:label="evex_ProbableScenarioMinus50PercentageMember" xlink:title="evex_ProbableScenarioMinus50PercentageMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_ScenarioUnspecifiedDomain" xlink:to="evex_ProbableScenarioMinus50PercentageMember" xlink:title="Definition : srt_ScenarioUnspecifiedDomain to evex_ProbableScenarioMinus50PercentageMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_ProbableScenarioMinus25PercentageMember" xlink:label="evex_ProbableScenarioMinus25PercentageMember" xlink:title="evex_ProbableScenarioMinus25PercentageMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_ScenarioUnspecifiedDomain" xlink:to="evex_ProbableScenarioMinus25PercentageMember" xlink:title="Definition : srt_ScenarioUnspecifiedDomain to evex_ProbableScenarioMinus25PercentageMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_ProbableScenarioMember" xlink:label="evex_ProbableScenarioMember" xlink:title="evex_ProbableScenarioMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_ScenarioUnspecifiedDomain" xlink:to="evex_ProbableScenarioMember" xlink:title="Definition : srt_ScenarioUnspecifiedDomain to evex_ProbableScenarioMember" xlink:type="arc" use="optional" order="2" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_ProbableScenarioPlus25PercentageMember" xlink:label="evex_ProbableScenarioPlus25PercentageMember" xlink:title="evex_ProbableScenarioPlus25PercentageMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_ScenarioUnspecifiedDomain" xlink:to="evex_ProbableScenarioPlus25PercentageMember" xlink:title="Definition : srt_ScenarioUnspecifiedDomain to evex_ProbableScenarioPlus25PercentageMember" xlink:type="arc" use="optional" order="3" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_ProbableScenarioPlus50PercentageMember" xlink:label="evex_ProbableScenarioPlus50PercentageMember" xlink:title="evex_ProbableScenarioPlus50PercentageMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_ScenarioUnspecifiedDomain" xlink:to="evex_ProbableScenarioPlus50PercentageMember" xlink:title="Definition : srt_ScenarioUnspecifiedDomain to evex_ProbableScenarioPlus50PercentageMember" xlink:type="arc" use="optional" order="4" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ScenarioUnspecifiedDomain" xlink:label="srt_ScenarioUnspecifiedDomain_1" xlink:title="srt_ScenarioUnspecifiedDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="srt_StatementScenarioAxis" xlink:to="srt_ScenarioUnspecifiedDomain_1" xlink:title="Definition : srt_StatementScenarioAxis to srt_ScenarioUnspecifiedDomain" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BalanceSheetLocationAxis" xlink:label="us-gaap_BalanceSheetLocationAxis" xlink:title="us-gaap_BalanceSheetLocationAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ForeignCurrencyFairValueHedgeDerivativeTable" xlink:to="us-gaap_BalanceSheetLocationAxis" xlink:title="Definition : us-gaap_ForeignCurrencyFairValueHedgeDerivativeTable to us-gaap_BalanceSheetLocationAxis" xlink:type="arc" use="optional" order="2" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BalanceSheetLocationDomain" xlink:label="us-gaap_BalanceSheetLocationDomain" xlink:title="us-gaap_BalanceSheetLocationDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_BalanceSheetLocationAxis" xlink:to="us-gaap_BalanceSheetLocationDomain" xlink:title="Definition : us-gaap_BalanceSheetLocationAxis to us-gaap_BalanceSheetLocationDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashAndCashEquivalentsMember" xlink:label="us-gaap_CashAndCashEquivalentsMember" xlink:title="us-gaap_CashAndCashEquivalentsMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_BalanceSheetLocationDomain" xlink:to="us-gaap_CashAndCashEquivalentsMember" xlink:title="Definition : us-gaap_BalanceSheetLocationDomain to us-gaap_CashAndCashEquivalentsMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherAssetsMember" xlink:label="us-gaap_OtherAssetsMember" xlink:title="us-gaap_OtherAssetsMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_BalanceSheetLocationDomain" xlink:to="us-gaap_OtherAssetsMember" xlink:title="Definition : us-gaap_BalanceSheetLocationDomain to us-gaap_OtherAssetsMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherLiabilitiesMember" xlink:label="us-gaap_OtherLiabilitiesMember" xlink:title="us-gaap_OtherLiabilitiesMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_BalanceSheetLocationDomain" xlink:to="us-gaap_OtherLiabilitiesMember" xlink:title="Definition : us-gaap_BalanceSheetLocationDomain to us-gaap_OtherLiabilitiesMember" xlink:type="arc" use="optional" order="2" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BalanceSheetLocationDomain" xlink:label="us-gaap_BalanceSheetLocationDomain_1" xlink:title="us-gaap_BalanceSheetLocationDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_BalanceSheetLocationAxis" xlink:to="us-gaap_BalanceSheetLocationDomain_1" xlink:title="Definition : us-gaap_BalanceSheetLocationAxis to us-gaap_BalanceSheetLocationDomain" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
  </link:definitionLink>
  <link:definitionLink xlink:type="extended" xlink:role="http://eveairmobility.com/role/FinancialInstrumentsDetails5">
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems" xlink:label="us-gaap_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems" xlink:title="us-gaap_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputReconciliationTable" xlink:label="us-gaap_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputReconciliationTable" xlink:title="us-gaap_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputReconciliationTable" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="us-gaap_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems" xlink:to="us-gaap_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputReconciliationTable" xlink:title="Definition : us-gaap_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems to us-gaap_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputReconciliationTable" xlink:type="arc" use="optional" order="0" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeInstrumentRiskAxis" xlink:label="us-gaap_DerivativeInstrumentRiskAxis" xlink:title="us-gaap_DerivativeInstrumentRiskAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputReconciliationTable" xlink:to="us-gaap_DerivativeInstrumentRiskAxis" xlink:title="Definition : us-gaap_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputReconciliationTable to us-gaap_DerivativeInstrumentRiskAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeContractTypeDomain" xlink:label="us-gaap_DerivativeContractTypeDomain" xlink:title="us-gaap_DerivativeContractTypeDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_DerivativeInstrumentRiskAxis" xlink:to="us-gaap_DerivativeContractTypeDomain" xlink:title="Definition : us-gaap_DerivativeInstrumentRiskAxis to us-gaap_DerivativeContractTypeDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeMember" xlink:label="us-gaap_DerivativeMember" xlink:title="us-gaap_DerivativeMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DerivativeContractTypeDomain" xlink:to="us-gaap_DerivativeMember" xlink:title="Definition : us-gaap_DerivativeContractTypeDomain to us-gaap_DerivativeMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeContractTypeDomain" xlink:label="us-gaap_DerivativeContractTypeDomain_1" xlink:title="us-gaap_DerivativeContractTypeDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_DerivativeInstrumentRiskAxis" xlink:to="us-gaap_DerivativeContractTypeDomain_1" xlink:title="Definition : us-gaap_DerivativeInstrumentRiskAxis to us-gaap_DerivativeContractTypeDomain" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfWarrantOrRightAxis" xlink:label="us-gaap_ClassOfWarrantOrRightAxis" xlink:title="us-gaap_ClassOfWarrantOrRightAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputReconciliationTable" xlink:to="us-gaap_ClassOfWarrantOrRightAxis" xlink:title="Definition : us-gaap_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputReconciliationTable to us-gaap_ClassOfWarrantOrRightAxis" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfWarrantOrRightDomain" xlink:label="us-gaap_ClassOfWarrantOrRightDomain" xlink:title="us-gaap_ClassOfWarrantOrRightDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_ClassOfWarrantOrRightAxis" xlink:to="us-gaap_ClassOfWarrantOrRightDomain" xlink:title="Definition : us-gaap_ClassOfWarrantOrRightAxis to us-gaap_ClassOfWarrantOrRightDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_PrivatePlacementWarrantMember" xlink:label="evex_PrivatePlacementWarrantMember" xlink:title="evex_PrivatePlacementWarrantMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ClassOfWarrantOrRightDomain" xlink:to="evex_PrivatePlacementWarrantMember" xlink:title="Definition : us-gaap_ClassOfWarrantOrRightDomain to evex_PrivatePlacementWarrantMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfWarrantOrRightDomain" xlink:label="us-gaap_ClassOfWarrantOrRightDomain_1" xlink:title="us-gaap_ClassOfWarrantOrRightDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_ClassOfWarrantOrRightAxis" xlink:to="us-gaap_ClassOfWarrantOrRightDomain_1" xlink:title="Definition : us-gaap_ClassOfWarrantOrRightAxis to us-gaap_ClassOfWarrantOrRightDomain" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_StatementScenarioAxis" xlink:label="srt_StatementScenarioAxis" xlink:title="srt_StatementScenarioAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputReconciliationTable" xlink:to="srt_StatementScenarioAxis" xlink:title="Definition : us-gaap_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputReconciliationTable to srt_StatementScenarioAxis" xlink:type="arc" use="optional" order="2" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ScenarioUnspecifiedDomain" xlink:label="srt_ScenarioUnspecifiedDomain" xlink:title="srt_ScenarioUnspecifiedDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="srt_StatementScenarioAxis" xlink:to="srt_ScenarioUnspecifiedDomain" xlink:title="Definition : srt_StatementScenarioAxis to srt_ScenarioUnspecifiedDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_ProbableScenarioMinus50PercentageMember" xlink:label="evex_ProbableScenarioMinus50PercentageMember" xlink:title="evex_ProbableScenarioMinus50PercentageMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_ScenarioUnspecifiedDomain" xlink:to="evex_ProbableScenarioMinus50PercentageMember" xlink:title="Definition : srt_ScenarioUnspecifiedDomain to evex_ProbableScenarioMinus50PercentageMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_ProbableScenarioMinus25PercentageMember" xlink:label="evex_ProbableScenarioMinus25PercentageMember" xlink:title="evex_ProbableScenarioMinus25PercentageMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_ScenarioUnspecifiedDomain" xlink:to="evex_ProbableScenarioMinus25PercentageMember" xlink:title="Definition : srt_ScenarioUnspecifiedDomain to evex_ProbableScenarioMinus25PercentageMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_ProbableScenarioMember" xlink:label="evex_ProbableScenarioMember" xlink:title="evex_ProbableScenarioMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_ScenarioUnspecifiedDomain" xlink:to="evex_ProbableScenarioMember" xlink:title="Definition : srt_ScenarioUnspecifiedDomain to evex_ProbableScenarioMember" xlink:type="arc" use="optional" order="2" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_ProbableScenarioPlus25PercentageMember" xlink:label="evex_ProbableScenarioPlus25PercentageMember" xlink:title="evex_ProbableScenarioPlus25PercentageMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_ScenarioUnspecifiedDomain" xlink:to="evex_ProbableScenarioPlus25PercentageMember" xlink:title="Definition : srt_ScenarioUnspecifiedDomain to evex_ProbableScenarioPlus25PercentageMember" xlink:type="arc" use="optional" order="3" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_ProbableScenarioPlus50PercentageMember" xlink:label="evex_ProbableScenarioPlus50PercentageMember" xlink:title="evex_ProbableScenarioPlus50PercentageMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_ScenarioUnspecifiedDomain" xlink:to="evex_ProbableScenarioPlus50PercentageMember" xlink:title="Definition : srt_ScenarioUnspecifiedDomain to evex_ProbableScenarioPlus50PercentageMember" xlink:type="arc" use="optional" order="4" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ScenarioUnspecifiedDomain" xlink:label="srt_ScenarioUnspecifiedDomain_1" xlink:title="srt_ScenarioUnspecifiedDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="srt_StatementScenarioAxis" xlink:to="srt_ScenarioUnspecifiedDomain_1" xlink:title="Definition : srt_StatementScenarioAxis to srt_ScenarioUnspecifiedDomain" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
  </link:definitionLink>
  <link:definitionLink xlink:type="extended" xlink:role="http://eveairmobility.com/role/FinancialInstrumentsDetails6Textuals">
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ForeignCurrencyFairValueHedgeDerivativeLineItems" xlink:label="us-gaap_ForeignCurrencyFairValueHedgeDerivativeLineItems" xlink:title="us-gaap_ForeignCurrencyFairValueHedgeDerivativeLineItems" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_NumberOfCurrencies" xlink:label="evex_NumberOfCurrencies" xlink:title="evex_NumberOfCurrencies" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ForeignCurrencyFairValueHedgeDerivativeLineItems" xlink:to="evex_NumberOfCurrencies" xlink:title="Definition : us-gaap_ForeignCurrencyFairValueHedgeDerivativeLineItems to evex_NumberOfCurrencies" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_MinimumPercentageOfPositiveAndNegativeVariationsInRiskVariable" xlink:label="evex_MinimumPercentageOfPositiveAndNegativeVariationsInRiskVariable" xlink:title="evex_MinimumPercentageOfPositiveAndNegativeVariationsInRiskVariable" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ForeignCurrencyFairValueHedgeDerivativeLineItems" xlink:to="evex_MinimumPercentageOfPositiveAndNegativeVariationsInRiskVariable" xlink:title="Definition : us-gaap_ForeignCurrencyFairValueHedgeDerivativeLineItems to evex_MinimumPercentageOfPositiveAndNegativeVariationsInRiskVariable" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_MaximumPercentageOfPositiveAndNegativeVariationsInRiskVariable" xlink:label="evex_MaximumPercentageOfPositiveAndNegativeVariationsInRiskVariable" xlink:title="evex_MaximumPercentageOfPositiveAndNegativeVariationsInRiskVariable" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ForeignCurrencyFairValueHedgeDerivativeLineItems" xlink:to="evex_MaximumPercentageOfPositiveAndNegativeVariationsInRiskVariable" xlink:title="Definition : us-gaap_ForeignCurrencyFairValueHedgeDerivativeLineItems to evex_MaximumPercentageOfPositiveAndNegativeVariationsInRiskVariable" xlink:type="arc" use="optional" order="2" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ForeignCurrencyFairValueHedgeDerivativeTable" xlink:label="us-gaap_ForeignCurrencyFairValueHedgeDerivativeTable" xlink:title="us-gaap_ForeignCurrencyFairValueHedgeDerivativeTable" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="us-gaap_ForeignCurrencyFairValueHedgeDerivativeLineItems" xlink:to="us-gaap_ForeignCurrencyFairValueHedgeDerivativeTable" xlink:title="Definition : us-gaap_ForeignCurrencyFairValueHedgeDerivativeLineItems to us-gaap_ForeignCurrencyFairValueHedgeDerivativeTable" xlink:type="arc" use="optional" order="3" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeInstrumentRiskAxis" xlink:label="us-gaap_DerivativeInstrumentRiskAxis" xlink:title="us-gaap_DerivativeInstrumentRiskAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ForeignCurrencyFairValueHedgeDerivativeTable" xlink:to="us-gaap_DerivativeInstrumentRiskAxis" xlink:title="Definition : us-gaap_ForeignCurrencyFairValueHedgeDerivativeTable to us-gaap_DerivativeInstrumentRiskAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeContractTypeDomain" xlink:label="us-gaap_DerivativeContractTypeDomain" xlink:title="us-gaap_DerivativeContractTypeDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_DerivativeInstrumentRiskAxis" xlink:to="us-gaap_DerivativeContractTypeDomain" xlink:title="Definition : us-gaap_DerivativeInstrumentRiskAxis to us-gaap_DerivativeContractTypeDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ForeignExchangeContractMember" xlink:label="us-gaap_ForeignExchangeContractMember" xlink:title="us-gaap_ForeignExchangeContractMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DerivativeContractTypeDomain" xlink:to="us-gaap_ForeignExchangeContractMember" xlink:title="Definition : us-gaap_DerivativeContractTypeDomain to us-gaap_ForeignExchangeContractMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_InterbankDepositCertificateMember" xlink:label="evex_InterbankDepositCertificateMember" xlink:title="evex_InterbankDepositCertificateMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DerivativeContractTypeDomain" xlink:to="evex_InterbankDepositCertificateMember" xlink:title="Definition : us-gaap_DerivativeContractTypeDomain to evex_InterbankDepositCertificateMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeContractTypeDomain" xlink:label="us-gaap_DerivativeContractTypeDomain_1" xlink:title="us-gaap_DerivativeContractTypeDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_DerivativeInstrumentRiskAxis" xlink:to="us-gaap_DerivativeContractTypeDomain_1" xlink:title="Definition : us-gaap_DerivativeInstrumentRiskAxis to us-gaap_DerivativeContractTypeDomain" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_StatementScenarioAxis" xlink:label="srt_StatementScenarioAxis" xlink:title="srt_StatementScenarioAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ForeignCurrencyFairValueHedgeDerivativeTable" xlink:to="srt_StatementScenarioAxis" xlink:title="Definition : us-gaap_ForeignCurrencyFairValueHedgeDerivativeTable to srt_StatementScenarioAxis" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ScenarioUnspecifiedDomain" xlink:label="srt_ScenarioUnspecifiedDomain" xlink:title="srt_ScenarioUnspecifiedDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="srt_StatementScenarioAxis" xlink:to="srt_ScenarioUnspecifiedDomain" xlink:title="Definition : srt_StatementScenarioAxis to srt_ScenarioUnspecifiedDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_ProbableScenarioMember" xlink:label="evex_ProbableScenarioMember" xlink:title="evex_ProbableScenarioMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_ScenarioUnspecifiedDomain" xlink:to="evex_ProbableScenarioMember" xlink:title="Definition : srt_ScenarioUnspecifiedDomain to evex_ProbableScenarioMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ScenarioUnspecifiedDomain" xlink:label="srt_ScenarioUnspecifiedDomain_1" xlink:title="srt_ScenarioUnspecifiedDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="srt_StatementScenarioAxis" xlink:to="srt_ScenarioUnspecifiedDomain_1" xlink:title="Definition : srt_StatementScenarioAxis to srt_ScenarioUnspecifiedDomain" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfWarrantOrRightAxis" xlink:label="us-gaap_ClassOfWarrantOrRightAxis" xlink:title="us-gaap_ClassOfWarrantOrRightAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ForeignCurrencyFairValueHedgeDerivativeTable" xlink:to="us-gaap_ClassOfWarrantOrRightAxis" xlink:title="Definition : us-gaap_ForeignCurrencyFairValueHedgeDerivativeTable to us-gaap_ClassOfWarrantOrRightAxis" xlink:type="arc" use="optional" order="2" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfWarrantOrRightDomain" xlink:label="us-gaap_ClassOfWarrantOrRightDomain" xlink:title="us-gaap_ClassOfWarrantOrRightDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_ClassOfWarrantOrRightAxis" xlink:to="us-gaap_ClassOfWarrantOrRightDomain" xlink:title="Definition : us-gaap_ClassOfWarrantOrRightAxis to us-gaap_ClassOfWarrantOrRightDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_PrivatePlacementWarrantMember" xlink:label="evex_PrivatePlacementWarrantMember" xlink:title="evex_PrivatePlacementWarrantMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ClassOfWarrantOrRightDomain" xlink:to="evex_PrivatePlacementWarrantMember" xlink:title="Definition : us-gaap_ClassOfWarrantOrRightDomain to evex_PrivatePlacementWarrantMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfWarrantOrRightDomain" xlink:label="us-gaap_ClassOfWarrantOrRightDomain_1" xlink:title="us-gaap_ClassOfWarrantOrRightDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_ClassOfWarrantOrRightAxis" xlink:to="us-gaap_ClassOfWarrantOrRightDomain_1" xlink:title="Definition : us-gaap_ClassOfWarrantOrRightAxis to us-gaap_ClassOfWarrantOrRightDomain" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
  </link:definitionLink>
  <link:definitionLink xlink:type="extended" xlink:role="http://eveairmobility.com/role/LiquidityDetails">
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_DisclosureOfLiquidityLineItems" xlink:label="evex_DisclosureOfLiquidityLineItems" xlink:title="evex_DisclosureOfLiquidityLineItems" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_DisclosureOfLiquidityTable" xlink:label="evex_DisclosureOfLiquidityTable" xlink:title="evex_DisclosureOfLiquidityTable" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="evex_DisclosureOfLiquidityLineItems" xlink:to="evex_DisclosureOfLiquidityTable" xlink:title="Definition : evex_DisclosureOfLiquidityLineItems to evex_DisclosureOfLiquidityTable" xlink:type="arc" use="optional" order="0" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeAxis" xlink:label="srt_RangeAxis" xlink:title="srt_RangeAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="evex_DisclosureOfLiquidityTable" xlink:to="srt_RangeAxis" xlink:title="Definition : evex_DisclosureOfLiquidityTable to srt_RangeAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeMember" xlink:label="srt_RangeMember" xlink:title="srt_RangeMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="srt_RangeAxis" xlink:to="srt_RangeMember" xlink:title="Definition : srt_RangeAxis to srt_RangeMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_MinimumMember" xlink:label="srt_MinimumMember" xlink:title="srt_MinimumMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_RangeMember" xlink:to="srt_MinimumMember" xlink:title="Definition : srt_RangeMember to srt_MinimumMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeMember" xlink:label="srt_RangeMember_1" xlink:title="srt_RangeMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="srt_RangeAxis" xlink:to="srt_RangeMember_1" xlink:title="Definition : srt_RangeAxis to srt_RangeMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
  </link:definitionLink>
  <link:definitionLink xlink:type="extended" xlink:role="http://eveairmobility.com/role/SellingGeneralandAdministrativeExpensesDetails1Textuals">
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_ScheduleOfSellingGeneralAndAdministrativeExpenseLineItems" xlink:label="evex_ScheduleOfSellingGeneralAndAdministrativeExpenseLineItems" xlink:title="evex_ScheduleOfSellingGeneralAndAdministrativeExpenseLineItems" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CostOfRevenue" xlink:label="us-gaap_CostOfRevenue" xlink:title="us-gaap_CostOfRevenue" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="evex_ScheduleOfSellingGeneralAndAdministrativeExpenseLineItems" xlink:to="us-gaap_CostOfRevenue" xlink:title="Definition : evex_ScheduleOfSellingGeneralAndAdministrativeExpenseLineItems to us-gaap_CostOfRevenue" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_ScheduleOfSellingGeneralAndAdministrativeExpenseTable" xlink:label="evex_ScheduleOfSellingGeneralAndAdministrativeExpenseTable" xlink:title="evex_ScheduleOfSellingGeneralAndAdministrativeExpenseTable" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="evex_ScheduleOfSellingGeneralAndAdministrativeExpenseLineItems" xlink:to="evex_ScheduleOfSellingGeneralAndAdministrativeExpenseTable" xlink:title="Definition : evex_ScheduleOfSellingGeneralAndAdministrativeExpenseLineItems to evex_ScheduleOfSellingGeneralAndAdministrativeExpenseTable" xlink:type="arc" use="optional" order="1" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeStatementLocationAxis" xlink:label="us-gaap_IncomeStatementLocationAxis" xlink:title="us-gaap_IncomeStatementLocationAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="evex_ScheduleOfSellingGeneralAndAdministrativeExpenseTable" xlink:to="us-gaap_IncomeStatementLocationAxis" xlink:title="Definition : evex_ScheduleOfSellingGeneralAndAdministrativeExpenseTable to us-gaap_IncomeStatementLocationAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeStatementLocationDomain" xlink:label="us-gaap_IncomeStatementLocationDomain" xlink:title="us-gaap_IncomeStatementLocationDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_IncomeStatementLocationAxis" xlink:to="us-gaap_IncomeStatementLocationDomain" xlink:title="Definition : us-gaap_IncomeStatementLocationAxis to us-gaap_IncomeStatementLocationDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SellingGeneralAndAdministrativeExpensesMember" xlink:label="us-gaap_SellingGeneralAndAdministrativeExpensesMember" xlink:title="us-gaap_SellingGeneralAndAdministrativeExpensesMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_IncomeStatementLocationDomain" xlink:to="us-gaap_SellingGeneralAndAdministrativeExpensesMember" xlink:title="Definition : us-gaap_IncomeStatementLocationDomain to us-gaap_SellingGeneralAndAdministrativeExpensesMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeStatementLocationDomain" xlink:label="us-gaap_IncomeStatementLocationDomain_1" xlink:title="us-gaap_IncomeStatementLocationDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_IncomeStatementLocationAxis" xlink:to="us-gaap_IncomeStatementLocationDomain_1" xlink:title="Definition : us-gaap_IncomeStatementLocationAxis to us-gaap_IncomeStatementLocationDomain" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionAxis" xlink:label="us-gaap_RelatedPartyTransactionAxis" xlink:title="us-gaap_RelatedPartyTransactionAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="evex_ScheduleOfSellingGeneralAndAdministrativeExpenseTable" xlink:to="us-gaap_RelatedPartyTransactionAxis" xlink:title="Definition : evex_ScheduleOfSellingGeneralAndAdministrativeExpenseTable to us-gaap_RelatedPartyTransactionAxis" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionDomain" xlink:label="us-gaap_RelatedPartyTransactionDomain" xlink:title="us-gaap_RelatedPartyTransactionDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_RelatedPartyTransactionAxis" xlink:to="us-gaap_RelatedPartyTransactionDomain" xlink:title="Definition : us-gaap_RelatedPartyTransactionAxis to us-gaap_RelatedPartyTransactionDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_SharedServiceAgreementMember" xlink:label="evex_SharedServiceAgreementMember" xlink:title="evex_SharedServiceAgreementMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyTransactionDomain" xlink:to="evex_SharedServiceAgreementMember" xlink:title="Definition : us-gaap_RelatedPartyTransactionDomain to evex_SharedServiceAgreementMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionDomain" xlink:label="us-gaap_RelatedPartyTransactionDomain_1" xlink:title="us-gaap_RelatedPartyTransactionDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_RelatedPartyTransactionAxis" xlink:to="us-gaap_RelatedPartyTransactionDomain_1" xlink:title="Definition : us-gaap_RelatedPartyTransactionAxis to us-gaap_RelatedPartyTransactionDomain" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:label="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:title="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="evex_ScheduleOfSellingGeneralAndAdministrativeExpenseTable" xlink:to="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:title="Definition : evex_ScheduleOfSellingGeneralAndAdministrativeExpenseTable to us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:type="arc" use="optional" order="2" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain" xlink:label="us-gaap_RelatedPartyDomain" xlink:title="us-gaap_RelatedPartyDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:to="us-gaap_RelatedPartyDomain" xlink:title="Definition : us-gaap_RelatedPartyTransactionsByRelatedPartyAxis to us-gaap_RelatedPartyDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyMember" xlink:label="us-gaap_RelatedPartyMember" xlink:title="us-gaap_RelatedPartyMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyDomain" xlink:to="us-gaap_RelatedPartyMember" xlink:title="Definition : us-gaap_RelatedPartyDomain to us-gaap_RelatedPartyMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain" xlink:label="us-gaap_RelatedPartyDomain_1" xlink:title="us-gaap_RelatedPartyDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:to="us-gaap_RelatedPartyDomain_1" xlink:title="Definition : us-gaap_RelatedPartyTransactionsByRelatedPartyAxis to us-gaap_RelatedPartyDomain" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
  </link:definitionLink>
  <link:definitionLink xlink:type="extended" xlink:role="http://eveairmobility.com/role/StockholdersequityDetails1">
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems" xlink:title="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_WarrantsAndRightsOutstandingValuationTechniqueExtensibleList" xlink:label="us-gaap_WarrantsAndRightsOutstandingValuationTechniqueExtensibleList" xlink:title="us-gaap_WarrantsAndRightsOutstandingValuationTechniqueExtensibleList" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems" xlink:to="us-gaap_WarrantsAndRightsOutstandingValuationTechniqueExtensibleList" xlink:title="Definition : us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems to us-gaap_WarrantsAndRightsOutstandingValuationTechniqueExtensibleList" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable" xlink:title="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems" xlink:to="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable" xlink:title="Definition : us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems to us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable" xlink:type="arc" use="optional" order="1" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancialInstrumentAxis" xlink:label="us-gaap_FinancialInstrumentAxis" xlink:title="us-gaap_FinancialInstrumentAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable" xlink:to="us-gaap_FinancialInstrumentAxis" xlink:title="Definition : us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable to us-gaap_FinancialInstrumentAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain" xlink:label="us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain" xlink:title="us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_FinancialInstrumentAxis" xlink:to="us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain" xlink:title="Definition : us-gaap_FinancialInstrumentAxis to us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_StrategicWarrantsOneMember" xlink:label="evex_StrategicWarrantsOneMember" xlink:title="evex_StrategicWarrantsOneMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain" xlink:to="evex_StrategicWarrantsOneMember" xlink:title="Definition : us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain to evex_StrategicWarrantsOneMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_StrategicWarrantsTwoMember" xlink:label="evex_StrategicWarrantsTwoMember" xlink:title="evex_StrategicWarrantsTwoMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain" xlink:to="evex_StrategicWarrantsTwoMember" xlink:title="Definition : us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain to evex_StrategicWarrantsTwoMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_StrategicWarrantsThreeMember" xlink:label="evex_StrategicWarrantsThreeMember" xlink:title="evex_StrategicWarrantsThreeMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain" xlink:to="evex_StrategicWarrantsThreeMember" xlink:title="Definition : us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain to evex_StrategicWarrantsThreeMember" xlink:type="arc" use="optional" order="2" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain" xlink:label="us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_1" xlink:title="us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_FinancialInstrumentAxis" xlink:to="us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_1" xlink:title="Definition : us-gaap_FinancialInstrumentAxis to us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_ClassOfStrategicWarrantsAxis" xlink:label="evex_ClassOfStrategicWarrantsAxis" xlink:title="evex_ClassOfStrategicWarrantsAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable" xlink:to="evex_ClassOfStrategicWarrantsAxis" xlink:title="Definition : us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable to evex_ClassOfStrategicWarrantsAxis" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_ClassOfStrategicWarrantsDomain" xlink:label="evex_ClassOfStrategicWarrantsDomain" xlink:title="evex_ClassOfStrategicWarrantsDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="evex_ClassOfStrategicWarrantsAxis" xlink:to="evex_ClassOfStrategicWarrantsDomain" xlink:title="Definition : evex_ClassOfStrategicWarrantsAxis to evex_ClassOfStrategicWarrantsDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_StrategicPennyWarrantsMember" xlink:label="evex_StrategicPennyWarrantsMember" xlink:title="evex_StrategicPennyWarrantsMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="evex_ClassOfStrategicWarrantsDomain" xlink:to="evex_StrategicPennyWarrantsMember" xlink:title="Definition : evex_ClassOfStrategicWarrantsDomain to evex_StrategicPennyWarrantsMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_StrategicMarketWarrantsMember" xlink:label="evex_StrategicMarketWarrantsMember" xlink:title="evex_StrategicMarketWarrantsMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="evex_ClassOfStrategicWarrantsDomain" xlink:to="evex_StrategicMarketWarrantsMember" xlink:title="Definition : evex_ClassOfStrategicWarrantsDomain to evex_StrategicMarketWarrantsMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_ClassOfStrategicWarrantsDomain" xlink:label="evex_ClassOfStrategicWarrantsDomain_1" xlink:title="evex_ClassOfStrategicWarrantsDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="evex_ClassOfStrategicWarrantsAxis" xlink:to="evex_ClassOfStrategicWarrantsDomain_1" xlink:title="Definition : evex_ClassOfStrategicWarrantsAxis to evex_ClassOfStrategicWarrantsDomain" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MeasurementInputTypeAxis" xlink:label="us-gaap_MeasurementInputTypeAxis" xlink:title="us-gaap_MeasurementInputTypeAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable" xlink:to="us-gaap_MeasurementInputTypeAxis" xlink:title="Definition : us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable to us-gaap_MeasurementInputTypeAxis" xlink:type="arc" use="optional" order="2" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MeasurementInputTypeDomain" xlink:label="us-gaap_MeasurementInputTypeDomain" xlink:title="us-gaap_MeasurementInputTypeDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_MeasurementInputTypeAxis" xlink:to="us-gaap_MeasurementInputTypeDomain" xlink:title="Definition : us-gaap_MeasurementInputTypeAxis to us-gaap_MeasurementInputTypeDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MeasurementInputSharePriceMember" xlink:label="us-gaap_MeasurementInputSharePriceMember" xlink:title="us-gaap_MeasurementInputSharePriceMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_MeasurementInputTypeDomain" xlink:to="us-gaap_MeasurementInputSharePriceMember" xlink:title="Definition : us-gaap_MeasurementInputTypeDomain to us-gaap_MeasurementInputSharePriceMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MeasurementInputMaturityMember" xlink:label="us-gaap_MeasurementInputMaturityMember" xlink:title="us-gaap_MeasurementInputMaturityMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_MeasurementInputTypeDomain" xlink:to="us-gaap_MeasurementInputMaturityMember" xlink:title="Definition : us-gaap_MeasurementInputTypeDomain to us-gaap_MeasurementInputMaturityMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MeasurementInputExpectedTermMember" xlink:label="us-gaap_MeasurementInputExpectedTermMember" xlink:title="us-gaap_MeasurementInputExpectedTermMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_MeasurementInputTypeDomain" xlink:to="us-gaap_MeasurementInputExpectedTermMember" xlink:title="Definition : us-gaap_MeasurementInputTypeDomain to us-gaap_MeasurementInputExpectedTermMember" xlink:type="arc" use="optional" order="2" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MeasurementInputExercisePriceMember" xlink:label="us-gaap_MeasurementInputExercisePriceMember" xlink:title="us-gaap_MeasurementInputExercisePriceMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_MeasurementInputTypeDomain" xlink:to="us-gaap_MeasurementInputExercisePriceMember" xlink:title="Definition : us-gaap_MeasurementInputTypeDomain to us-gaap_MeasurementInputExercisePriceMember" xlink:type="arc" use="optional" order="3" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MeasurementInputRiskFreeInterestRateMember" xlink:label="us-gaap_MeasurementInputRiskFreeInterestRateMember" xlink:title="us-gaap_MeasurementInputRiskFreeInterestRateMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_MeasurementInputTypeDomain" xlink:to="us-gaap_MeasurementInputRiskFreeInterestRateMember" xlink:title="Definition : us-gaap_MeasurementInputTypeDomain to us-gaap_MeasurementInputRiskFreeInterestRateMember" xlink:type="arc" use="optional" order="4" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MeasurementInputOptionVolatilityMember" xlink:label="us-gaap_MeasurementInputOptionVolatilityMember" xlink:title="us-gaap_MeasurementInputOptionVolatilityMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_MeasurementInputTypeDomain" xlink:to="us-gaap_MeasurementInputOptionVolatilityMember" xlink:title="Definition : us-gaap_MeasurementInputTypeDomain to us-gaap_MeasurementInputOptionVolatilityMember" xlink:type="arc" use="optional" order="5" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MeasurementInputExpectedDividendRateMember" xlink:label="us-gaap_MeasurementInputExpectedDividendRateMember" xlink:title="us-gaap_MeasurementInputExpectedDividendRateMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_MeasurementInputTypeDomain" xlink:to="us-gaap_MeasurementInputExpectedDividendRateMember" xlink:title="Definition : us-gaap_MeasurementInputTypeDomain to us-gaap_MeasurementInputExpectedDividendRateMember" xlink:type="arc" use="optional" order="6" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_MeasurementInputGrantDateFairValueMember" xlink:label="evex_MeasurementInputGrantDateFairValueMember" xlink:title="evex_MeasurementInputGrantDateFairValueMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_MeasurementInputTypeDomain" xlink:to="evex_MeasurementInputGrantDateFairValueMember" xlink:title="Definition : us-gaap_MeasurementInputTypeDomain to evex_MeasurementInputGrantDateFairValueMember" xlink:type="arc" use="optional" order="7" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MeasurementInputTypeDomain" xlink:label="us-gaap_MeasurementInputTypeDomain_1" xlink:title="us-gaap_MeasurementInputTypeDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_MeasurementInputTypeAxis" xlink:to="us-gaap_MeasurementInputTypeDomain_1" xlink:title="Definition : us-gaap_MeasurementInputTypeAxis to us-gaap_MeasurementInputTypeDomain" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ValuationTechniqueAxis" xlink:label="us-gaap_ValuationTechniqueAxis" xlink:title="us-gaap_ValuationTechniqueAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable" xlink:to="us-gaap_ValuationTechniqueAxis" xlink:title="Definition : us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable to us-gaap_ValuationTechniqueAxis" xlink:type="arc" use="optional" order="3" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ValuationTechniqueDomain" xlink:label="us-gaap_ValuationTechniqueDomain" xlink:title="us-gaap_ValuationTechniqueDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_ValuationTechniqueAxis" xlink:to="us-gaap_ValuationTechniqueDomain" xlink:title="Definition : us-gaap_ValuationTechniqueAxis to us-gaap_ValuationTechniqueDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ValuationTechniqueOptionPricingModelMember" xlink:label="us-gaap_ValuationTechniqueOptionPricingModelMember" xlink:title="us-gaap_ValuationTechniqueOptionPricingModelMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ValuationTechniqueDomain" xlink:to="us-gaap_ValuationTechniqueOptionPricingModelMember" xlink:title="Definition : us-gaap_ValuationTechniqueDomain to us-gaap_ValuationTechniqueOptionPricingModelMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ValuationTechniqueDomain" xlink:label="us-gaap_ValuationTechniqueDomain_1" xlink:title="us-gaap_ValuationTechniqueDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_ValuationTechniqueAxis" xlink:to="us-gaap_ValuationTechniqueDomain_1" xlink:title="Definition : us-gaap_ValuationTechniqueAxis to us-gaap_ValuationTechniqueDomain" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
  </link:definitionLink>
  <link:definitionLink xlink:type="extended" xlink:role="http://fasb.org/us-gaap/role/eedm/ExtensibleEnumerationLists">
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ValuationTechniqueDomain" xlink:label="us-gaap_ValuationTechniqueDomain" xlink:title="us-gaap_ValuationTechniqueDomain" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeApproachValuationTechniqueMember" xlink:label="us-gaap_IncomeApproachValuationTechniqueMember" xlink:title="us-gaap_IncomeApproachValuationTechniqueMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ValuationTechniqueDomain" xlink:to="us-gaap_IncomeApproachValuationTechniqueMember" xlink:title="Definition : us-gaap_ValuationTechniqueDomain to us-gaap_IncomeApproachValuationTechniqueMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ValuationTechniqueOptionPricingModelMember" xlink:label="us-gaap_ValuationTechniqueOptionPricingModelMember" xlink:title="us-gaap_ValuationTechniqueOptionPricingModelMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_IncomeApproachValuationTechniqueMember" xlink:to="us-gaap_ValuationTechniqueOptionPricingModelMember" xlink:title="Definition : us-gaap_IncomeApproachValuationTechniqueMember to us-gaap_ValuationTechniqueOptionPricingModelMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_VariableRateDomain" xlink:label="us-gaap_VariableRateDomain" xlink:title="us-gaap_VariableRateDomain" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BaseRateMember" xlink:label="us-gaap_BaseRateMember" xlink:title="us-gaap_BaseRateMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_VariableRateDomain" xlink:to="us-gaap_BaseRateMember" xlink:title="Definition : us-gaap_VariableRateDomain to us-gaap_BaseRateMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LiabilitiesCurrentAbstract" xlink:label="us-gaap_LiabilitiesCurrentAbstract" xlink:title="us-gaap_LiabilitiesCurrentAbstract" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherLiabilitiesCurrent" xlink:label="us-gaap_OtherLiabilitiesCurrent" xlink:title="us-gaap_OtherLiabilitiesCurrent" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_LiabilitiesCurrentAbstract" xlink:to="us-gaap_OtherLiabilitiesCurrent" xlink:title="Definition : us-gaap_LiabilitiesCurrentAbstract to us-gaap_OtherLiabilitiesCurrent" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LiabilitiesNoncurrentAbstract" xlink:label="us-gaap_LiabilitiesNoncurrentAbstract" xlink:title="us-gaap_LiabilitiesNoncurrentAbstract" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherLiabilitiesNoncurrent" xlink:label="us-gaap_OtherLiabilitiesNoncurrent" xlink:title="us-gaap_OtherLiabilitiesNoncurrent" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_LiabilitiesNoncurrentAbstract" xlink:to="us-gaap_OtherLiabilitiesNoncurrent" xlink:title="Definition : us-gaap_LiabilitiesNoncurrentAbstract to us-gaap_OtherLiabilitiesNoncurrent" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LiabilitiesAbstract" xlink:label="us-gaap_LiabilitiesAbstract" xlink:title="us-gaap_LiabilitiesAbstract" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherLiabilities" xlink:label="us-gaap_OtherLiabilities" xlink:title="us-gaap_OtherLiabilities" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_LiabilitiesAbstract" xlink:to="us-gaap_OtherLiabilities" xlink:title="Definition : us-gaap_LiabilitiesAbstract to us-gaap_OtherLiabilities" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeLiabilitiesCurrent" xlink:label="us-gaap_DerivativeLiabilitiesCurrent" xlink:title="us-gaap_DerivativeLiabilitiesCurrent" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_LiabilitiesAbstract" xlink:to="us-gaap_DerivativeLiabilitiesCurrent" xlink:title="Definition : us-gaap_LiabilitiesAbstract to us-gaap_DerivativeLiabilitiesCurrent" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
  </link:definitionLink>
  <link:definitionLink xlink:type="extended" xlink:role="http://eveairmobility.com/role/DerivativeFinancialInstrumentsDerivativeInstrumentsGainLossDetails">
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeInstrumentsGainLossLineItems" xlink:label="us-gaap_DerivativeInstrumentsGainLossLineItems" xlink:title="us-gaap_DerivativeInstrumentsGainLossLineItems" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherComprehensiveIncomeLossDerivativeExcludedComponentIncreaseDecreaseAfterAdjustmentsAndTax" xlink:label="us-gaap_OtherComprehensiveIncomeLossDerivativeExcludedComponentIncreaseDecreaseAfterAdjustmentsAndTax" xlink:title="us-gaap_OtherComprehensiveIncomeLossDerivativeExcludedComponentIncreaseDecreaseAfterAdjustmentsAndTax" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DerivativeInstrumentsGainLossLineItems" xlink:to="us-gaap_OtherComprehensiveIncomeLossDerivativeExcludedComponentIncreaseDecreaseAfterAdjustmentsAndTax" xlink:title="Definition : us-gaap_DerivativeInstrumentsGainLossLineItems to us-gaap_OtherComprehensiveIncomeLossDerivativeExcludedComponentIncreaseDecreaseAfterAdjustmentsAndTax" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable" xlink:label="us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable" xlink:title="us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="us-gaap_DerivativeInstrumentsGainLossLineItems" xlink:to="us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable" xlink:title="Definition : us-gaap_DerivativeInstrumentsGainLossLineItems to us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable" xlink:type="arc" use="optional" order="1" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeStatementLocationAxis" xlink:label="us-gaap_IncomeStatementLocationAxis" xlink:title="us-gaap_IncomeStatementLocationAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable" xlink:to="us-gaap_IncomeStatementLocationAxis" xlink:title="Definition : us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable to us-gaap_IncomeStatementLocationAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeStatementLocationDomain" xlink:label="us-gaap_IncomeStatementLocationDomain" xlink:title="us-gaap_IncomeStatementLocationDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_IncomeStatementLocationAxis" xlink:to="us-gaap_IncomeStatementLocationDomain" xlink:title="Definition : us-gaap_IncomeStatementLocationAxis to us-gaap_IncomeStatementLocationDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GeneralAndAdministrativeExpenseMember" xlink:label="us-gaap_GeneralAndAdministrativeExpenseMember" xlink:title="us-gaap_GeneralAndAdministrativeExpenseMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_IncomeStatementLocationDomain" xlink:to="us-gaap_GeneralAndAdministrativeExpenseMember" xlink:title="Definition : us-gaap_IncomeStatementLocationDomain to us-gaap_GeneralAndAdministrativeExpenseMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeStatementLocationDomain" xlink:label="us-gaap_IncomeStatementLocationDomain_1" xlink:title="us-gaap_IncomeStatementLocationDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_IncomeStatementLocationAxis" xlink:to="us-gaap_IncomeStatementLocationDomain_1" xlink:title="Definition : us-gaap_IncomeStatementLocationAxis to us-gaap_IncomeStatementLocationDomain" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
  </link:definitionLink>
  <link:definitionLink xlink:type="extended" xlink:role="http://eveairmobility.com/role/OrganizationandBasisofPresentationDetails">
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_DisclosureOfGeneralInformationAboutEntityLineItems" xlink:label="evex_DisclosureOfGeneralInformationAboutEntityLineItems" xlink:title="evex_DisclosureOfGeneralInformationAboutEntityLineItems" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockIssuedDuringPeriodSharesAcquisitions" xlink:label="us-gaap_StockIssuedDuringPeriodSharesAcquisitions" xlink:title="us-gaap_StockIssuedDuringPeriodSharesAcquisitions" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="evex_DisclosureOfGeneralInformationAboutEntityLineItems" xlink:to="us-gaap_StockIssuedDuringPeriodSharesAcquisitions" xlink:title="Definition : evex_DisclosureOfGeneralInformationAboutEntityLineItems to us-gaap_StockIssuedDuringPeriodSharesAcquisitions" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockSharesSubscribedButUnissued" xlink:label="us-gaap_CommonStockSharesSubscribedButUnissued" xlink:title="us-gaap_CommonStockSharesSubscribedButUnissued" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="evex_DisclosureOfGeneralInformationAboutEntityLineItems" xlink:to="us-gaap_CommonStockSharesSubscribedButUnissued" xlink:title="Definition : evex_DisclosureOfGeneralInformationAboutEntityLineItems to us-gaap_CommonStockSharesSubscribedButUnissued" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SharePrice" xlink:label="us-gaap_SharePrice" xlink:title="us-gaap_SharePrice" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="evex_DisclosureOfGeneralInformationAboutEntityLineItems" xlink:to="us-gaap_SharePrice" xlink:title="Definition : evex_DisclosureOfGeneralInformationAboutEntityLineItems to us-gaap_SharePrice" xlink:type="arc" use="optional" order="2" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockSharesSubscriptions" xlink:label="us-gaap_CommonStockSharesSubscriptions" xlink:title="us-gaap_CommonStockSharesSubscriptions" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="evex_DisclosureOfGeneralInformationAboutEntityLineItems" xlink:to="us-gaap_CommonStockSharesSubscriptions" xlink:title="Definition : evex_DisclosureOfGeneralInformationAboutEntityLineItems to us-gaap_CommonStockSharesSubscriptions" xlink:type="arc" use="optional" order="3" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubsidiaryOrEquityMethodInvesteeCumulativePercentageOwnershipAfterAllTransactions" xlink:label="us-gaap_SubsidiaryOrEquityMethodInvesteeCumulativePercentageOwnershipAfterAllTransactions" xlink:title="us-gaap_SubsidiaryOrEquityMethodInvesteeCumulativePercentageOwnershipAfterAllTransactions" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="evex_DisclosureOfGeneralInformationAboutEntityLineItems" xlink:to="us-gaap_SubsidiaryOrEquityMethodInvesteeCumulativePercentageOwnershipAfterAllTransactions" xlink:title="Definition : evex_DisclosureOfGeneralInformationAboutEntityLineItems to us-gaap_SubsidiaryOrEquityMethodInvesteeCumulativePercentageOwnershipAfterAllTransactions" xlink:type="arc" use="optional" order="4" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_DisclosureOfGeneralInformationAboutEntityTable" xlink:label="evex_DisclosureOfGeneralInformationAboutEntityTable" xlink:title="evex_DisclosureOfGeneralInformationAboutEntityTable" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="evex_DisclosureOfGeneralInformationAboutEntityLineItems" xlink:to="evex_DisclosureOfGeneralInformationAboutEntityTable" xlink:title="Definition : evex_DisclosureOfGeneralInformationAboutEntityLineItems to evex_DisclosureOfGeneralInformationAboutEntityTable" xlink:type="arc" order="5" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_AgreementAxis" xlink:label="evex_AgreementAxis" xlink:title="evex_AgreementAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="evex_DisclosureOfGeneralInformationAboutEntityTable" xlink:to="evex_AgreementAxis" xlink:title="Definition : evex_DisclosureOfGeneralInformationAboutEntityTable to evex_AgreementAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_AgreementDomain" xlink:label="evex_AgreementDomain" xlink:title="evex_AgreementDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="evex_AgreementAxis" xlink:to="evex_AgreementDomain" xlink:title="Definition : evex_AgreementAxis to evex_AgreementDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_BusinessCombinationAgreementMember" xlink:label="evex_BusinessCombinationAgreementMember" xlink:title="evex_BusinessCombinationAgreementMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="evex_AgreementDomain" xlink:to="evex_BusinessCombinationAgreementMember" xlink:title="Definition : evex_AgreementDomain to evex_BusinessCombinationAgreementMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_AgreementDomain" xlink:label="evex_AgreementDomain_1" xlink:title="evex_AgreementDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="evex_AgreementAxis" xlink:to="evex_AgreementDomain_1" xlink:title="Definition : evex_AgreementAxis to evex_AgreementDomain" xlink:type="arc" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:title="dei_LegalEntityAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="evex_DisclosureOfGeneralInformationAboutEntityTable" xlink:to="dei_LegalEntityAxis" xlink:title="Definition : evex_DisclosureOfGeneralInformationAboutEntityTable to dei_LegalEntityAxis" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:title="dei_EntityDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:title="Definition : dei_LegalEntityAxis to dei_EntityDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_EmbraerAircraftHoldingIncMember" xlink:label="evex_EmbraerAircraftHoldingIncMember" xlink:title="evex_EmbraerAircraftHoldingIncMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_EntityDomain" xlink:to="evex_EmbraerAircraftHoldingIncMember" xlink:title="Definition : dei_EntityDomain to evex_EmbraerAircraftHoldingIncMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain_1" xlink:title="dei_EntityDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain_1" xlink:title="Definition : dei_LegalEntityAxis to dei_EntityDomain" xlink:type="arc" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:label="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:title="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="evex_DisclosureOfGeneralInformationAboutEntityTable" xlink:to="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:title="Definition : evex_DisclosureOfGeneralInformationAboutEntityTable to us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:type="arc" use="optional" order="2" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain" xlink:label="us-gaap_RelatedPartyDomain" xlink:title="us-gaap_RelatedPartyDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:to="us-gaap_RelatedPartyDomain" xlink:title="Definition : us-gaap_RelatedPartyTransactionsByRelatedPartyAxis to us-gaap_RelatedPartyDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_ZaniteAcquisitionCorpMember" xlink:label="evex_ZaniteAcquisitionCorpMember" xlink:title="evex_ZaniteAcquisitionCorpMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyDomain" xlink:to="evex_ZaniteAcquisitionCorpMember" xlink:title="Definition : us-gaap_RelatedPartyDomain to evex_ZaniteAcquisitionCorpMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain" xlink:label="us-gaap_RelatedPartyDomain_1" xlink:title="us-gaap_RelatedPartyDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:to="us-gaap_RelatedPartyDomain_1" xlink:title="Definition : us-gaap_RelatedPartyTransactionsByRelatedPartyAxis to us-gaap_RelatedPartyDomain" xlink:type="arc" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementEquityComponentsAxis" xlink:label="us-gaap_StatementEquityComponentsAxis" xlink:title="us-gaap_StatementEquityComponentsAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="evex_DisclosureOfGeneralInformationAboutEntityTable" xlink:to="us-gaap_StatementEquityComponentsAxis" xlink:title="Definition : evex_DisclosureOfGeneralInformationAboutEntityTable to us-gaap_StatementEquityComponentsAxis" xlink:type="arc" use="optional" order="3" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquityComponentDomain" xlink:label="us-gaap_EquityComponentDomain" xlink:title="us-gaap_EquityComponentDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_StatementEquityComponentsAxis" xlink:to="us-gaap_EquityComponentDomain" xlink:title="Definition : us-gaap_StatementEquityComponentsAxis to us-gaap_EquityComponentDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockMember" xlink:label="us-gaap_CommonStockMember" xlink:title="us-gaap_CommonStockMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EquityComponentDomain" xlink:to="us-gaap_CommonStockMember" xlink:title="Definition : us-gaap_EquityComponentDomain to us-gaap_CommonStockMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquityComponentDomain" xlink:label="us-gaap_EquityComponentDomain_1" xlink:title="us-gaap_EquityComponentDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_StatementEquityComponentsAxis" xlink:to="us-gaap_EquityComponentDomain_1" xlink:title="Definition : us-gaap_StatementEquityComponentsAxis to us-gaap_EquityComponentDomain" xlink:type="arc" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementClassOfStockAxis" xlink:label="us-gaap_StatementClassOfStockAxis" xlink:title="us-gaap_StatementClassOfStockAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="evex_DisclosureOfGeneralInformationAboutEntityTable" xlink:to="us-gaap_StatementClassOfStockAxis" xlink:title="Definition : evex_DisclosureOfGeneralInformationAboutEntityTable to us-gaap_StatementClassOfStockAxis" xlink:type="arc" use="optional" order="4" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfStockDomain" xlink:label="us-gaap_ClassOfStockDomain" xlink:title="us-gaap_ClassOfStockDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_StatementClassOfStockAxis" xlink:to="us-gaap_ClassOfStockDomain" xlink:title="Definition : us-gaap_StatementClassOfStockAxis to us-gaap_ClassOfStockDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonClassAMember" xlink:label="us-gaap_CommonClassAMember" xlink:title="us-gaap_CommonClassAMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ClassOfStockDomain" xlink:to="us-gaap_CommonClassAMember" xlink:title="Definition : us-gaap_ClassOfStockDomain to us-gaap_CommonClassAMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonClassBMember" xlink:label="us-gaap_CommonClassBMember" xlink:title="us-gaap_CommonClassBMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ClassOfStockDomain" xlink:to="us-gaap_CommonClassBMember" xlink:title="Definition : us-gaap_ClassOfStockDomain to us-gaap_CommonClassBMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfStockDomain" xlink:label="us-gaap_ClassOfStockDomain_1" xlink:title="us-gaap_ClassOfStockDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_StatementClassOfStockAxis" xlink:to="us-gaap_ClassOfStockDomain_1" xlink:title="Definition : us-gaap_StatementClassOfStockAxis to us-gaap_ClassOfStockDomain" xlink:type="arc" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubsidiarySaleOfStockAxis" xlink:label="us-gaap_SubsidiarySaleOfStockAxis" xlink:title="us-gaap_SubsidiarySaleOfStockAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="evex_DisclosureOfGeneralInformationAboutEntityTable" xlink:to="us-gaap_SubsidiarySaleOfStockAxis" xlink:title="Definition : evex_DisclosureOfGeneralInformationAboutEntityTable to us-gaap_SubsidiarySaleOfStockAxis" xlink:type="arc" use="optional" order="5" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SaleOfStockNameOfTransactionDomain" xlink:label="us-gaap_SaleOfStockNameOfTransactionDomain" xlink:title="us-gaap_SaleOfStockNameOfTransactionDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_SubsidiarySaleOfStockAxis" xlink:to="us-gaap_SaleOfStockNameOfTransactionDomain" xlink:title="Definition : us-gaap_SubsidiarySaleOfStockAxis to us-gaap_SaleOfStockNameOfTransactionDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PrivatePlacementMember" xlink:label="us-gaap_PrivatePlacementMember" xlink:title="us-gaap_PrivatePlacementMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_SaleOfStockNameOfTransactionDomain" xlink:to="us-gaap_PrivatePlacementMember" xlink:title="Definition : us-gaap_SaleOfStockNameOfTransactionDomain to us-gaap_PrivatePlacementMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SaleOfStockNameOfTransactionDomain" xlink:label="us-gaap_SaleOfStockNameOfTransactionDomain_1" xlink:title="us-gaap_SaleOfStockNameOfTransactionDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_SubsidiarySaleOfStockAxis" xlink:to="us-gaap_SaleOfStockNameOfTransactionDomain_1" xlink:title="Definition : us-gaap_SubsidiarySaleOfStockAxis to us-gaap_SaleOfStockNameOfTransactionDomain" xlink:type="arc" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_InvestorAxis" xlink:label="evex_InvestorAxis" xlink:title="evex_InvestorAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="evex_DisclosureOfGeneralInformationAboutEntityTable" xlink:to="evex_InvestorAxis" xlink:title="Definition : evex_DisclosureOfGeneralInformationAboutEntityTable to evex_InvestorAxis" xlink:type="arc" use="optional" order="6" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_InvestorDomain" xlink:label="evex_InvestorDomain" xlink:title="evex_InvestorDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="evex_InvestorAxis" xlink:to="evex_InvestorDomain" xlink:title="Definition : evex_InvestorAxis to evex_InvestorDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_PrivateInvestmentInPublicEquityInvestorsMember" xlink:label="evex_PrivateInvestmentInPublicEquityInvestorsMember" xlink:title="evex_PrivateInvestmentInPublicEquityInvestorsMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="evex_InvestorDomain" xlink:to="evex_PrivateInvestmentInPublicEquityInvestorsMember" xlink:title="Definition : evex_InvestorDomain to evex_PrivateInvestmentInPublicEquityInvestorsMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_ZaniteSponsorLlcMember" xlink:label="evex_ZaniteSponsorLlcMember" xlink:title="evex_ZaniteSponsorLlcMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="evex_InvestorDomain" xlink:to="evex_ZaniteSponsorLlcMember" xlink:title="Definition : evex_InvestorDomain to evex_ZaniteSponsorLlcMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="evex_InvestorDomain" xlink:to="evex_EmbraerAircraftHoldingIncMember" xlink:title="Definition : evex_InvestorDomain to evex_EmbraerAircraftHoldingIncMember" xlink:type="arc" use="optional" order="2" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_InvestorDomain" xlink:label="evex_InvestorDomain_1" xlink:title="evex_InvestorDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="evex_InvestorAxis" xlink:to="evex_InvestorDomain_1" xlink:title="Definition : evex_InvestorAxis to evex_InvestorDomain" xlink:type="arc" order="1" xbrldt:closed="false" />
  </link:definitionLink>
  <link:definitionLink xlink:type="extended" xlink:role="http://eveairmobility.com/role/EquityDetailsTextuals">
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfStockLineItems" xlink:label="us-gaap_ClassOfStockLineItems" xlink:title="us-gaap_ClassOfStockLineItems" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SharePrice" xlink:label="us-gaap_SharePrice" xlink:title="us-gaap_SharePrice" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ClassOfStockLineItems" xlink:to="us-gaap_SharePrice" xlink:title="Definition : us-gaap_ClassOfStockLineItems to us-gaap_SharePrice" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_AggregatePurchasePriceOfStock" xlink:label="evex_AggregatePurchasePriceOfStock" xlink:title="evex_AggregatePurchasePriceOfStock" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ClassOfStockLineItems" xlink:to="evex_AggregatePurchasePriceOfStock" xlink:title="Definition : us-gaap_ClassOfStockLineItems to evex_AggregatePurchasePriceOfStock" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockParOrStatedValuePerShare" xlink:label="us-gaap_CommonStockParOrStatedValuePerShare" xlink:title="us-gaap_CommonStockParOrStatedValuePerShare" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ClassOfStockLineItems" xlink:to="us-gaap_CommonStockParOrStatedValuePerShare" xlink:title="Definition : us-gaap_ClassOfStockLineItems to us-gaap_CommonStockParOrStatedValuePerShare" xlink:type="arc" use="optional" order="2" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PreferredStockParOrStatedValuePerShare" xlink:label="us-gaap_PreferredStockParOrStatedValuePerShare" xlink:title="us-gaap_PreferredStockParOrStatedValuePerShare" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ClassOfStockLineItems" xlink:to="us-gaap_PreferredStockParOrStatedValuePerShare" xlink:title="Definition : us-gaap_ClassOfStockLineItems to us-gaap_PreferredStockParOrStatedValuePerShare" xlink:type="arc" use="optional" order="3" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockSharesAuthorized" xlink:label="us-gaap_CommonStockSharesAuthorized" xlink:title="us-gaap_CommonStockSharesAuthorized" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ClassOfStockLineItems" xlink:to="us-gaap_CommonStockSharesAuthorized" xlink:title="Definition : us-gaap_ClassOfStockLineItems to us-gaap_CommonStockSharesAuthorized" xlink:type="arc" use="optional" order="4" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PreferredStockSharesAuthorized" xlink:label="us-gaap_PreferredStockSharesAuthorized" xlink:title="us-gaap_PreferredStockSharesAuthorized" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ClassOfStockLineItems" xlink:to="us-gaap_PreferredStockSharesAuthorized" xlink:title="Definition : us-gaap_ClassOfStockLineItems to us-gaap_PreferredStockSharesAuthorized" xlink:type="arc" use="optional" order="5" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockSharesIssued" xlink:label="us-gaap_CommonStockSharesIssued" xlink:title="us-gaap_CommonStockSharesIssued" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ClassOfStockLineItems" xlink:to="us-gaap_CommonStockSharesIssued" xlink:title="Definition : us-gaap_ClassOfStockLineItems to us-gaap_CommonStockSharesIssued" xlink:type="arc" use="optional" order="6" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockSharesOutstanding" xlink:label="us-gaap_CommonStockSharesOutstanding" xlink:title="us-gaap_CommonStockSharesOutstanding" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ClassOfStockLineItems" xlink:to="us-gaap_CommonStockSharesOutstanding" xlink:title="Definition : us-gaap_ClassOfStockLineItems to us-gaap_CommonStockSharesOutstanding" xlink:type="arc" use="optional" order="7" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PreferredStockSharesIssued" xlink:label="us-gaap_PreferredStockSharesIssued" xlink:title="us-gaap_PreferredStockSharesIssued" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ClassOfStockLineItems" xlink:to="us-gaap_PreferredStockSharesIssued" xlink:title="Definition : us-gaap_ClassOfStockLineItems to us-gaap_PreferredStockSharesIssued" xlink:type="arc" use="optional" order="8" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PreferredStockSharesOutstanding" xlink:label="us-gaap_PreferredStockSharesOutstanding" xlink:title="us-gaap_PreferredStockSharesOutstanding" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ClassOfStockLineItems" xlink:to="us-gaap_PreferredStockSharesOutstanding" xlink:title="Definition : us-gaap_ClassOfStockLineItems to us-gaap_PreferredStockSharesOutstanding" xlink:type="arc" use="optional" order="9" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockVotingRights" xlink:label="us-gaap_CommonStockVotingRights" xlink:title="us-gaap_CommonStockVotingRights" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ClassOfStockLineItems" xlink:to="us-gaap_CommonStockVotingRights" xlink:title="Definition : us-gaap_ClassOfStockLineItems to us-gaap_CommonStockVotingRights" xlink:type="arc" use="optional" order="10" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction" xlink:label="us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction" xlink:title="us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ClassOfStockLineItems" xlink:to="us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction" xlink:title="Definition : us-gaap_ClassOfStockLineItems to us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction" xlink:type="arc" use="optional" order="11" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SaleOfStockPricePerShare" xlink:label="us-gaap_SaleOfStockPricePerShare" xlink:title="us-gaap_SaleOfStockPricePerShare" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ClassOfStockLineItems" xlink:to="us-gaap_SaleOfStockPricePerShare" xlink:title="Definition : us-gaap_ClassOfStockLineItems to us-gaap_SaleOfStockPricePerShare" xlink:type="arc" use="optional" order="12" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_StockIssuedSharesExchangeForSurrenderAndCancellationOfWarrants" xlink:label="evex_StockIssuedSharesExchangeForSurrenderAndCancellationOfWarrants" xlink:title="evex_StockIssuedSharesExchangeForSurrenderAndCancellationOfWarrants" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ClassOfStockLineItems" xlink:to="evex_StockIssuedSharesExchangeForSurrenderAndCancellationOfWarrants" xlink:title="Definition : us-gaap_ClassOfStockLineItems to evex_StockIssuedSharesExchangeForSurrenderAndCancellationOfWarrants" xlink:type="arc" use="optional" order="13" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights" xlink:label="us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights" xlink:title="us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ClassOfStockLineItems" xlink:to="us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights" xlink:title="Definition : us-gaap_ClassOfStockLineItems to us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights" xlink:type="arc" use="optional" order="14" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SaleOfStockConsiderationReceivedPerTransaction" xlink:label="us-gaap_SaleOfStockConsiderationReceivedPerTransaction" xlink:title="us-gaap_SaleOfStockConsiderationReceivedPerTransaction" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ClassOfStockLineItems" xlink:to="us-gaap_SaleOfStockConsiderationReceivedPerTransaction" xlink:title="Definition : us-gaap_ClassOfStockLineItems to us-gaap_SaleOfStockConsiderationReceivedPerTransaction" xlink:type="arc" use="optional" order="15" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AdjustmentsToAdditionalPaidInCapitalStockIssuedIssuanceCosts" xlink:label="us-gaap_AdjustmentsToAdditionalPaidInCapitalStockIssuedIssuanceCosts" xlink:title="us-gaap_AdjustmentsToAdditionalPaidInCapitalStockIssuedIssuanceCosts" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ClassOfStockLineItems" xlink:to="us-gaap_AdjustmentsToAdditionalPaidInCapitalStockIssuedIssuanceCosts" xlink:title="Definition : us-gaap_ClassOfStockLineItems to us-gaap_AdjustmentsToAdditionalPaidInCapitalStockIssuedIssuanceCosts" xlink:type="arc" use="optional" order="16" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfStockByClassTable" xlink:label="us-gaap_ScheduleOfStockByClassTable" xlink:title="us-gaap_ScheduleOfStockByClassTable" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="us-gaap_ClassOfStockLineItems" xlink:to="us-gaap_ScheduleOfStockByClassTable" xlink:title="Definition : us-gaap_ClassOfStockLineItems to us-gaap_ScheduleOfStockByClassTable" xlink:type="arc" order="17" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubsidiarySaleOfStockAxis" xlink:label="us-gaap_SubsidiarySaleOfStockAxis" xlink:title="us-gaap_SubsidiarySaleOfStockAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ScheduleOfStockByClassTable" xlink:to="us-gaap_SubsidiarySaleOfStockAxis" xlink:title="Definition : us-gaap_ScheduleOfStockByClassTable to us-gaap_SubsidiarySaleOfStockAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SaleOfStockNameOfTransactionDomain" xlink:label="us-gaap_SaleOfStockNameOfTransactionDomain" xlink:title="us-gaap_SaleOfStockNameOfTransactionDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_SubsidiarySaleOfStockAxis" xlink:to="us-gaap_SaleOfStockNameOfTransactionDomain" xlink:title="Definition : us-gaap_SubsidiarySaleOfStockAxis to us-gaap_SaleOfStockNameOfTransactionDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PrivatePlacementMember" xlink:label="us-gaap_PrivatePlacementMember" xlink:title="us-gaap_PrivatePlacementMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_SaleOfStockNameOfTransactionDomain" xlink:to="us-gaap_PrivatePlacementMember" xlink:title="Definition : us-gaap_SaleOfStockNameOfTransactionDomain to us-gaap_PrivatePlacementMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_RegisteredDirectOfferingMember" xlink:label="evex_RegisteredDirectOfferingMember" xlink:title="evex_RegisteredDirectOfferingMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_SaleOfStockNameOfTransactionDomain" xlink:to="evex_RegisteredDirectOfferingMember" xlink:title="Definition : us-gaap_SaleOfStockNameOfTransactionDomain to evex_RegisteredDirectOfferingMember" xlink:type="arc" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SaleOfStockNameOfTransactionDomain" xlink:label="us-gaap_SaleOfStockNameOfTransactionDomain_1" xlink:title="us-gaap_SaleOfStockNameOfTransactionDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_SubsidiarySaleOfStockAxis" xlink:to="us-gaap_SaleOfStockNameOfTransactionDomain_1" xlink:title="Definition : us-gaap_SubsidiarySaleOfStockAxis to us-gaap_SaleOfStockNameOfTransactionDomain" xlink:type="arc" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:label="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:title="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ScheduleOfStockByClassTable" xlink:to="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:title="Definition : us-gaap_ScheduleOfStockByClassTable to us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain" xlink:label="us-gaap_RelatedPartyDomain" xlink:title="us-gaap_RelatedPartyDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:to="us-gaap_RelatedPartyDomain" xlink:title="Definition : us-gaap_RelatedPartyTransactionsByRelatedPartyAxis to us-gaap_RelatedPartyDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_EmbraerAircraftHoldingIncMember" xlink:label="evex_EmbraerAircraftHoldingIncMember" xlink:title="evex_EmbraerAircraftHoldingIncMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyDomain" xlink:to="evex_EmbraerAircraftHoldingIncMember" xlink:title="Definition : us-gaap_RelatedPartyDomain to evex_EmbraerAircraftHoldingIncMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_NidecAerospaceMember" xlink:label="evex_NidecAerospaceMember" xlink:title="evex_NidecAerospaceMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyDomain" xlink:to="evex_NidecAerospaceMember" xlink:title="Definition : us-gaap_RelatedPartyDomain to evex_NidecAerospaceMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain" xlink:label="us-gaap_RelatedPartyDomain_1" xlink:title="us-gaap_RelatedPartyDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:to="us-gaap_RelatedPartyDomain_1" xlink:title="Definition : us-gaap_RelatedPartyTransactionsByRelatedPartyAxis to us-gaap_RelatedPartyDomain" xlink:type="arc" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_AgreementAxis" xlink:label="evex_AgreementAxis" xlink:title="evex_AgreementAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ScheduleOfStockByClassTable" xlink:to="evex_AgreementAxis" xlink:title="Definition : us-gaap_ScheduleOfStockByClassTable to evex_AgreementAxis" xlink:type="arc" use="optional" order="2" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_AgreementDomain" xlink:label="evex_AgreementDomain" xlink:title="evex_AgreementDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="evex_AgreementAxis" xlink:to="evex_AgreementDomain" xlink:title="Definition : evex_AgreementAxis to evex_AgreementDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_SubscriptionAgreementsMember" xlink:label="evex_SubscriptionAgreementsMember" xlink:title="evex_SubscriptionAgreementsMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="evex_AgreementDomain" xlink:to="evex_SubscriptionAgreementsMember" xlink:title="Definition : evex_AgreementDomain to evex_SubscriptionAgreementsMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_WarrantExchangeAgreementsMember" xlink:label="evex_WarrantExchangeAgreementsMember" xlink:title="evex_WarrantExchangeAgreementsMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="evex_AgreementDomain" xlink:to="evex_WarrantExchangeAgreementsMember" xlink:title="Definition : evex_AgreementDomain to evex_WarrantExchangeAgreementsMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_WarrantAgreementsMember" xlink:label="evex_WarrantAgreementsMember" xlink:title="evex_WarrantAgreementsMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="evex_AgreementDomain" xlink:to="evex_WarrantAgreementsMember" xlink:title="Definition : evex_AgreementDomain to evex_WarrantAgreementsMember" xlink:type="arc" use="optional" order="2" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_AgreementDomain" xlink:label="evex_AgreementDomain_1" xlink:title="evex_AgreementDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="evex_AgreementAxis" xlink:to="evex_AgreementDomain_1" xlink:title="Definition : evex_AgreementAxis to evex_AgreementDomain" xlink:type="arc" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfWarrantOrRightAxis" xlink:label="us-gaap_ClassOfWarrantOrRightAxis" xlink:title="us-gaap_ClassOfWarrantOrRightAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ScheduleOfStockByClassTable" xlink:to="us-gaap_ClassOfWarrantOrRightAxis" xlink:title="Definition : us-gaap_ScheduleOfStockByClassTable to us-gaap_ClassOfWarrantOrRightAxis" xlink:type="arc" use="optional" order="3" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfWarrantOrRightDomain" xlink:label="us-gaap_ClassOfWarrantOrRightDomain" xlink:title="us-gaap_ClassOfWarrantOrRightDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_ClassOfWarrantOrRightAxis" xlink:to="us-gaap_ClassOfWarrantOrRightDomain" xlink:title="Definition : us-gaap_ClassOfWarrantOrRightAxis to us-gaap_ClassOfWarrantOrRightDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_PublicWarrantsMember" xlink:label="evex_PublicWarrantsMember" xlink:title="evex_PublicWarrantsMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ClassOfWarrantOrRightDomain" xlink:to="evex_PublicWarrantsMember" xlink:title="Definition : us-gaap_ClassOfWarrantOrRightDomain to evex_PublicWarrantsMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_StrategicPennyWarrantsMember" xlink:label="evex_StrategicPennyWarrantsMember" xlink:title="evex_StrategicPennyWarrantsMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ClassOfWarrantOrRightDomain" xlink:to="evex_StrategicPennyWarrantsMember" xlink:title="Definition : us-gaap_ClassOfWarrantOrRightDomain to evex_StrategicPennyWarrantsMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfWarrantOrRightDomain" xlink:label="us-gaap_ClassOfWarrantOrRightDomain_1" xlink:title="us-gaap_ClassOfWarrantOrRightDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_ClassOfWarrantOrRightAxis" xlink:to="us-gaap_ClassOfWarrantOrRightDomain_1" xlink:title="Definition : us-gaap_ClassOfWarrantOrRightAxis to us-gaap_ClassOfWarrantOrRightDomain" xlink:type="arc" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditFacilityAxis" xlink:label="us-gaap_LineOfCreditFacilityAxis" xlink:title="us-gaap_LineOfCreditFacilityAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ScheduleOfStockByClassTable" xlink:to="us-gaap_LineOfCreditFacilityAxis" xlink:title="Definition : us-gaap_ScheduleOfStockByClassTable to us-gaap_LineOfCreditFacilityAxis" xlink:type="arc" use="optional" order="4" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditFacilityLenderDomain" xlink:label="us-gaap_LineOfCreditFacilityLenderDomain" xlink:title="us-gaap_LineOfCreditFacilityLenderDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_LineOfCreditFacilityAxis" xlink:to="us-gaap_LineOfCreditFacilityLenderDomain" xlink:title="Definition : us-gaap_LineOfCreditFacilityAxis to us-gaap_LineOfCreditFacilityLenderDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_BrazilsNationalDevelopmentBankMember" xlink:label="evex_BrazilsNationalDevelopmentBankMember" xlink:title="evex_BrazilsNationalDevelopmentBankMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_LineOfCreditFacilityLenderDomain" xlink:to="evex_BrazilsNationalDevelopmentBankMember" xlink:title="Definition : us-gaap_LineOfCreditFacilityLenderDomain to evex_BrazilsNationalDevelopmentBankMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_BrazilianDepositaryReceiptsMember" xlink:label="evex_BrazilianDepositaryReceiptsMember" xlink:title="evex_BrazilianDepositaryReceiptsMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_LineOfCreditFacilityLenderDomain" xlink:to="evex_BrazilianDepositaryReceiptsMember" xlink:title="Definition : us-gaap_LineOfCreditFacilityLenderDomain to evex_BrazilianDepositaryReceiptsMember" xlink:type="arc" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditFacilityLenderDomain" xlink:label="us-gaap_LineOfCreditFacilityLenderDomain_1" xlink:title="us-gaap_LineOfCreditFacilityLenderDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_LineOfCreditFacilityAxis" xlink:to="us-gaap_LineOfCreditFacilityLenderDomain_1" xlink:title="Definition : us-gaap_LineOfCreditFacilityAxis to us-gaap_LineOfCreditFacilityLenderDomain" xlink:type="arc" order="1" xbrldt:closed="false" />
  </link:definitionLink>
  <link:definitionLink xlink:type="extended" xlink:role="http://eveairmobility.com/role/CommonStockWarrantsDetails1Textuals">
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfWarrantOrRightLineItems" xlink:label="us-gaap_ClassOfWarrantOrRightLineItems" xlink:title="us-gaap_ClassOfWarrantOrRightLineItems" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_NumberOfWarrantsExercised" xlink:label="evex_NumberOfWarrantsExercised" xlink:title="evex_NumberOfWarrantsExercised" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ClassOfWarrantOrRightLineItems" xlink:to="evex_NumberOfWarrantsExercised" xlink:title="Definition : us-gaap_ClassOfWarrantOrRightLineItems to evex_NumberOfWarrantsExercised" xlink:type="arc" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_StockIssuedDuringPeriodSharesWarrantsExercised" xlink:label="evex_StockIssuedDuringPeriodSharesWarrantsExercised" xlink:title="evex_StockIssuedDuringPeriodSharesWarrantsExercised" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ClassOfWarrantOrRightLineItems" xlink:to="evex_StockIssuedDuringPeriodSharesWarrantsExercised" xlink:title="Definition : us-gaap_ClassOfWarrantOrRightLineItems to evex_StockIssuedDuringPeriodSharesWarrantsExercised" xlink:type="arc" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_ClassOfWarrantsOrRightsIssued" xlink:label="evex_ClassOfWarrantsOrRightsIssued" xlink:title="evex_ClassOfWarrantsOrRightsIssued" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ClassOfWarrantOrRightLineItems" xlink:to="evex_ClassOfWarrantsOrRightsIssued" xlink:title="Definition : us-gaap_ClassOfWarrantOrRightLineItems to evex_ClassOfWarrantsOrRightsIssued" xlink:type="arc" use="optional" order="2" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_ClassOfWarrantOrRightRedemptionThresholdConsecutiveDaysFromDateOfClosingOfBusinessCombination" xlink:label="evex_ClassOfWarrantOrRightRedemptionThresholdConsecutiveDaysFromDateOfClosingOfBusinessCombination" xlink:title="evex_ClassOfWarrantOrRightRedemptionThresholdConsecutiveDaysFromDateOfClosingOfBusinessCombination" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ClassOfWarrantOrRightLineItems" xlink:to="evex_ClassOfWarrantOrRightRedemptionThresholdConsecutiveDaysFromDateOfClosingOfBusinessCombination" xlink:title="Definition : us-gaap_ClassOfWarrantOrRightLineItems to evex_ClassOfWarrantOrRightRedemptionThresholdConsecutiveDaysFromDateOfClosingOfBusinessCombination" xlink:type="arc" use="optional" order="3" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_WarrantsAndRightsOutstandingTerm" xlink:label="us-gaap_WarrantsAndRightsOutstandingTerm" xlink:title="us-gaap_WarrantsAndRightsOutstandingTerm" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ClassOfWarrantOrRightLineItems" xlink:to="us-gaap_WarrantsAndRightsOutstandingTerm" xlink:title="Definition : us-gaap_ClassOfWarrantOrRightLineItems to us-gaap_WarrantsAndRightsOutstandingTerm" xlink:type="arc" use="optional" order="4" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByEachWarrantOrRight" xlink:label="us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByEachWarrantOrRight" xlink:title="us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByEachWarrantOrRight" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ClassOfWarrantOrRightLineItems" xlink:to="us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByEachWarrantOrRight" xlink:title="Definition : us-gaap_ClassOfWarrantOrRightLineItems to us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByEachWarrantOrRight" xlink:type="arc" use="optional" order="5" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1" xlink:label="us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1" xlink:title="us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ClassOfWarrantOrRightLineItems" xlink:to="us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1" xlink:title="Definition : us-gaap_ClassOfWarrantOrRightLineItems to us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1" xlink:type="arc" use="optional" order="6" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfWarrantOrRighstDateFromWhichWarrantsOrRightsExercisable" xlink:label="us-gaap_ClassOfWarrantOrRighstDateFromWhichWarrantsOrRightsExercisable" xlink:title="us-gaap_ClassOfWarrantOrRighstDateFromWhichWarrantsOrRightsExercisable" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ClassOfWarrantOrRightLineItems" xlink:to="us-gaap_ClassOfWarrantOrRighstDateFromWhichWarrantsOrRightsExercisable" xlink:title="Definition : us-gaap_ClassOfWarrantOrRightLineItems to us-gaap_ClassOfWarrantOrRighstDateFromWhichWarrantsOrRightsExercisable" xlink:type="arc" use="optional" order="7" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_ClassOfWarrantsRedemptionPricePerUnit" xlink:label="evex_ClassOfWarrantsRedemptionPricePerUnit" xlink:title="evex_ClassOfWarrantsRedemptionPricePerUnit" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ClassOfWarrantOrRightLineItems" xlink:to="evex_ClassOfWarrantsRedemptionPricePerUnit" xlink:title="Definition : us-gaap_ClassOfWarrantOrRightLineItems to evex_ClassOfWarrantsRedemptionPricePerUnit" xlink:type="arc" use="optional" order="8" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_ClassOfWarrantsConvertibleStockPriceTrigger" xlink:label="evex_ClassOfWarrantsConvertibleStockPriceTrigger" xlink:title="evex_ClassOfWarrantsConvertibleStockPriceTrigger" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ClassOfWarrantOrRightLineItems" xlink:to="evex_ClassOfWarrantsConvertibleStockPriceTrigger" xlink:title="Definition : us-gaap_ClassOfWarrantOrRightLineItems to evex_ClassOfWarrantsConvertibleStockPriceTrigger" xlink:type="arc" use="optional" order="9" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_ClassOfWarrantOrRightRedemptionThresholdConsecutiveTradingDays" xlink:label="evex_ClassOfWarrantOrRightRedemptionThresholdConsecutiveTradingDays" xlink:title="evex_ClassOfWarrantOrRightRedemptionThresholdConsecutiveTradingDays" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ClassOfWarrantOrRightLineItems" xlink:to="evex_ClassOfWarrantOrRightRedemptionThresholdConsecutiveTradingDays" xlink:title="Definition : us-gaap_ClassOfWarrantOrRightLineItems to evex_ClassOfWarrantOrRightRedemptionThresholdConsecutiveTradingDays" xlink:type="arc" use="optional" order="10" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_ClassOfWarrantOrRightRedemptionThresholdTradingDays" xlink:label="evex_ClassOfWarrantOrRightRedemptionThresholdTradingDays" xlink:title="evex_ClassOfWarrantOrRightRedemptionThresholdTradingDays" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ClassOfWarrantOrRightLineItems" xlink:to="evex_ClassOfWarrantOrRightRedemptionThresholdTradingDays" xlink:title="Definition : us-gaap_ClassOfWarrantOrRightLineItems to evex_ClassOfWarrantOrRightRedemptionThresholdTradingDays" xlink:type="arc" use="optional" order="11" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockholdersEquityNoteStockSplitConversionRatio1" xlink:label="us-gaap_StockholdersEquityNoteStockSplitConversionRatio1" xlink:title="us-gaap_StockholdersEquityNoteStockSplitConversionRatio1" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ClassOfWarrantOrRightLineItems" xlink:to="us-gaap_StockholdersEquityNoteStockSplitConversionRatio1" xlink:title="Definition : us-gaap_ClassOfWarrantOrRightLineItems to us-gaap_StockholdersEquityNoteStockSplitConversionRatio1" xlink:type="arc" use="optional" order="12" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_IncreaseDecreaseThroughReclassificationOfPublicWarrantsFromLiability" xlink:label="evex_IncreaseDecreaseThroughReclassificationOfPublicWarrantsFromLiability" xlink:title="evex_IncreaseDecreaseThroughReclassificationOfPublicWarrantsFromLiability" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ClassOfWarrantOrRightLineItems" xlink:to="evex_IncreaseDecreaseThroughReclassificationOfPublicWarrantsFromLiability" xlink:title="Definition : us-gaap_ClassOfWarrantOrRightLineItems to evex_IncreaseDecreaseThroughReclassificationOfPublicWarrantsFromLiability" xlink:type="arc" use="optional" order="13" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfWarrantOrRightTable" xlink:label="us-gaap_ClassOfWarrantOrRightTable" xlink:title="us-gaap_ClassOfWarrantOrRightTable" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="us-gaap_ClassOfWarrantOrRightLineItems" xlink:to="us-gaap_ClassOfWarrantOrRightTable" xlink:title="Definition : us-gaap_ClassOfWarrantOrRightLineItems to us-gaap_ClassOfWarrantOrRightTable" xlink:type="arc" use="optional" order="14" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfWarrantOrRightAxis" xlink:label="us-gaap_ClassOfWarrantOrRightAxis" xlink:title="us-gaap_ClassOfWarrantOrRightAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ClassOfWarrantOrRightTable" xlink:to="us-gaap_ClassOfWarrantOrRightAxis" xlink:title="Definition : us-gaap_ClassOfWarrantOrRightTable to us-gaap_ClassOfWarrantOrRightAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfWarrantOrRightDomain" xlink:label="us-gaap_ClassOfWarrantOrRightDomain" xlink:title="us-gaap_ClassOfWarrantOrRightDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_ClassOfWarrantOrRightAxis" xlink:to="us-gaap_ClassOfWarrantOrRightDomain" xlink:title="Definition : us-gaap_ClassOfWarrantOrRightAxis to us-gaap_ClassOfWarrantOrRightDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_WarrantMember" xlink:label="us-gaap_WarrantMember" xlink:title="us-gaap_WarrantMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ClassOfWarrantOrRightDomain" xlink:to="us-gaap_WarrantMember" xlink:title="Definition : us-gaap_ClassOfWarrantOrRightDomain to us-gaap_WarrantMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_PublicWarrantsMember" xlink:label="evex_PublicWarrantsMember" xlink:title="evex_PublicWarrantsMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ClassOfWarrantOrRightDomain" xlink:to="evex_PublicWarrantsMember" xlink:title="Definition : us-gaap_ClassOfWarrantOrRightDomain to evex_PublicWarrantsMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_PrivatePlacementWarrantMember" xlink:label="evex_PrivatePlacementWarrantMember" xlink:title="evex_PrivatePlacementWarrantMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ClassOfWarrantOrRightDomain" xlink:to="evex_PrivatePlacementWarrantMember" xlink:title="Definition : us-gaap_ClassOfWarrantOrRightDomain to evex_PrivatePlacementWarrantMember" xlink:type="arc" use="optional" order="2" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:label="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:title="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ClassOfWarrantOrRightTable" xlink:to="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:title="Definition : us-gaap_ClassOfWarrantOrRightTable to us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain" xlink:label="us-gaap_RelatedPartyDomain" xlink:title="us-gaap_RelatedPartyDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:to="us-gaap_RelatedPartyDomain" xlink:title="Definition : us-gaap_RelatedPartyTransactionsByRelatedPartyAxis to us-gaap_RelatedPartyDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_ZaniteAcquisitionCorpMember" xlink:label="evex_ZaniteAcquisitionCorpMember" xlink:title="evex_ZaniteAcquisitionCorpMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyDomain" xlink:to="evex_ZaniteAcquisitionCorpMember" xlink:title="Definition : us-gaap_RelatedPartyDomain to evex_ZaniteAcquisitionCorpMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementEquityComponentsAxis" xlink:label="us-gaap_StatementEquityComponentsAxis" xlink:title="us-gaap_StatementEquityComponentsAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ClassOfWarrantOrRightTable" xlink:to="us-gaap_StatementEquityComponentsAxis" xlink:title="Definition : us-gaap_ClassOfWarrantOrRightTable to us-gaap_StatementEquityComponentsAxis" xlink:type="arc" use="optional" order="2" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquityComponentDomain" xlink:label="us-gaap_EquityComponentDomain" xlink:title="us-gaap_EquityComponentDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_StatementEquityComponentsAxis" xlink:to="us-gaap_EquityComponentDomain" xlink:title="Definition : us-gaap_StatementEquityComponentsAxis to us-gaap_EquityComponentDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockMember" xlink:label="us-gaap_CommonStockMember" xlink:title="us-gaap_CommonStockMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EquityComponentDomain" xlink:to="us-gaap_CommonStockMember" xlink:title="Definition : us-gaap_EquityComponentDomain to us-gaap_CommonStockMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementClassOfStockAxis" xlink:label="us-gaap_StatementClassOfStockAxis" xlink:title="us-gaap_StatementClassOfStockAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ClassOfWarrantOrRightTable" xlink:to="us-gaap_StatementClassOfStockAxis" xlink:title="Definition : us-gaap_ClassOfWarrantOrRightTable to us-gaap_StatementClassOfStockAxis" xlink:type="arc" use="optional" order="3" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfStockDomain" xlink:label="us-gaap_ClassOfStockDomain" xlink:title="us-gaap_ClassOfStockDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_StatementClassOfStockAxis" xlink:to="us-gaap_ClassOfStockDomain" xlink:title="Definition : us-gaap_StatementClassOfStockAxis to us-gaap_ClassOfStockDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonClassAMember" xlink:label="us-gaap_CommonClassAMember" xlink:title="us-gaap_CommonClassAMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ClassOfStockDomain" xlink:to="us-gaap_CommonClassAMember" xlink:title="Definition : us-gaap_ClassOfStockDomain to us-gaap_CommonClassAMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonClassBMember" xlink:label="us-gaap_CommonClassBMember" xlink:title="us-gaap_CommonClassBMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ClassOfStockDomain" xlink:to="us-gaap_CommonClassBMember" xlink:title="Definition : us-gaap_ClassOfStockDomain to us-gaap_CommonClassBMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_ClassOfStrategicWarrantsAxis" xlink:label="evex_ClassOfStrategicWarrantsAxis" xlink:title="evex_ClassOfStrategicWarrantsAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ClassOfWarrantOrRightTable" xlink:to="evex_ClassOfStrategicWarrantsAxis" xlink:title="Definition : us-gaap_ClassOfWarrantOrRightTable to evex_ClassOfStrategicWarrantsAxis" xlink:type="arc" use="optional" order="4" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_ClassOfStrategicWarrantsDomain" xlink:label="evex_ClassOfStrategicWarrantsDomain" xlink:title="evex_ClassOfStrategicWarrantsDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="evex_ClassOfStrategicWarrantsAxis" xlink:to="evex_ClassOfStrategicWarrantsDomain" xlink:title="Definition : evex_ClassOfStrategicWarrantsAxis to evex_ClassOfStrategicWarrantsDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_StrategicPennyWarrantsMember" xlink:label="evex_StrategicPennyWarrantsMember" xlink:title="evex_StrategicPennyWarrantsMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="evex_ClassOfStrategicWarrantsDomain" xlink:to="evex_StrategicPennyWarrantsMember" xlink:title="Definition : evex_ClassOfStrategicWarrantsDomain to evex_StrategicPennyWarrantsMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_ClassOfStrategicWarrantsDomain" xlink:label="evex_ClassOfStrategicWarrantsDomain_1" xlink:title="evex_ClassOfStrategicWarrantsDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="evex_ClassOfStrategicWarrantsAxis" xlink:to="evex_ClassOfStrategicWarrantsDomain_1" xlink:title="Definition : evex_ClassOfStrategicWarrantsAxis to evex_ClassOfStrategicWarrantsDomain" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
  </link:definitionLink>
  <link:definitionLink xlink:type="extended" xlink:role="http://eveairmobility.com/role/ComprehensiveincomeDetails">
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems" xlink:label="us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems" xlink:title="us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInStockholdersEquityRollForward" xlink:label="us-gaap_IncreaseDecreaseInStockholdersEquityRollForward" xlink:title="us-gaap_IncreaseDecreaseInStockholdersEquityRollForward" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems" xlink:to="us-gaap_IncreaseDecreaseInStockholdersEquityRollForward" xlink:title="Definition : us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems to us-gaap_IncreaseDecreaseInStockholdersEquityRollForward" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax" xlink:label="us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax" xlink:title="us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_IncreaseDecreaseInStockholdersEquityRollForward" xlink:to="us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax" xlink:title="Definition : us-gaap_IncreaseDecreaseInStockholdersEquityRollForward to us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationBeforeTaxParent" xlink:label="us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationBeforeTaxParent" xlink:title="us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationBeforeTaxParent" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_IncreaseDecreaseInStockholdersEquityRollForward" xlink:to="us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationBeforeTaxParent" xlink:title="Definition : us-gaap_IncreaseDecreaseInStockholdersEquityRollForward to us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationBeforeTaxParent" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossTable" xlink:label="us-gaap_AccumulatedOtherComprehensiveIncomeLossTable" xlink:title="us-gaap_AccumulatedOtherComprehensiveIncomeLossTable" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems" xlink:to="us-gaap_AccumulatedOtherComprehensiveIncomeLossTable" xlink:title="Definition : us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems to us-gaap_AccumulatedOtherComprehensiveIncomeLossTable" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementEquityComponentsAxis" xlink:label="us-gaap_StatementEquityComponentsAxis" xlink:title="us-gaap_StatementEquityComponentsAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_AccumulatedOtherComprehensiveIncomeLossTable" xlink:to="us-gaap_StatementEquityComponentsAxis" xlink:title="Definition : us-gaap_AccumulatedOtherComprehensiveIncomeLossTable to us-gaap_StatementEquityComponentsAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquityComponentDomain" xlink:label="us-gaap_EquityComponentDomain" xlink:title="us-gaap_EquityComponentDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_StatementEquityComponentsAxis" xlink:to="us-gaap_EquityComponentDomain" xlink:title="Definition : us-gaap_StatementEquityComponentsAxis to us-gaap_EquityComponentDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeMember" xlink:label="us-gaap_AccumulatedOtherComprehensiveIncomeMember" xlink:title="us-gaap_AccumulatedOtherComprehensiveIncomeMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EquityComponentDomain" xlink:to="us-gaap_AccumulatedOtherComprehensiveIncomeMember" xlink:title="Definition : us-gaap_EquityComponentDomain to us-gaap_AccumulatedOtherComprehensiveIncomeMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquityComponentDomain" xlink:label="us-gaap_EquityComponentDomain_1" xlink:title="us-gaap_EquityComponentDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_StatementEquityComponentsAxis" xlink:to="us-gaap_EquityComponentDomain_1" xlink:title="Definition : us-gaap_StatementEquityComponentsAxis to us-gaap_EquityComponentDomain" xlink:type="arc" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_CumulativeEffectPeriodOfAdoptionAxis" xlink:label="srt_CumulativeEffectPeriodOfAdoptionAxis" xlink:title="srt_CumulativeEffectPeriodOfAdoptionAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_AccumulatedOtherComprehensiveIncomeLossTable" xlink:to="srt_CumulativeEffectPeriodOfAdoptionAxis" xlink:title="Definition : us-gaap_AccumulatedOtherComprehensiveIncomeLossTable to srt_CumulativeEffectPeriodOfAdoptionAxis" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_CumulativeEffectPeriodOfAdoptionDomain" xlink:label="srt_CumulativeEffectPeriodOfAdoptionDomain" xlink:title="srt_CumulativeEffectPeriodOfAdoptionDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="srt_CumulativeEffectPeriodOfAdoptionAxis" xlink:to="srt_CumulativeEffectPeriodOfAdoptionDomain" xlink:title="Definition : srt_CumulativeEffectPeriodOfAdoptionAxis to srt_CumulativeEffectPeriodOfAdoptionDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_CumulativeEffectPeriodOfAdoptionAdjustmentMember" xlink:label="srt_CumulativeEffectPeriodOfAdoptionAdjustmentMember" xlink:title="srt_CumulativeEffectPeriodOfAdoptionAdjustmentMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_CumulativeEffectPeriodOfAdoptionDomain" xlink:to="srt_CumulativeEffectPeriodOfAdoptionAdjustmentMember" xlink:title="Definition : srt_CumulativeEffectPeriodOfAdoptionDomain to srt_CumulativeEffectPeriodOfAdoptionAdjustmentMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_CumulativeEffectPeriodOfAdoptionAdjustedBalanceMember" xlink:label="srt_CumulativeEffectPeriodOfAdoptionAdjustedBalanceMember" xlink:title="srt_CumulativeEffectPeriodOfAdoptionAdjustedBalanceMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_CumulativeEffectPeriodOfAdoptionDomain" xlink:to="srt_CumulativeEffectPeriodOfAdoptionAdjustedBalanceMember" xlink:title="Definition : srt_CumulativeEffectPeriodOfAdoptionDomain to srt_CumulativeEffectPeriodOfAdoptionAdjustedBalanceMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_CumulativeEffectPeriodOfAdoptionDomain" xlink:label="srt_CumulativeEffectPeriodOfAdoptionDomain_1" xlink:title="srt_CumulativeEffectPeriodOfAdoptionDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="srt_CumulativeEffectPeriodOfAdoptionAxis" xlink:to="srt_CumulativeEffectPeriodOfAdoptionDomain_1" xlink:title="Definition : srt_CumulativeEffectPeriodOfAdoptionAxis to srt_CumulativeEffectPeriodOfAdoptionDomain" xlink:type="arc" order="1" xbrldt:closed="false" />
  </link:definitionLink>
  <link:definitionLink xlink:type="extended" xlink:role="http://eveairmobility.com/role/SummaryofSignificantAccountingPoliciesDetails3Textuals">
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_DisclosureOfSummaryOfSignificantAccountingPoliciesLineItems" xlink:label="evex_DisclosureOfSummaryOfSignificantAccountingPoliciesLineItems" xlink:title="evex_DisclosureOfSummaryOfSignificantAccountingPoliciesLineItems" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeTaxExaminationLikelihoodOfUnfavorableSettlement" xlink:label="us-gaap_IncomeTaxExaminationLikelihoodOfUnfavorableSettlement" xlink:title="us-gaap_IncomeTaxExaminationLikelihoodOfUnfavorableSettlement" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="evex_DisclosureOfSummaryOfSignificantAccountingPoliciesLineItems" xlink:to="us-gaap_IncomeTaxExaminationLikelihoodOfUnfavorableSettlement" xlink:title="Definition : evex_DisclosureOfSummaryOfSignificantAccountingPoliciesLineItems to us-gaap_IncomeTaxExaminationLikelihoodOfUnfavorableSettlement" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonUnitOutstanding" xlink:label="us-gaap_CommonUnitOutstanding" xlink:title="us-gaap_CommonUnitOutstanding" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="evex_DisclosureOfSummaryOfSignificantAccountingPoliciesLineItems" xlink:to="us-gaap_CommonUnitOutstanding" xlink:title="Definition : evex_DisclosureOfSummaryOfSignificantAccountingPoliciesLineItems to us-gaap_CommonUnitOutstanding" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetUsefulLife" xlink:label="us-gaap_FiniteLivedIntangibleAssetUsefulLife" xlink:title="us-gaap_FiniteLivedIntangibleAssetUsefulLife" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="evex_DisclosureOfSummaryOfSignificantAccountingPoliciesLineItems" xlink:to="us-gaap_FiniteLivedIntangibleAssetUsefulLife" xlink:title="Definition : evex_DisclosureOfSummaryOfSignificantAccountingPoliciesLineItems to us-gaap_FiniteLivedIntangibleAssetUsefulLife" xlink:type="arc" use="optional" order="2" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsGranted" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsGranted" xlink:title="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsGranted" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="evex_DisclosureOfSummaryOfSignificantAccountingPoliciesLineItems" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsGranted" xlink:title="Definition : evex_DisclosureOfSummaryOfSignificantAccountingPoliciesLineItems to us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsGranted" xlink:type="arc" use="optional" order="3" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod" xlink:title="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="evex_DisclosureOfSummaryOfSignificantAccountingPoliciesLineItems" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod" xlink:title="Definition : evex_DisclosureOfSummaryOfSignificantAccountingPoliciesLineItems to us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod" xlink:type="arc" use="optional" order="4" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber" xlink:title="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="evex_DisclosureOfSummaryOfSignificantAccountingPoliciesLineItems" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber" xlink:title="Definition : evex_DisclosureOfSummaryOfSignificantAccountingPoliciesLineItems to us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber" xlink:type="arc" use="optional" order="5" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1" xlink:title="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="evex_DisclosureOfSummaryOfSignificantAccountingPoliciesLineItems" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1" xlink:title="Definition : evex_DisclosureOfSummaryOfSignificantAccountingPoliciesLineItems to us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1" xlink:type="arc" use="optional" order="6" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_ExpenseRelatedToIssuanceOfNewWarrants" xlink:label="evex_ExpenseRelatedToIssuanceOfNewWarrants" xlink:title="evex_ExpenseRelatedToIssuanceOfNewWarrants" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="evex_DisclosureOfSummaryOfSignificantAccountingPoliciesLineItems" xlink:to="evex_ExpenseRelatedToIssuanceOfNewWarrants" xlink:title="Definition : evex_DisclosureOfSummaryOfSignificantAccountingPoliciesLineItems to evex_ExpenseRelatedToIssuanceOfNewWarrants" xlink:type="arc" use="optional" order="7" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_NumberOfVerticalLiftElectricMotorsInAircraf" xlink:label="evex_NumberOfVerticalLiftElectricMotorsInAircraf" xlink:title="evex_NumberOfVerticalLiftElectricMotorsInAircraf" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="evex_DisclosureOfSummaryOfSignificantAccountingPoliciesLineItems" xlink:to="evex_NumberOfVerticalLiftElectricMotorsInAircraf" xlink:title="Definition : evex_DisclosureOfSummaryOfSignificantAccountingPoliciesLineItems to evex_NumberOfVerticalLiftElectricMotorsInAircraf" xlink:type="arc" use="optional" order="8" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_NumberOfHorizontalPropulsionElectricMotorsInAircraft" xlink:label="evex_NumberOfHorizontalPropulsionElectricMotorsInAircraft" xlink:title="evex_NumberOfHorizontalPropulsionElectricMotorsInAircraft" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="evex_DisclosureOfSummaryOfSignificantAccountingPoliciesLineItems" xlink:to="evex_NumberOfHorizontalPropulsionElectricMotorsInAircraft" xlink:title="Definition : evex_DisclosureOfSummaryOfSignificantAccountingPoliciesLineItems to evex_NumberOfHorizontalPropulsionElectricMotorsInAircraft" xlink:type="arc" use="optional" order="9" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockholdersEquityNoteStockSplitConversionRatio1" xlink:label="us-gaap_StockholdersEquityNoteStockSplitConversionRatio1" xlink:title="us-gaap_StockholdersEquityNoteStockSplitConversionRatio1" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="evex_DisclosureOfSummaryOfSignificantAccountingPoliciesLineItems" xlink:to="us-gaap_StockholdersEquityNoteStockSplitConversionRatio1" xlink:title="Definition : evex_DisclosureOfSummaryOfSignificantAccountingPoliciesLineItems to us-gaap_StockholdersEquityNoteStockSplitConversionRatio1" xlink:type="arc" use="optional" order="10" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1" xlink:label="us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1" xlink:title="us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="evex_DisclosureOfSummaryOfSignificantAccountingPoliciesLineItems" xlink:to="us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1" xlink:title="Definition : evex_DisclosureOfSummaryOfSignificantAccountingPoliciesLineItems to us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1" xlink:type="arc" use="optional" order="11" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_NumberOfTranchesGrantedUnderShareBasedPaymentAward" xlink:label="evex_NumberOfTranchesGrantedUnderShareBasedPaymentAward" xlink:title="evex_NumberOfTranchesGrantedUnderShareBasedPaymentAward" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="evex_DisclosureOfSummaryOfSignificantAccountingPoliciesLineItems" xlink:to="evex_NumberOfTranchesGrantedUnderShareBasedPaymentAward" xlink:title="Definition : evex_DisclosureOfSummaryOfSignificantAccountingPoliciesLineItems to evex_NumberOfTranchesGrantedUnderShareBasedPaymentAward" xlink:type="arc" use="optional" order="12" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_NumberOfTranchesGrantedUnderShareBasedPaymentAwardForPerformanceConditions" xlink:label="evex_NumberOfTranchesGrantedUnderShareBasedPaymentAwardForPerformanceConditions" xlink:title="evex_NumberOfTranchesGrantedUnderShareBasedPaymentAwardForPerformanceConditions" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="evex_DisclosureOfSummaryOfSignificantAccountingPoliciesLineItems" xlink:to="evex_NumberOfTranchesGrantedUnderShareBasedPaymentAwardForPerformanceConditions" xlink:title="Definition : evex_DisclosureOfSummaryOfSignificantAccountingPoliciesLineItems to evex_NumberOfTranchesGrantedUnderShareBasedPaymentAwardForPerformanceConditions" xlink:type="arc" use="optional" order="13" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_NumberOfTranchesGrantedUnderShareBasedPaymentAwardForServiceConditions" xlink:label="evex_NumberOfTranchesGrantedUnderShareBasedPaymentAwardForServiceConditions" xlink:title="evex_NumberOfTranchesGrantedUnderShareBasedPaymentAwardForServiceConditions" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="evex_DisclosureOfSummaryOfSignificantAccountingPoliciesLineItems" xlink:to="evex_NumberOfTranchesGrantedUnderShareBasedPaymentAwardForServiceConditions" xlink:title="Definition : evex_DisclosureOfSummaryOfSignificantAccountingPoliciesLineItems to evex_NumberOfTranchesGrantedUnderShareBasedPaymentAwardForServiceConditions" xlink:type="arc" use="optional" order="14" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_NumberOfTranchesGrantedUnderShareBasedPaymentAwardForMarketAndServiceConditions" xlink:label="evex_NumberOfTranchesGrantedUnderShareBasedPaymentAwardForMarketAndServiceConditions" xlink:title="evex_NumberOfTranchesGrantedUnderShareBasedPaymentAwardForMarketAndServiceConditions" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="evex_DisclosureOfSummaryOfSignificantAccountingPoliciesLineItems" xlink:to="evex_NumberOfTranchesGrantedUnderShareBasedPaymentAwardForMarketAndServiceConditions" xlink:title="Definition : evex_DisclosureOfSummaryOfSignificantAccountingPoliciesLineItems to evex_NumberOfTranchesGrantedUnderShareBasedPaymentAwardForMarketAndServiceConditions" xlink:type="arc" use="optional" order="15" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_PeriodOfIncubationStage" xlink:label="evex_PeriodOfIncubationStage" xlink:title="evex_PeriodOfIncubationStage" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="evex_DisclosureOfSummaryOfSignificantAccountingPoliciesLineItems" xlink:to="evex_PeriodOfIncubationStage" xlink:title="Definition : evex_DisclosureOfSummaryOfSignificantAccountingPoliciesLineItems to evex_PeriodOfIncubationStage" xlink:type="arc" use="optional" order="16" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_DisclosureOfSummaryOfSignificantAccountingPoliciesTable" xlink:label="evex_DisclosureOfSummaryOfSignificantAccountingPoliciesTable" xlink:title="evex_DisclosureOfSummaryOfSignificantAccountingPoliciesTable" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="evex_DisclosureOfSummaryOfSignificantAccountingPoliciesLineItems" xlink:to="evex_DisclosureOfSummaryOfSignificantAccountingPoliciesTable" xlink:title="Definition : evex_DisclosureOfSummaryOfSignificantAccountingPoliciesLineItems to evex_DisclosureOfSummaryOfSignificantAccountingPoliciesTable" xlink:type="arc" order="17" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidatedEntitiesAxis" xlink:label="srt_ConsolidatedEntitiesAxis" xlink:title="srt_ConsolidatedEntitiesAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="evex_DisclosureOfSummaryOfSignificantAccountingPoliciesTable" xlink:to="srt_ConsolidatedEntitiesAxis" xlink:title="Definition : evex_DisclosureOfSummaryOfSignificantAccountingPoliciesTable to srt_ConsolidatedEntitiesAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidatedEntitiesDomain" xlink:label="srt_ConsolidatedEntitiesDomain" xlink:title="srt_ConsolidatedEntitiesDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="srt_ConsolidatedEntitiesAxis" xlink:to="srt_ConsolidatedEntitiesDomain" xlink:title="Definition : srt_ConsolidatedEntitiesAxis to srt_ConsolidatedEntitiesDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ParentCompanyMember" xlink:label="srt_ParentCompanyMember" xlink:title="srt_ParentCompanyMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_ConsolidatedEntitiesDomain" xlink:to="srt_ParentCompanyMember" xlink:title="Definition : srt_ConsolidatedEntitiesDomain to srt_ParentCompanyMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidatedEntitiesDomain" xlink:label="srt_ConsolidatedEntitiesDomain_1" xlink:title="srt_ConsolidatedEntitiesDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="srt_ConsolidatedEntitiesAxis" xlink:to="srt_ConsolidatedEntitiesDomain_1" xlink:title="Definition : srt_ConsolidatedEntitiesAxis to srt_ConsolidatedEntitiesDomain" xlink:type="arc" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis" xlink:label="us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis" xlink:title="us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="evex_DisclosureOfSummaryOfSignificantAccountingPoliciesTable" xlink:to="us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis" xlink:title="Definition : evex_DisclosureOfSummaryOfSignificantAccountingPoliciesTable to us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:label="us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:title="us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis" xlink:to="us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:title="Definition : us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis to us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ComputerSoftwareIntangibleAssetMember" xlink:label="us-gaap_ComputerSoftwareIntangibleAssetMember" xlink:title="us-gaap_ComputerSoftwareIntangibleAssetMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:to="us-gaap_ComputerSoftwareIntangibleAssetMember" xlink:title="Definition : us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain to us-gaap_ComputerSoftwareIntangibleAssetMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:label="us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_1" xlink:title="us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis" xlink:to="us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_1" xlink:title="Definition : us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis to us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:type="arc" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:label="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:title="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="evex_DisclosureOfSummaryOfSignificantAccountingPoliciesTable" xlink:to="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:title="Definition : evex_DisclosureOfSummaryOfSignificantAccountingPoliciesTable to us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:type="arc" use="optional" order="2" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain" xlink:label="us-gaap_RelatedPartyDomain" xlink:title="us-gaap_RelatedPartyDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:to="us-gaap_RelatedPartyDomain" xlink:title="Definition : us-gaap_RelatedPartyTransactionsByRelatedPartyAxis to us-gaap_RelatedPartyDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_EmbraerSAMember" xlink:label="evex_EmbraerSAMember" xlink:title="evex_EmbraerSAMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyDomain" xlink:to="evex_EmbraerSAMember" xlink:title="Definition : us-gaap_RelatedPartyDomain to evex_EmbraerSAMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain" xlink:label="us-gaap_RelatedPartyDomain_1" xlink:title="us-gaap_RelatedPartyDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:to="us-gaap_RelatedPartyDomain_1" xlink:title="Definition : us-gaap_RelatedPartyTransactionsByRelatedPartyAxis to us-gaap_RelatedPartyDomain" xlink:type="arc" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeStatementLocationAxis" xlink:label="us-gaap_IncomeStatementLocationAxis" xlink:title="us-gaap_IncomeStatementLocationAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="evex_DisclosureOfSummaryOfSignificantAccountingPoliciesTable" xlink:to="us-gaap_IncomeStatementLocationAxis" xlink:title="Definition : evex_DisclosureOfSummaryOfSignificantAccountingPoliciesTable to us-gaap_IncomeStatementLocationAxis" xlink:type="arc" use="optional" order="3" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeStatementLocationDomain" xlink:label="us-gaap_IncomeStatementLocationDomain" xlink:title="us-gaap_IncomeStatementLocationDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_IncomeStatementLocationAxis" xlink:to="us-gaap_IncomeStatementLocationDomain" xlink:title="Definition : us-gaap_IncomeStatementLocationAxis to us-gaap_IncomeStatementLocationDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SellingGeneralAndAdministrativeExpensesMember" xlink:label="us-gaap_SellingGeneralAndAdministrativeExpensesMember" xlink:title="us-gaap_SellingGeneralAndAdministrativeExpensesMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_IncomeStatementLocationDomain" xlink:to="us-gaap_SellingGeneralAndAdministrativeExpensesMember" xlink:title="Definition : us-gaap_IncomeStatementLocationDomain to us-gaap_SellingGeneralAndAdministrativeExpensesMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeStatementLocationDomain" xlink:label="us-gaap_IncomeStatementLocationDomain_1" xlink:title="us-gaap_IncomeStatementLocationDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_IncomeStatementLocationAxis" xlink:to="us-gaap_IncomeStatementLocationDomain_1" xlink:title="Definition : us-gaap_IncomeStatementLocationAxis to us-gaap_IncomeStatementLocationDomain" xlink:type="arc" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementBusinessSegmentsAxis" xlink:label="us-gaap_StatementBusinessSegmentsAxis" xlink:title="us-gaap_StatementBusinessSegmentsAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="evex_DisclosureOfSummaryOfSignificantAccountingPoliciesTable" xlink:to="us-gaap_StatementBusinessSegmentsAxis" xlink:title="Definition : evex_DisclosureOfSummaryOfSignificantAccountingPoliciesTable to us-gaap_StatementBusinessSegmentsAxis" xlink:type="arc" use="optional" order="4" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentDomain" xlink:label="us-gaap_SegmentDomain" xlink:title="us-gaap_SegmentDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_StatementBusinessSegmentsAxis" xlink:to="us-gaap_SegmentDomain" xlink:title="Definition : us-gaap_StatementBusinessSegmentsAxis to us-gaap_SegmentDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_EvtolMember" xlink:label="evex_EvtolMember" xlink:title="evex_EvtolMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_SegmentDomain" xlink:to="evex_EvtolMember" xlink:title="Definition : us-gaap_SegmentDomain to evex_EvtolMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentDomain" xlink:label="us-gaap_SegmentDomain_1" xlink:title="us-gaap_SegmentDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_StatementBusinessSegmentsAxis" xlink:to="us-gaap_SegmentDomain_1" xlink:title="Definition : us-gaap_StatementBusinessSegmentsAxis to us-gaap_SegmentDomain" xlink:type="arc" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PlanNameAxis" xlink:label="us-gaap_PlanNameAxis" xlink:title="us-gaap_PlanNameAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="evex_DisclosureOfSummaryOfSignificantAccountingPoliciesTable" xlink:to="us-gaap_PlanNameAxis" xlink:title="Definition : evex_DisclosureOfSummaryOfSignificantAccountingPoliciesTable to us-gaap_PlanNameAxis" xlink:type="arc" use="optional" order="5" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PlanNameDomain" xlink:label="us-gaap_PlanNameDomain" xlink:title="us-gaap_PlanNameDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_PlanNameAxis" xlink:to="us-gaap_PlanNameDomain" xlink:title="Definition : us-gaap_PlanNameAxis to us-gaap_PlanNameDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_StockIncentivePlan2022Member" xlink:label="evex_StockIncentivePlan2022Member" xlink:title="evex_StockIncentivePlan2022Member" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_PlanNameDomain" xlink:to="evex_StockIncentivePlan2022Member" xlink:title="Definition : us-gaap_PlanNameDomain to evex_StockIncentivePlan2022Member" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PlanNameDomain" xlink:label="us-gaap_PlanNameDomain_1" xlink:title="us-gaap_PlanNameDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_PlanNameAxis" xlink:to="us-gaap_PlanNameDomain_1" xlink:title="Definition : us-gaap_PlanNameAxis to us-gaap_PlanNameDomain" xlink:type="arc" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementEquityComponentsAxis" xlink:label="us-gaap_StatementEquityComponentsAxis" xlink:title="us-gaap_StatementEquityComponentsAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="evex_DisclosureOfSummaryOfSignificantAccountingPoliciesTable" xlink:to="us-gaap_StatementEquityComponentsAxis" xlink:title="Definition : evex_DisclosureOfSummaryOfSignificantAccountingPoliciesTable to us-gaap_StatementEquityComponentsAxis" xlink:type="arc" use="optional" order="6" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquityComponentDomain" xlink:label="us-gaap_EquityComponentDomain" xlink:title="us-gaap_EquityComponentDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_StatementEquityComponentsAxis" xlink:to="us-gaap_EquityComponentDomain" xlink:title="Definition : us-gaap_StatementEquityComponentsAxis to us-gaap_EquityComponentDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockMember" xlink:label="us-gaap_CommonStockMember" xlink:title="us-gaap_CommonStockMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EquityComponentDomain" xlink:to="us-gaap_CommonStockMember" xlink:title="Definition : us-gaap_EquityComponentDomain to us-gaap_CommonStockMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquityComponentDomain" xlink:label="us-gaap_EquityComponentDomain_1" xlink:title="us-gaap_EquityComponentDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_StatementEquityComponentsAxis" xlink:to="us-gaap_EquityComponentDomain_1" xlink:title="Definition : us-gaap_StatementEquityComponentsAxis to us-gaap_EquityComponentDomain" xlink:type="arc" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementClassOfStockAxis" xlink:label="us-gaap_StatementClassOfStockAxis" xlink:title="us-gaap_StatementClassOfStockAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="evex_DisclosureOfSummaryOfSignificantAccountingPoliciesTable" xlink:to="us-gaap_StatementClassOfStockAxis" xlink:title="Definition : evex_DisclosureOfSummaryOfSignificantAccountingPoliciesTable to us-gaap_StatementClassOfStockAxis" xlink:type="arc" use="optional" order="7" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfStockDomain" xlink:label="us-gaap_ClassOfStockDomain" xlink:title="us-gaap_ClassOfStockDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_StatementClassOfStockAxis" xlink:to="us-gaap_ClassOfStockDomain" xlink:title="Definition : us-gaap_StatementClassOfStockAxis to us-gaap_ClassOfStockDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonClassAMember" xlink:label="us-gaap_CommonClassAMember" xlink:title="us-gaap_CommonClassAMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ClassOfStockDomain" xlink:to="us-gaap_CommonClassAMember" xlink:title="Definition : us-gaap_ClassOfStockDomain to us-gaap_CommonClassAMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfStockDomain" xlink:label="us-gaap_ClassOfStockDomain_1" xlink:title="us-gaap_ClassOfStockDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_StatementClassOfStockAxis" xlink:to="us-gaap_ClassOfStockDomain_1" xlink:title="Definition : us-gaap_StatementClassOfStockAxis to us-gaap_ClassOfStockDomain" xlink:type="arc" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfWarrantOrRightAxis" xlink:label="us-gaap_ClassOfWarrantOrRightAxis" xlink:title="us-gaap_ClassOfWarrantOrRightAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="evex_DisclosureOfSummaryOfSignificantAccountingPoliciesTable" xlink:to="us-gaap_ClassOfWarrantOrRightAxis" xlink:title="Definition : evex_DisclosureOfSummaryOfSignificantAccountingPoliciesTable to us-gaap_ClassOfWarrantOrRightAxis" xlink:type="arc" use="optional" order="8" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfWarrantOrRightDomain" xlink:label="us-gaap_ClassOfWarrantOrRightDomain" xlink:title="us-gaap_ClassOfWarrantOrRightDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_ClassOfWarrantOrRightAxis" xlink:to="us-gaap_ClassOfWarrantOrRightDomain" xlink:title="Definition : us-gaap_ClassOfWarrantOrRightAxis to us-gaap_ClassOfWarrantOrRightDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_StrategicWarrantsMember" xlink:label="evex_StrategicWarrantsMember" xlink:title="evex_StrategicWarrantsMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ClassOfWarrantOrRightDomain" xlink:to="evex_StrategicWarrantsMember" xlink:title="Definition : us-gaap_ClassOfWarrantOrRightDomain to evex_StrategicWarrantsMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_StrategicWarrantsOneMember" xlink:label="evex_StrategicWarrantsOneMember" xlink:title="evex_StrategicWarrantsOneMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ClassOfWarrantOrRightDomain" xlink:to="evex_StrategicWarrantsOneMember" xlink:title="Definition : us-gaap_ClassOfWarrantOrRightDomain to evex_StrategicWarrantsOneMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_StrategicWarrantsTwoMember" xlink:label="evex_StrategicWarrantsTwoMember" xlink:title="evex_StrategicWarrantsTwoMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ClassOfWarrantOrRightDomain" xlink:to="evex_StrategicWarrantsTwoMember" xlink:title="Definition : us-gaap_ClassOfWarrantOrRightDomain to evex_StrategicWarrantsTwoMember" xlink:type="arc" use="optional" order="2" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_StrategicWarrantsThreeMember" xlink:label="evex_StrategicWarrantsThreeMember" xlink:title="evex_StrategicWarrantsThreeMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ClassOfWarrantOrRightDomain" xlink:to="evex_StrategicWarrantsThreeMember" xlink:title="Definition : us-gaap_ClassOfWarrantOrRightDomain to evex_StrategicWarrantsThreeMember" xlink:type="arc" use="optional" order="3" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfWarrantOrRightDomain" xlink:label="us-gaap_ClassOfWarrantOrRightDomain_1" xlink:title="us-gaap_ClassOfWarrantOrRightDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_ClassOfWarrantOrRightAxis" xlink:to="us-gaap_ClassOfWarrantOrRightDomain_1" xlink:title="Definition : us-gaap_ClassOfWarrantOrRightAxis to us-gaap_ClassOfWarrantOrRightDomain" xlink:type="arc" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AwardTypeAxis" xlink:label="us-gaap_AwardTypeAxis" xlink:title="us-gaap_AwardTypeAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="evex_DisclosureOfSummaryOfSignificantAccountingPoliciesTable" xlink:to="us-gaap_AwardTypeAxis" xlink:title="Definition : evex_DisclosureOfSummaryOfSignificantAccountingPoliciesTable to us-gaap_AwardTypeAxis" xlink:type="arc" use="optional" order="9" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:label="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:title="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_AwardTypeAxis" xlink:to="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:title="Definition : us-gaap_AwardTypeAxis to us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestrictedStockUnitsRSUMember" xlink:label="us-gaap_RestrictedStockUnitsRSUMember" xlink:title="us-gaap_RestrictedStockUnitsRSUMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:to="us-gaap_RestrictedStockUnitsRSUMember" xlink:title="Definition : us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain to us-gaap_RestrictedStockUnitsRSUMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:label="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_1" xlink:title="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_AwardTypeAxis" xlink:to="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_1" xlink:title="Definition : us-gaap_AwardTypeAxis to us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:type="arc" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeAxis" xlink:label="srt_RangeAxis" xlink:title="srt_RangeAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="evex_DisclosureOfSummaryOfSignificantAccountingPoliciesTable" xlink:to="srt_RangeAxis" xlink:title="Definition : evex_DisclosureOfSummaryOfSignificantAccountingPoliciesTable to srt_RangeAxis" xlink:type="arc" use="optional" order="10" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeMember" xlink:label="srt_RangeMember" xlink:title="srt_RangeMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="srt_RangeAxis" xlink:to="srt_RangeMember" xlink:title="Definition : srt_RangeAxis to srt_RangeMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_MinimumMember" xlink:label="srt_MinimumMember" xlink:title="srt_MinimumMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_RangeMember" xlink:to="srt_MinimumMember" xlink:title="Definition : srt_RangeMember to srt_MinimumMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_MaximumMember" xlink:label="srt_MaximumMember" xlink:title="srt_MaximumMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_RangeMember" xlink:to="srt_MaximumMember" xlink:title="Definition : srt_RangeMember to srt_MaximumMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeMember" xlink:label="srt_RangeMember_1" xlink:title="srt_RangeMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="srt_RangeAxis" xlink:to="srt_RangeMember_1" xlink:title="Definition : srt_RangeAxis to srt_RangeMember" xlink:type="arc" order="1" xbrldt:closed="false" />
  </link:definitionLink>
  <link:definitionLink xlink:type="extended" xlink:role="http://eveairmobility.com/role/ResearchandDevelopmentExpensesDetails">
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_ResearchAndDevelopmentLineItems" xlink:label="evex_ResearchAndDevelopmentLineItems" xlink:title="evex_ResearchAndDevelopmentLineItems" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_OutsourcedServiceExpense" xlink:label="evex_OutsourcedServiceExpense" xlink:title="evex_OutsourcedServiceExpense" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="evex_ResearchAndDevelopmentLineItems" xlink:to="evex_OutsourcedServiceExpense" xlink:title="Definition : evex_ResearchAndDevelopmentLineItems to evex_OutsourcedServiceExpense" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherNonrecurringIncomeExpense" xlink:label="us-gaap_OtherNonrecurringIncomeExpense" xlink:title="us-gaap_OtherNonrecurringIncomeExpense" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="evex_ResearchAndDevelopmentLineItems" xlink:to="us-gaap_OtherNonrecurringIncomeExpense" xlink:title="Definition : evex_ResearchAndDevelopmentLineItems to us-gaap_OtherNonrecurringIncomeExpense" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EmployeeBenefitsAndShareBasedCompensation" xlink:label="us-gaap_EmployeeBenefitsAndShareBasedCompensation" xlink:title="us-gaap_EmployeeBenefitsAndShareBasedCompensation" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="evex_ResearchAndDevelopmentLineItems" xlink:to="us-gaap_EmployeeBenefitsAndShareBasedCompensation" xlink:title="Definition : evex_ResearchAndDevelopmentLineItems to us-gaap_EmployeeBenefitsAndShareBasedCompensation" xlink:type="arc" use="optional" order="2" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ResearchAndDevelopmentExpense" xlink:label="us-gaap_ResearchAndDevelopmentExpense" xlink:title="us-gaap_ResearchAndDevelopmentExpense" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="evex_ResearchAndDevelopmentLineItems" xlink:to="us-gaap_ResearchAndDevelopmentExpense" xlink:title="Definition : evex_ResearchAndDevelopmentLineItems to us-gaap_ResearchAndDevelopmentExpense" xlink:type="arc" use="optional" order="3" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_ResearchAndDevelopmentTable" xlink:label="evex_ResearchAndDevelopmentTable" xlink:title="evex_ResearchAndDevelopmentTable" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="evex_ResearchAndDevelopmentLineItems" xlink:to="evex_ResearchAndDevelopmentTable" xlink:title="Definition : evex_ResearchAndDevelopmentLineItems to evex_ResearchAndDevelopmentTable" xlink:type="arc" order="4" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeStatementLocationAxis" xlink:label="us-gaap_IncomeStatementLocationAxis" xlink:title="us-gaap_IncomeStatementLocationAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="evex_ResearchAndDevelopmentTable" xlink:to="us-gaap_IncomeStatementLocationAxis" xlink:title="Definition : evex_ResearchAndDevelopmentTable to us-gaap_IncomeStatementLocationAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeStatementLocationDomain" xlink:label="us-gaap_IncomeStatementLocationDomain" xlink:title="us-gaap_IncomeStatementLocationDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_IncomeStatementLocationAxis" xlink:to="us-gaap_IncomeStatementLocationDomain" xlink:title="Definition : us-gaap_IncomeStatementLocationAxis to us-gaap_IncomeStatementLocationDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ResearchAndDevelopmentExpenseMember" xlink:label="us-gaap_ResearchAndDevelopmentExpenseMember" xlink:title="us-gaap_ResearchAndDevelopmentExpenseMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_IncomeStatementLocationDomain" xlink:to="us-gaap_ResearchAndDevelopmentExpenseMember" xlink:title="Definition : us-gaap_IncomeStatementLocationDomain to us-gaap_ResearchAndDevelopmentExpenseMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeStatementLocationDomain" xlink:label="us-gaap_IncomeStatementLocationDomain_1" xlink:title="us-gaap_IncomeStatementLocationDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_IncomeStatementLocationAxis" xlink:to="us-gaap_IncomeStatementLocationDomain_1" xlink:title="Definition : us-gaap_IncomeStatementLocationAxis to us-gaap_IncomeStatementLocationDomain" xlink:type="arc" order="1" xbrldt:closed="false" />
  </link:definitionLink>
  <link:definitionLink xlink:type="extended" xlink:role="http://eveairmobility.com/role/RelatedPartyTransactionsDetails1Textuals">
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionLineItems" xlink:label="us-gaap_RelatedPartyTransactionLineItems" xlink:title="us-gaap_RelatedPartyTransactionLineItems" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProceedsFromContributionsFromParent" xlink:label="us-gaap_ProceedsFromContributionsFromParent" xlink:title="us-gaap_ProceedsFromContributionsFromParent" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="us-gaap_ProceedsFromContributionsFromParent" xlink:title="Definition : us-gaap_RelatedPartyTransactionLineItems to us-gaap_ProceedsFromContributionsFromParent" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashAcquiredFromAcquisition" xlink:label="us-gaap_CashAcquiredFromAcquisition" xlink:title="us-gaap_CashAcquiredFromAcquisition" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="us-gaap_CashAcquiredFromAcquisition" xlink:title="Definition : us-gaap_RelatedPartyTransactionLineItems to us-gaap_CashAcquiredFromAcquisition" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_PeriodOfServiceAgreementTerm" xlink:label="evex_PeriodOfServiceAgreementTerm" xlink:title="evex_PeriodOfServiceAgreementTerm" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="evex_PeriodOfServiceAgreementTerm" xlink:title="Definition : us-gaap_RelatedPartyTransactionLineItems to evex_PeriodOfServiceAgreementTerm" xlink:type="arc" use="optional" order="2" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_PeriodOfServiceAgreementRenewalTerm" xlink:label="evex_PeriodOfServiceAgreementRenewalTerm" xlink:title="evex_PeriodOfServiceAgreementRenewalTerm" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="evex_PeriodOfServiceAgreementRenewalTerm" xlink:title="Definition : us-gaap_RelatedPartyTransactionLineItems to evex_PeriodOfServiceAgreementRenewalTerm" xlink:type="arc" use="optional" order="3" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_TransactionCostIncurred" xlink:label="evex_TransactionCostIncurred" xlink:title="evex_TransactionCostIncurred" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="evex_TransactionCostIncurred" xlink:title="Definition : us-gaap_RelatedPartyTransactionLineItems to evex_TransactionCostIncurred" xlink:type="arc" use="optional" order="4" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_TransactionCostIncurredWhichRelatedToImpactToStatementOfOperations" xlink:label="evex_TransactionCostIncurredWhichRelatedToImpactToStatementOfOperations" xlink:title="evex_TransactionCostIncurredWhichRelatedToImpactToStatementOfOperations" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="evex_TransactionCostIncurredWhichRelatedToImpactToStatementOfOperations" xlink:title="Definition : us-gaap_RelatedPartyTransactionLineItems to evex_TransactionCostIncurredWhichRelatedToImpactToStatementOfOperations" xlink:type="arc" use="optional" order="5" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_TransactionCostIncurredWhichRelatedToCarveOutPreparation" xlink:label="evex_TransactionCostIncurredWhichRelatedToCarveOutPreparation" xlink:title="evex_TransactionCostIncurredWhichRelatedToCarveOutPreparation" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="evex_TransactionCostIncurredWhichRelatedToCarveOutPreparation" xlink:title="Definition : us-gaap_RelatedPartyTransactionLineItems to evex_TransactionCostIncurredWhichRelatedToCarveOutPreparation" xlink:type="arc" use="optional" order="6" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_TransactionCostIncurredWhichRelatedToCarveOutPreparationPriorFiscalPeriod" xlink:label="evex_TransactionCostIncurredWhichRelatedToCarveOutPreparationPriorFiscalPeriod" xlink:title="evex_TransactionCostIncurredWhichRelatedToCarveOutPreparationPriorFiscalPeriod" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="evex_TransactionCostIncurredWhichRelatedToCarveOutPreparationPriorFiscalPeriod" xlink:title="Definition : us-gaap_RelatedPartyTransactionLineItems to evex_TransactionCostIncurredWhichRelatedToCarveOutPreparationPriorFiscalPeriod" xlink:type="arc" use="optional" order="7" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_TransactionCostIncurredWhichRelatedToCarveOutPreparationCurrentFiscalPeriod" xlink:label="evex_TransactionCostIncurredWhichRelatedToCarveOutPreparationCurrentFiscalPeriod" xlink:title="evex_TransactionCostIncurredWhichRelatedToCarveOutPreparationCurrentFiscalPeriod" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="evex_TransactionCostIncurredWhichRelatedToCarveOutPreparationCurrentFiscalPeriod" xlink:title="Definition : us-gaap_RelatedPartyTransactionLineItems to evex_TransactionCostIncurredWhichRelatedToCarveOutPreparationCurrentFiscalPeriod" xlink:type="arc" use="optional" order="8" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_TransactionCostRecognizedAsExpenseRelatedToCarveOutPreparation" xlink:label="evex_TransactionCostRecognizedAsExpenseRelatedToCarveOutPreparation" xlink:title="evex_TransactionCostRecognizedAsExpenseRelatedToCarveOutPreparation" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="evex_TransactionCostRecognizedAsExpenseRelatedToCarveOutPreparation" xlink:title="Definition : us-gaap_RelatedPartyTransactionLineItems to evex_TransactionCostRecognizedAsExpenseRelatedToCarveOutPreparation" xlink:type="arc" use="optional" order="9" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_TransactionCostIncurredWhichRelatedToMergerActivity" xlink:label="evex_TransactionCostIncurredWhichRelatedToMergerActivity" xlink:title="evex_TransactionCostIncurredWhichRelatedToMergerActivity" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="evex_TransactionCostIncurredWhichRelatedToMergerActivity" xlink:title="Definition : us-gaap_RelatedPartyTransactionLineItems to evex_TransactionCostIncurredWhichRelatedToMergerActivity" xlink:type="arc" use="optional" order="10" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_TransactionCostCapitalized" xlink:label="evex_TransactionCostCapitalized" xlink:title="evex_TransactionCostCapitalized" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="evex_TransactionCostCapitalized" xlink:title="Definition : us-gaap_RelatedPartyTransactionLineItems to evex_TransactionCostCapitalized" xlink:type="arc" use="optional" order="11" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_TransactionCostRecognizedAsExpenseRelatedToMergerActivity" xlink:label="evex_TransactionCostRecognizedAsExpenseRelatedToMergerActivity" xlink:title="evex_TransactionCostRecognizedAsExpenseRelatedToMergerActivity" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="evex_TransactionCostRecognizedAsExpenseRelatedToMergerActivity" xlink:title="Definition : us-gaap_RelatedPartyTransactionLineItems to evex_TransactionCostRecognizedAsExpenseRelatedToMergerActivity" xlink:type="arc" use="optional" order="12" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_TransactionCostRecognizedAsExpenseExcludingCarveOutPreparationAndMergerActivity" xlink:label="evex_TransactionCostRecognizedAsExpenseExcludingCarveOutPreparationAndMergerActivity" xlink:title="evex_TransactionCostRecognizedAsExpenseExcludingCarveOutPreparationAndMergerActivity" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="evex_TransactionCostRecognizedAsExpenseExcludingCarveOutPreparationAndMergerActivity" xlink:title="Definition : us-gaap_RelatedPartyTransactionLineItems to evex_TransactionCostRecognizedAsExpenseExcludingCarveOutPreparationAndMergerActivity" xlink:type="arc" use="optional" order="13" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_GeneralAndAdministrativeAllocationsByParent" xlink:label="evex_GeneralAndAdministrativeAllocationsByParent" xlink:title="evex_GeneralAndAdministrativeAllocationsByParent" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="evex_GeneralAndAdministrativeAllocationsByParent" xlink:title="Definition : us-gaap_RelatedPartyTransactionLineItems to evex_GeneralAndAdministrativeAllocationsByParent" xlink:type="arc" use="optional" order="14" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_ServiceAgreementFeesAndExpensesSettlementDays" xlink:label="evex_ServiceAgreementFeesAndExpensesSettlementDays" xlink:title="evex_ServiceAgreementFeesAndExpensesSettlementDays" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="evex_ServiceAgreementFeesAndExpensesSettlementDays" xlink:title="Definition : us-gaap_RelatedPartyTransactionLineItems to evex_ServiceAgreementFeesAndExpensesSettlementDays" xlink:type="arc" use="optional" order="15" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_MaximumPeriodOfServiceAgreementPaymentTerm" xlink:label="evex_MaximumPeriodOfServiceAgreementPaymentTerm" xlink:title="evex_MaximumPeriodOfServiceAgreementPaymentTerm" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="evex_MaximumPeriodOfServiceAgreementPaymentTerm" xlink:title="Definition : us-gaap_RelatedPartyTransactionLineItems to evex_MaximumPeriodOfServiceAgreementPaymentTerm" xlink:type="arc" use="optional" order="16" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_DueToRelatedPartiesFromReimbursementForMarketingExpenses" xlink:label="evex_DueToRelatedPartiesFromReimbursementForMarketingExpenses" xlink:title="evex_DueToRelatedPartiesFromReimbursementForMarketingExpenses" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="evex_DueToRelatedPartiesFromReimbursementForMarketingExpenses" xlink:title="Definition : us-gaap_RelatedPartyTransactionLineItems to evex_DueToRelatedPartiesFromReimbursementForMarketingExpenses" xlink:type="arc" use="optional" order="17" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_DueToRelatedPartiesFromReimbursementForPayrollExpensesAndInsurance" xlink:label="evex_DueToRelatedPartiesFromReimbursementForPayrollExpensesAndInsurance" xlink:title="evex_DueToRelatedPartiesFromReimbursementForPayrollExpensesAndInsurance" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="evex_DueToRelatedPartiesFromReimbursementForPayrollExpensesAndInsurance" xlink:title="Definition : us-gaap_RelatedPartyTransactionLineItems to evex_DueToRelatedPartiesFromReimbursementForPayrollExpensesAndInsurance" xlink:type="arc" use="optional" order="18" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_LoansReceivableRelatedPartiesPrincipalAmount" xlink:label="evex_LoansReceivableRelatedPartiesPrincipalAmount" xlink:title="evex_LoansReceivableRelatedPartiesPrincipalAmount" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="evex_LoansReceivableRelatedPartiesPrincipalAmount" xlink:title="Definition : us-gaap_RelatedPartyTransactionLineItems to evex_LoansReceivableRelatedPartiesPrincipalAmount" xlink:type="arc" use="optional" order="19" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_LoansReceivableRelatedPartiesAnnualInterestRate" xlink:label="evex_LoansReceivableRelatedPartiesAnnualInterestRate" xlink:title="evex_LoansReceivableRelatedPartiesAnnualInterestRate" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="evex_LoansReceivableRelatedPartiesAnnualInterestRate" xlink:title="Definition : us-gaap_RelatedPartyTransactionLineItems to evex_LoansReceivableRelatedPartiesAnnualInterestRate" xlink:type="arc" use="optional" order="20" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_TransactionCostsRecognizedAsExpenseDirectlyRelated" xlink:label="evex_TransactionCostsRecognizedAsExpenseDirectlyRelated" xlink:title="evex_TransactionCostsRecognizedAsExpenseDirectlyRelated" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="evex_TransactionCostsRecognizedAsExpenseDirectlyRelated" xlink:title="Definition : us-gaap_RelatedPartyTransactionLineItems to evex_TransactionCostsRecognizedAsExpenseDirectlyRelated" xlink:type="arc" use="optional" order="21" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_TransactionCostReimbursed" xlink:label="evex_TransactionCostReimbursed" xlink:title="evex_TransactionCostReimbursed" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="evex_TransactionCostReimbursed" xlink:title="Definition : us-gaap_RelatedPartyTransactionLineItems to evex_TransactionCostReimbursed" xlink:type="arc" use="optional" order="22" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingLeaseLiabilityNoncurrentStatementOfFinancialPositionExtensibleList" xlink:label="us-gaap_OperatingLeaseLiabilityNoncurrentStatementOfFinancialPositionExtensibleList" xlink:title="us-gaap_OperatingLeaseLiabilityNoncurrentStatementOfFinancialPositionExtensibleList" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="us-gaap_OperatingLeaseLiabilityNoncurrentStatementOfFinancialPositionExtensibleList" xlink:title="Definition : us-gaap_RelatedPartyTransactionLineItems to us-gaap_OperatingLeaseLiabilityNoncurrentStatementOfFinancialPositionExtensibleList" xlink:type="arc" use="optional" order="23" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingLeaseLiabilityNoncurrent" xlink:label="us-gaap_OperatingLeaseLiabilityNoncurrent" xlink:title="us-gaap_OperatingLeaseLiabilityNoncurrent" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="us-gaap_OperatingLeaseLiabilityNoncurrent" xlink:title="Definition : us-gaap_RelatedPartyTransactionLineItems to us-gaap_OperatingLeaseLiabilityNoncurrent" xlink:type="arc" use="optional" order="24" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingLeaseLiabilityCurrentStatementOfFinancialPositionExtensibleList" xlink:label="us-gaap_OperatingLeaseLiabilityCurrentStatementOfFinancialPositionExtensibleList" xlink:title="us-gaap_OperatingLeaseLiabilityCurrentStatementOfFinancialPositionExtensibleList" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="us-gaap_OperatingLeaseLiabilityCurrentStatementOfFinancialPositionExtensibleList" xlink:title="Definition : us-gaap_RelatedPartyTransactionLineItems to us-gaap_OperatingLeaseLiabilityCurrentStatementOfFinancialPositionExtensibleList" xlink:type="arc" use="optional" order="25" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingLeaseLiabilityCurrent" xlink:label="us-gaap_OperatingLeaseLiabilityCurrent" xlink:title="us-gaap_OperatingLeaseLiabilityCurrent" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="us-gaap_OperatingLeaseLiabilityCurrent" xlink:title="Definition : us-gaap_RelatedPartyTransactionLineItems to us-gaap_OperatingLeaseLiabilityCurrent" xlink:type="arc" use="optional" order="26" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NumberOfPropertiesSubjectToGroundLeases" xlink:label="us-gaap_NumberOfPropertiesSubjectToGroundLeases" xlink:title="us-gaap_NumberOfPropertiesSubjectToGroundLeases" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="us-gaap_NumberOfPropertiesSubjectToGroundLeases" xlink:title="Definition : us-gaap_RelatedPartyTransactionLineItems to us-gaap_NumberOfPropertiesSubjectToGroundLeases" xlink:type="arc" use="optional" order="27" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingLeaseCost" xlink:label="us-gaap_OperatingLeaseCost" xlink:title="us-gaap_OperatingLeaseCost" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="us-gaap_OperatingLeaseCost" xlink:title="Definition : us-gaap_RelatedPartyTransactionLineItems to us-gaap_OperatingLeaseCost" xlink:type="arc" use="optional" order="28" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_PeriodOfLoanAgreementTerm" xlink:label="evex_PeriodOfLoanAgreementTerm" xlink:title="evex_PeriodOfLoanAgreementTerm" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="evex_PeriodOfLoanAgreementTerm" xlink:title="Definition : us-gaap_RelatedPartyTransactionLineItems to evex_PeriodOfLoanAgreementTerm" xlink:type="arc" use="optional" order="29" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_PeriodOfLoanAgreementRenewalTerm" xlink:label="evex_PeriodOfLoanAgreementRenewalTerm" xlink:title="evex_PeriodOfLoanAgreementRenewalTerm" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="evex_PeriodOfLoanAgreementRenewalTerm" xlink:title="Definition : us-gaap_RelatedPartyTransactionLineItems to evex_PeriodOfLoanAgreementRenewalTerm" xlink:type="arc" use="optional" order="30" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProvisionForLoanLossesExpensed" xlink:label="us-gaap_ProvisionForLoanLossesExpensed" xlink:title="us-gaap_ProvisionForLoanLossesExpensed" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="us-gaap_ProvisionForLoanLossesExpensed" xlink:title="Definition : us-gaap_RelatedPartyTransactionLineItems to us-gaap_ProvisionForLoanLossesExpensed" xlink:type="arc" use="optional" order="31" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubsidiaryOrEquityMethodInvesteeCumulativePercentageOwnershipAfterAllTransactions" xlink:label="us-gaap_SubsidiaryOrEquityMethodInvesteeCumulativePercentageOwnershipAfterAllTransactions" xlink:title="us-gaap_SubsidiaryOrEquityMethodInvesteeCumulativePercentageOwnershipAfterAllTransactions" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="us-gaap_SubsidiaryOrEquityMethodInvesteeCumulativePercentageOwnershipAfterAllTransactions" xlink:title="Definition : us-gaap_RelatedPartyTransactionLineItems to us-gaap_SubsidiaryOrEquityMethodInvesteeCumulativePercentageOwnershipAfterAllTransactions" xlink:type="arc" use="optional" order="32" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquityMethodInvestmentOwnershipPercentage" xlink:label="us-gaap_EquityMethodInvestmentOwnershipPercentage" xlink:title="us-gaap_EquityMethodInvestmentOwnershipPercentage" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="us-gaap_EquityMethodInvestmentOwnershipPercentage" xlink:title="Definition : us-gaap_RelatedPartyTransactionLineItems to us-gaap_EquityMethodInvestmentOwnershipPercentage" xlink:type="arc" use="optional" order="33" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SaleOfStockConsiderationReceivedPerTransaction" xlink:label="us-gaap_SaleOfStockConsiderationReceivedPerTransaction" xlink:title="us-gaap_SaleOfStockConsiderationReceivedPerTransaction" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="us-gaap_SaleOfStockConsiderationReceivedPerTransaction" xlink:title="Definition : us-gaap_RelatedPartyTransactionLineItems to us-gaap_SaleOfStockConsiderationReceivedPerTransaction" xlink:type="arc" use="optional" order="34" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction" xlink:label="us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction" xlink:title="us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction" xlink:title="Definition : us-gaap_RelatedPartyTransactionLineItems to us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction" xlink:type="arc" use="optional" order="35" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LoansAndLeasesReceivableRelatedPartiesProceeds" xlink:label="us-gaap_LoansAndLeasesReceivableRelatedPartiesProceeds" xlink:title="us-gaap_LoansAndLeasesReceivableRelatedPartiesProceeds" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="us-gaap_LoansAndLeasesReceivableRelatedPartiesProceeds" xlink:title="Definition : us-gaap_RelatedPartyTransactionLineItems to us-gaap_LoansAndLeasesReceivableRelatedPartiesProceeds" xlink:type="arc" use="optional" order="36" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_LesseeOperatingLeaseLeaseNotYetCommencedNumberOfLeases" xlink:label="evex_LesseeOperatingLeaseLeaseNotYetCommencedNumberOfLeases" xlink:title="evex_LesseeOperatingLeaseLeaseNotYetCommencedNumberOfLeases" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="evex_LesseeOperatingLeaseLeaseNotYetCommencedNumberOfLeases" xlink:title="Definition : us-gaap_RelatedPartyTransactionLineItems to evex_LesseeOperatingLeaseLeaseNotYetCommencedNumberOfLeases" xlink:type="arc" use="optional" order="37" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionTermsAndMannerOfSettlement" xlink:label="us-gaap_RelatedPartyTransactionTermsAndMannerOfSettlement" xlink:title="us-gaap_RelatedPartyTransactionTermsAndMannerOfSettlement" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="us-gaap_RelatedPartyTransactionTermsAndMannerOfSettlement" xlink:title="Definition : us-gaap_RelatedPartyTransactionLineItems to us-gaap_RelatedPartyTransactionTermsAndMannerOfSettlement" xlink:type="arc" use="optional" order="38" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingLeaseRightOfUseAsset" xlink:label="us-gaap_OperatingLeaseRightOfUseAsset" xlink:title="us-gaap_OperatingLeaseRightOfUseAsset" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="us-gaap_OperatingLeaseRightOfUseAsset" xlink:title="Definition : us-gaap_RelatedPartyTransactionLineItems to us-gaap_OperatingLeaseRightOfUseAsset" xlink:type="arc" use="optional" order="39" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:label="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:title="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:title="Definition : us-gaap_RelatedPartyTransactionLineItems to us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:type="arc" order="40" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubsidiarySaleOfStockAxis" xlink:label="us-gaap_SubsidiarySaleOfStockAxis" xlink:title="us-gaap_SubsidiarySaleOfStockAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:to="us-gaap_SubsidiarySaleOfStockAxis" xlink:title="Definition : us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable to us-gaap_SubsidiarySaleOfStockAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SaleOfStockNameOfTransactionDomain" xlink:label="us-gaap_SaleOfStockNameOfTransactionDomain" xlink:title="us-gaap_SaleOfStockNameOfTransactionDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_SubsidiarySaleOfStockAxis" xlink:to="us-gaap_SaleOfStockNameOfTransactionDomain" xlink:title="Definition : us-gaap_SubsidiarySaleOfStockAxis to us-gaap_SaleOfStockNameOfTransactionDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PrivatePlacementMember" xlink:label="us-gaap_PrivatePlacementMember" xlink:title="us-gaap_PrivatePlacementMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_SaleOfStockNameOfTransactionDomain" xlink:to="us-gaap_PrivatePlacementMember" xlink:title="Definition : us-gaap_SaleOfStockNameOfTransactionDomain to us-gaap_PrivatePlacementMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_RegisteredDirectOfferingMember" xlink:label="evex_RegisteredDirectOfferingMember" xlink:title="evex_RegisteredDirectOfferingMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_SaleOfStockNameOfTransactionDomain" xlink:to="evex_RegisteredDirectOfferingMember" xlink:title="Definition : us-gaap_SaleOfStockNameOfTransactionDomain to evex_RegisteredDirectOfferingMember" xlink:type="arc" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SaleOfStockNameOfTransactionDomain" xlink:label="us-gaap_SaleOfStockNameOfTransactionDomain_1" xlink:title="us-gaap_SaleOfStockNameOfTransactionDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_SubsidiarySaleOfStockAxis" xlink:to="us-gaap_SaleOfStockNameOfTransactionDomain_1" xlink:title="Definition : us-gaap_SubsidiarySaleOfStockAxis to us-gaap_SaleOfStockNameOfTransactionDomain" xlink:type="arc" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:title="dei_LegalEntityAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:to="dei_LegalEntityAxis" xlink:title="Definition : us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable to dei_LegalEntityAxis" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:title="dei_EntityDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:title="Definition : dei_LegalEntityAxis to dei_EntityDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_ZaniteAcquisitionCorpMember" xlink:label="evex_ZaniteAcquisitionCorpMember" xlink:title="evex_ZaniteAcquisitionCorpMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_EntityDomain" xlink:to="evex_ZaniteAcquisitionCorpMember" xlink:title="Definition : dei_EntityDomain to evex_ZaniteAcquisitionCorpMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_EveBrazilMember" xlink:label="evex_EveBrazilMember" xlink:title="evex_EveBrazilMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_EntityDomain" xlink:to="evex_EveBrazilMember" xlink:title="Definition : dei_EntityDomain to evex_EveBrazilMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain_1" xlink:title="dei_EntityDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain_1" xlink:title="Definition : dei_LegalEntityAxis to dei_EntityDomain" xlink:type="arc" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:label="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:title="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:to="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:title="Definition : us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable to us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:type="arc" use="optional" order="2" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain" xlink:label="us-gaap_RelatedPartyDomain" xlink:title="us-gaap_RelatedPartyDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:to="us-gaap_RelatedPartyDomain" xlink:title="Definition : us-gaap_RelatedPartyTransactionsByRelatedPartyAxis to us-gaap_RelatedPartyDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_EmbraerSAMember" xlink:label="evex_EmbraerSAMember" xlink:title="evex_EmbraerSAMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyDomain" xlink:to="evex_EmbraerSAMember" xlink:title="Definition : us-gaap_RelatedPartyDomain to evex_EmbraerSAMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_AtechMember" xlink:label="evex_AtechMember" xlink:title="evex_AtechMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyDomain" xlink:to="evex_AtechMember" xlink:title="Definition : us-gaap_RelatedPartyDomain to evex_AtechMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_EmbraerAircraftHoldingIncMember" xlink:label="evex_EmbraerAircraftHoldingIncMember" xlink:title="evex_EmbraerAircraftHoldingIncMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyDomain" xlink:to="evex_EmbraerAircraftHoldingIncMember" xlink:title="Definition : us-gaap_RelatedPartyDomain to evex_EmbraerAircraftHoldingIncMember" xlink:type="arc" use="optional" order="2" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_OtherRelatedPartiesMember" xlink:label="evex_OtherRelatedPartiesMember" xlink:title="evex_OtherRelatedPartiesMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyDomain" xlink:to="evex_OtherRelatedPartiesMember" xlink:title="Definition : us-gaap_RelatedPartyDomain to evex_OtherRelatedPartiesMember" xlink:type="arc" use="optional" order="3" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_EmbraerAircraftHoldingIncAndOtherRelatedPartiesMember" xlink:label="evex_EmbraerAircraftHoldingIncAndOtherRelatedPartiesMember" xlink:title="evex_EmbraerAircraftHoldingIncAndOtherRelatedPartiesMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyDomain" xlink:to="evex_EmbraerAircraftHoldingIncAndOtherRelatedPartiesMember" xlink:title="Definition : us-gaap_RelatedPartyDomain to evex_EmbraerAircraftHoldingIncAndOtherRelatedPartiesMember" xlink:type="arc" use="optional" order="4" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyMember" xlink:label="us-gaap_RelatedPartyMember" xlink:title="us-gaap_RelatedPartyMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyDomain" xlink:to="us-gaap_RelatedPartyMember" xlink:title="Definition : us-gaap_RelatedPartyDomain to us-gaap_RelatedPartyMember" xlink:type="arc" use="optional" order="5" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain" xlink:label="us-gaap_RelatedPartyDomain_1" xlink:title="us-gaap_RelatedPartyDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:to="us-gaap_RelatedPartyDomain_1" xlink:title="Definition : us-gaap_RelatedPartyTransactionsByRelatedPartyAxis to us-gaap_RelatedPartyDomain" xlink:type="arc" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis" xlink:label="srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis" xlink:title="srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:to="srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis" xlink:title="Definition : us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable to srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis" xlink:type="arc" use="optional" order="3" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_EquityMethodInvesteeNameDomain" xlink:label="srt_EquityMethodInvesteeNameDomain" xlink:title="srt_EquityMethodInvesteeNameDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis" xlink:to="srt_EquityMethodInvesteeNameDomain" xlink:title="Definition : srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis to srt_EquityMethodInvesteeNameDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_NidecAerospaceMember" xlink:label="evex_NidecAerospaceMember" xlink:title="evex_NidecAerospaceMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="evex_NidecAerospaceMember" xlink:title="Definition : srt_EquityMethodInvesteeNameDomain to evex_NidecAerospaceMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_EquityMethodInvesteeNameDomain" xlink:label="srt_EquityMethodInvesteeNameDomain_1" xlink:title="srt_EquityMethodInvesteeNameDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis" xlink:to="srt_EquityMethodInvesteeNameDomain_1" xlink:title="Definition : srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis to srt_EquityMethodInvesteeNameDomain" xlink:type="arc" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeStatementLocationAxis" xlink:label="us-gaap_IncomeStatementLocationAxis" xlink:title="us-gaap_IncomeStatementLocationAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:to="us-gaap_IncomeStatementLocationAxis" xlink:title="Definition : us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable to us-gaap_IncomeStatementLocationAxis" xlink:type="arc" use="optional" order="4" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeStatementLocationDomain" xlink:label="us-gaap_IncomeStatementLocationDomain" xlink:title="us-gaap_IncomeStatementLocationDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_IncomeStatementLocationAxis" xlink:to="us-gaap_IncomeStatementLocationDomain" xlink:title="Definition : us-gaap_IncomeStatementLocationAxis to us-gaap_IncomeStatementLocationDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SellingGeneralAndAdministrativeExpensesMember" xlink:label="us-gaap_SellingGeneralAndAdministrativeExpensesMember" xlink:title="us-gaap_SellingGeneralAndAdministrativeExpensesMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_IncomeStatementLocationDomain" xlink:to="us-gaap_SellingGeneralAndAdministrativeExpensesMember" xlink:title="Definition : us-gaap_IncomeStatementLocationDomain to us-gaap_SellingGeneralAndAdministrativeExpensesMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ResearchAndDevelopmentExpenseMember" xlink:label="us-gaap_ResearchAndDevelopmentExpenseMember" xlink:title="us-gaap_ResearchAndDevelopmentExpenseMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_IncomeStatementLocationDomain" xlink:to="us-gaap_ResearchAndDevelopmentExpenseMember" xlink:title="Definition : us-gaap_IncomeStatementLocationDomain to us-gaap_ResearchAndDevelopmentExpenseMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeStatementLocationDomain" xlink:label="us-gaap_IncomeStatementLocationDomain_1" xlink:title="us-gaap_IncomeStatementLocationDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_IncomeStatementLocationAxis" xlink:to="us-gaap_IncomeStatementLocationDomain_1" xlink:title="Definition : us-gaap_IncomeStatementLocationAxis to us-gaap_IncomeStatementLocationDomain" xlink:type="arc" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeAxis" xlink:label="srt_RangeAxis" xlink:title="srt_RangeAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:to="srt_RangeAxis" xlink:title="Definition : us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable to srt_RangeAxis" xlink:type="arc" use="optional" order="5" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeMember" xlink:label="srt_RangeMember" xlink:title="srt_RangeMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="srt_RangeAxis" xlink:to="srt_RangeMember" xlink:title="Definition : srt_RangeAxis to srt_RangeMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_MinimumMember" xlink:label="srt_MinimumMember" xlink:title="srt_MinimumMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_RangeMember" xlink:to="srt_MinimumMember" xlink:title="Definition : srt_RangeMember to srt_MinimumMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeMember" xlink:label="srt_RangeMember_1" xlink:title="srt_RangeMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="srt_RangeAxis" xlink:to="srt_RangeMember_1" xlink:title="Definition : srt_RangeAxis to srt_RangeMember" xlink:type="arc" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_AgreementAxis" xlink:label="evex_AgreementAxis" xlink:title="evex_AgreementAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:to="evex_AgreementAxis" xlink:title="Definition : us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable to evex_AgreementAxis" xlink:type="arc" use="optional" order="6" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_AgreementDomain" xlink:label="evex_AgreementDomain" xlink:title="evex_AgreementDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="evex_AgreementAxis" xlink:to="evex_AgreementDomain" xlink:title="Definition : evex_AgreementAxis to evex_AgreementDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_MasterServiceAgreementMember" xlink:label="evex_MasterServiceAgreementMember" xlink:title="evex_MasterServiceAgreementMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="evex_AgreementDomain" xlink:to="evex_MasterServiceAgreementMember" xlink:title="Definition : evex_AgreementDomain to evex_MasterServiceAgreementMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_SharedServiceAgreementMember" xlink:label="evex_SharedServiceAgreementMember" xlink:title="evex_SharedServiceAgreementMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="evex_AgreementDomain" xlink:to="evex_SharedServiceAgreementMember" xlink:title="Definition : evex_AgreementDomain to evex_SharedServiceAgreementMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_AgreementDomain" xlink:label="evex_AgreementDomain_1" xlink:title="evex_AgreementDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="evex_AgreementAxis" xlink:to="evex_AgreementDomain_1" xlink:title="Definition : evex_AgreementAxis to evex_AgreementDomain" xlink:type="arc" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidatedEntitiesAxis" xlink:label="srt_ConsolidatedEntitiesAxis" xlink:title="srt_ConsolidatedEntitiesAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:to="srt_ConsolidatedEntitiesAxis" xlink:title="Definition : us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable to srt_ConsolidatedEntitiesAxis" xlink:type="arc" use="optional" order="7" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidatedEntitiesDomain" xlink:label="srt_ConsolidatedEntitiesDomain" xlink:title="srt_ConsolidatedEntitiesDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="srt_ConsolidatedEntitiesAxis" xlink:to="srt_ConsolidatedEntitiesDomain" xlink:title="Definition : srt_ConsolidatedEntitiesAxis to srt_ConsolidatedEntitiesDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ParentCompanyMember" xlink:label="srt_ParentCompanyMember" xlink:title="srt_ParentCompanyMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_ConsolidatedEntitiesDomain" xlink:to="srt_ParentCompanyMember" xlink:title="Definition : srt_ConsolidatedEntitiesDomain to srt_ParentCompanyMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidatedEntitiesDomain" xlink:label="srt_ConsolidatedEntitiesDomain_1" xlink:title="srt_ConsolidatedEntitiesDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="srt_ConsolidatedEntitiesAxis" xlink:to="srt_ConsolidatedEntitiesDomain_1" xlink:title="Definition : srt_ConsolidatedEntitiesAxis to srt_ConsolidatedEntitiesDomain" xlink:type="arc" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PlanNameAxis" xlink:label="us-gaap_PlanNameAxis" xlink:title="us-gaap_PlanNameAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:to="us-gaap_PlanNameAxis" xlink:title="Definition : us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable to us-gaap_PlanNameAxis" xlink:type="arc" use="optional" order="8" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PlanNameDomain" xlink:label="us-gaap_PlanNameDomain" xlink:title="us-gaap_PlanNameDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_PlanNameAxis" xlink:to="us-gaap_PlanNameDomain" xlink:title="Definition : us-gaap_PlanNameAxis to us-gaap_PlanNameDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_StockIncentivePlan2022Member" xlink:label="evex_StockIncentivePlan2022Member" xlink:title="evex_StockIncentivePlan2022Member" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_PlanNameDomain" xlink:to="evex_StockIncentivePlan2022Member" xlink:title="Definition : us-gaap_PlanNameDomain to evex_StockIncentivePlan2022Member" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PlanNameDomain" xlink:label="us-gaap_PlanNameDomain_1" xlink:title="us-gaap_PlanNameDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_PlanNameAxis" xlink:to="us-gaap_PlanNameDomain_1" xlink:title="Definition : us-gaap_PlanNameAxis to us-gaap_PlanNameDomain" xlink:type="arc" order="1" xbrldt:closed="false" />
  </link:definitionLink>
  <link:definitionLink xlink:type="extended" xlink:role="http://eveairmobility.com/role/DocumentandEntityInformation">
    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationLineItems" xlink:label="dei_DocumentInformationLineItems" xlink:title="dei_DocumentInformationLineItems" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentType" xlink:label="dei_DocumentType" xlink:title="dei_DocumentType" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_DocumentType" xlink:title="Definition : dei_DocumentInformationLineItems to dei_DocumentType" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_AmendmentFlag" xlink:label="dei_AmendmentFlag" xlink:title="dei_AmendmentFlag" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_AmendmentFlag" xlink:title="Definition : dei_DocumentInformationLineItems to dei_AmendmentFlag" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentQuarterlyReport" xlink:label="dei_DocumentQuarterlyReport" xlink:title="dei_DocumentQuarterlyReport" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_DocumentQuarterlyReport" xlink:title="Definition : dei_DocumentInformationLineItems to dei_DocumentQuarterlyReport" xlink:type="arc" use="optional" order="2" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentTransitionReport" xlink:label="dei_DocumentTransitionReport" xlink:title="dei_DocumentTransitionReport" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_DocumentTransitionReport" xlink:title="Definition : dei_DocumentInformationLineItems to dei_DocumentTransitionReport" xlink:type="arc" use="optional" order="3" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentPeriodEndDate" xlink:label="dei_DocumentPeriodEndDate" xlink:title="dei_DocumentPeriodEndDate" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_DocumentPeriodEndDate" xlink:title="Definition : dei_DocumentInformationLineItems to dei_DocumentPeriodEndDate" xlink:type="arc" use="optional" order="4" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentFiscalYearFocus" xlink:label="dei_DocumentFiscalYearFocus" xlink:title="dei_DocumentFiscalYearFocus" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_DocumentFiscalYearFocus" xlink:title="Definition : dei_DocumentInformationLineItems to dei_DocumentFiscalYearFocus" xlink:type="arc" use="optional" order="5" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentFiscalPeriodFocus" xlink:label="dei_DocumentFiscalPeriodFocus" xlink:title="dei_DocumentFiscalPeriodFocus" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_DocumentFiscalPeriodFocus" xlink:title="Definition : dei_DocumentInformationLineItems to dei_DocumentFiscalPeriodFocus" xlink:type="arc" use="optional" order="6" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityRegistrantName" xlink:label="dei_EntityRegistrantName" xlink:title="dei_EntityRegistrantName" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_EntityRegistrantName" xlink:title="Definition : dei_DocumentInformationLineItems to dei_EntityRegistrantName" xlink:type="arc" use="optional" order="7" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityCentralIndexKey" xlink:label="dei_EntityCentralIndexKey" xlink:title="dei_EntityCentralIndexKey" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_EntityCentralIndexKey" xlink:title="Definition : dei_DocumentInformationLineItems to dei_EntityCentralIndexKey" xlink:type="arc" use="optional" order="8" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_CurrentFiscalYearEndDate" xlink:label="dei_CurrentFiscalYearEndDate" xlink:title="dei_CurrentFiscalYearEndDate" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_CurrentFiscalYearEndDate" xlink:title="Definition : dei_DocumentInformationLineItems to dei_CurrentFiscalYearEndDate" xlink:type="arc" use="optional" order="9" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityFileNumber" xlink:label="dei_EntityFileNumber" xlink:title="dei_EntityFileNumber" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_EntityFileNumber" xlink:title="Definition : dei_DocumentInformationLineItems to dei_EntityFileNumber" xlink:type="arc" use="optional" order="10" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityIncorporationStateCountryCode" xlink:label="dei_EntityIncorporationStateCountryCode" xlink:title="dei_EntityIncorporationStateCountryCode" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_EntityIncorporationStateCountryCode" xlink:title="Definition : dei_DocumentInformationLineItems to dei_EntityIncorporationStateCountryCode" xlink:type="arc" use="optional" order="11" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityTaxIdentificationNumber" xlink:label="dei_EntityTaxIdentificationNumber" xlink:title="dei_EntityTaxIdentificationNumber" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_EntityTaxIdentificationNumber" xlink:title="Definition : dei_DocumentInformationLineItems to dei_EntityTaxIdentificationNumber" xlink:type="arc" use="optional" order="12" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityAddressAddressLine1" xlink:label="dei_EntityAddressAddressLine1" xlink:title="dei_EntityAddressAddressLine1" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_EntityAddressAddressLine1" xlink:title="Definition : dei_DocumentInformationLineItems to dei_EntityAddressAddressLine1" xlink:type="arc" use="optional" order="13" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityAddressCityOrTown" xlink:label="dei_EntityAddressCityOrTown" xlink:title="dei_EntityAddressCityOrTown" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_EntityAddressCityOrTown" xlink:title="Definition : dei_DocumentInformationLineItems to dei_EntityAddressCityOrTown" xlink:type="arc" use="optional" order="14" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityAddressStateOrProvince" xlink:label="dei_EntityAddressStateOrProvince" xlink:title="dei_EntityAddressStateOrProvince" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_EntityAddressStateOrProvince" xlink:title="Definition : dei_DocumentInformationLineItems to dei_EntityAddressStateOrProvince" xlink:type="arc" use="optional" order="15" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityAddressPostalZipCode" xlink:label="dei_EntityAddressPostalZipCode" xlink:title="dei_EntityAddressPostalZipCode" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_EntityAddressPostalZipCode" xlink:title="Definition : dei_DocumentInformationLineItems to dei_EntityAddressPostalZipCode" xlink:type="arc" use="optional" order="16" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_CityAreaCode" xlink:label="dei_CityAreaCode" xlink:title="dei_CityAreaCode" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_CityAreaCode" xlink:title="Definition : dei_DocumentInformationLineItems to dei_CityAreaCode" xlink:type="arc" use="optional" order="17" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LocalPhoneNumber" xlink:label="dei_LocalPhoneNumber" xlink:title="dei_LocalPhoneNumber" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_LocalPhoneNumber" xlink:title="Definition : dei_DocumentInformationLineItems to dei_LocalPhoneNumber" xlink:type="arc" use="optional" order="18" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityWellKnownSeasonedIssuer" xlink:label="dei_EntityWellKnownSeasonedIssuer" xlink:title="dei_EntityWellKnownSeasonedIssuer" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_EntityWellKnownSeasonedIssuer" xlink:title="Definition : dei_DocumentInformationLineItems to dei_EntityWellKnownSeasonedIssuer" xlink:type="arc" use="optional" order="19" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityVoluntaryFilers" xlink:label="dei_EntityVoluntaryFilers" xlink:title="dei_EntityVoluntaryFilers" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_EntityVoluntaryFilers" xlink:title="Definition : dei_DocumentInformationLineItems to dei_EntityVoluntaryFilers" xlink:type="arc" use="optional" order="20" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityCurrentReportingStatus" xlink:label="dei_EntityCurrentReportingStatus" xlink:title="dei_EntityCurrentReportingStatus" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_EntityCurrentReportingStatus" xlink:title="Definition : dei_DocumentInformationLineItems to dei_EntityCurrentReportingStatus" xlink:type="arc" use="optional" order="21" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityInteractiveDataCurrent" xlink:label="dei_EntityInteractiveDataCurrent" xlink:title="dei_EntityInteractiveDataCurrent" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_EntityInteractiveDataCurrent" xlink:title="Definition : dei_DocumentInformationLineItems to dei_EntityInteractiveDataCurrent" xlink:type="arc" use="optional" order="22" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityFilerCategory" xlink:label="dei_EntityFilerCategory" xlink:title="dei_EntityFilerCategory" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_EntityFilerCategory" xlink:title="Definition : dei_DocumentInformationLineItems to dei_EntityFilerCategory" xlink:type="arc" use="optional" order="23" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntitySmallBusiness" xlink:label="dei_EntitySmallBusiness" xlink:title="dei_EntitySmallBusiness" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_EntitySmallBusiness" xlink:title="Definition : dei_DocumentInformationLineItems to dei_EntitySmallBusiness" xlink:type="arc" use="optional" order="24" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityEmergingGrowthCompany" xlink:label="dei_EntityEmergingGrowthCompany" xlink:title="dei_EntityEmergingGrowthCompany" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_EntityEmergingGrowthCompany" xlink:title="Definition : dei_DocumentInformationLineItems to dei_EntityEmergingGrowthCompany" xlink:type="arc" use="optional" order="25" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityExTransitionPeriod" xlink:label="dei_EntityExTransitionPeriod" xlink:title="dei_EntityExTransitionPeriod" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_EntityExTransitionPeriod" xlink:title="Definition : dei_DocumentInformationLineItems to dei_EntityExTransitionPeriod" xlink:type="arc" use="optional" order="26" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_IcfrAuditorAttestationFlag" xlink:label="dei_IcfrAuditorAttestationFlag" xlink:title="dei_IcfrAuditorAttestationFlag" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_IcfrAuditorAttestationFlag" xlink:title="Definition : dei_DocumentInformationLineItems to dei_IcfrAuditorAttestationFlag" xlink:type="arc" use="optional" order="27" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentFinStmtErrorCorrectionFlag" xlink:label="dei_DocumentFinStmtErrorCorrectionFlag" xlink:title="dei_DocumentFinStmtErrorCorrectionFlag" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_DocumentFinStmtErrorCorrectionFlag" xlink:title="Definition : dei_DocumentInformationLineItems to dei_DocumentFinStmtErrorCorrectionFlag" xlink:type="arc" use="optional" order="28" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentFinStmtRestatementRecoveryAnalysisFlag" xlink:label="dei_DocumentFinStmtRestatementRecoveryAnalysisFlag" xlink:title="dei_DocumentFinStmtRestatementRecoveryAnalysisFlag" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_DocumentFinStmtRestatementRecoveryAnalysisFlag" xlink:title="Definition : dei_DocumentInformationLineItems to dei_DocumentFinStmtRestatementRecoveryAnalysisFlag" xlink:type="arc" use="optional" order="29" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityShellCompany" xlink:label="dei_EntityShellCompany" xlink:title="dei_EntityShellCompany" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_EntityShellCompany" xlink:title="Definition : dei_DocumentInformationLineItems to dei_EntityShellCompany" xlink:type="arc" use="optional" order="30" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityPublicFloat" xlink:label="dei_EntityPublicFloat" xlink:title="dei_EntityPublicFloat" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_EntityPublicFloat" xlink:title="Definition : dei_DocumentInformationLineItems to dei_EntityPublicFloat" xlink:type="arc" use="optional" order="31" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_AuditorFirmId" xlink:label="dei_AuditorFirmId" xlink:title="dei_AuditorFirmId" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_AuditorFirmId" xlink:title="Definition : dei_DocumentInformationLineItems to dei_AuditorFirmId" xlink:type="arc" use="optional" order="32" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_AuditorLocation" xlink:label="dei_AuditorLocation" xlink:title="dei_AuditorLocation" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_AuditorLocation" xlink:title="Definition : dei_DocumentInformationLineItems to dei_AuditorLocation" xlink:type="arc" use="optional" order="33" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_AuditorName" xlink:label="dei_AuditorName" xlink:title="dei_AuditorName" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_AuditorName" xlink:title="Definition : dei_DocumentInformationLineItems to dei_AuditorName" xlink:type="arc" use="optional" order="34" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityCommonStockSharesOutstanding" xlink:label="dei_EntityCommonStockSharesOutstanding" xlink:title="dei_EntityCommonStockSharesOutstanding" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_EntityCommonStockSharesOutstanding" xlink:title="Definition : dei_DocumentInformationLineItems to dei_EntityCommonStockSharesOutstanding" xlink:type="arc" use="optional" order="35" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_Security12bTitle" xlink:label="dei_Security12bTitle" xlink:title="dei_Security12bTitle" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_Security12bTitle" xlink:title="Definition : dei_DocumentInformationLineItems to dei_Security12bTitle" xlink:type="arc" use="optional" order="36" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_TradingSymbol" xlink:label="dei_TradingSymbol" xlink:title="dei_TradingSymbol" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_TradingSymbol" xlink:title="Definition : dei_DocumentInformationLineItems to dei_TradingSymbol" xlink:type="arc" use="optional" order="37" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_SecurityExchangeName" xlink:label="dei_SecurityExchangeName" xlink:title="dei_SecurityExchangeName" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_SecurityExchangeName" xlink:title="Definition : dei_DocumentInformationLineItems to dei_SecurityExchangeName" xlink:type="arc" use="optional" order="38" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationTable" xlink:label="dei_DocumentInformationTable" xlink:title="dei_DocumentInformationTable" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_DocumentInformationTable" xlink:title="Definition : dei_DocumentInformationLineItems to dei_DocumentInformationTable" xlink:type="arc" order="39" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementEquityComponentsAxis" xlink:label="us-gaap_StatementEquityComponentsAxis" xlink:title="us-gaap_StatementEquityComponentsAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="dei_DocumentInformationTable" xlink:to="us-gaap_StatementEquityComponentsAxis" xlink:title="Definition : dei_DocumentInformationTable to us-gaap_StatementEquityComponentsAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquityComponentDomain" xlink:label="us-gaap_EquityComponentDomain" xlink:title="us-gaap_EquityComponentDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_StatementEquityComponentsAxis" xlink:to="us-gaap_EquityComponentDomain" xlink:title="Definition : us-gaap_StatementEquityComponentsAxis to us-gaap_EquityComponentDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockMember" xlink:label="us-gaap_CommonStockMember" xlink:title="us-gaap_CommonStockMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EquityComponentDomain" xlink:to="us-gaap_CommonStockMember" xlink:title="Definition : us-gaap_EquityComponentDomain to us-gaap_CommonStockMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_WarrantMember" xlink:label="us-gaap_WarrantMember" xlink:title="us-gaap_WarrantMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EquityComponentDomain" xlink:to="us-gaap_WarrantMember" xlink:title="Definition : us-gaap_EquityComponentDomain to us-gaap_WarrantMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquityComponentDomain" xlink:label="us-gaap_EquityComponentDomain_1" xlink:title="us-gaap_EquityComponentDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_StatementEquityComponentsAxis" xlink:to="us-gaap_EquityComponentDomain_1" xlink:title="Definition : us-gaap_StatementEquityComponentsAxis to us-gaap_EquityComponentDomain" xlink:type="arc" order="1" xbrldt:closed="false" />
  </link:definitionLink>
  <link:definitionLink xlink:type="extended" xlink:role="http://eveairmobility.com/role/OtherBalanceSheetComponentsDetails">
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentLineItems" xlink:label="us-gaap_PropertyPlantAndEquipmentLineItems" xlink:title="us-gaap_PropertyPlantAndEquipmentLineItems" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentGross" xlink:label="us-gaap_PropertyPlantAndEquipmentGross" xlink:title="us-gaap_PropertyPlantAndEquipmentGross" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_PropertyPlantAndEquipmentLineItems" xlink:to="us-gaap_PropertyPlantAndEquipmentGross" xlink:title="Definition : us-gaap_PropertyPlantAndEquipmentLineItems to us-gaap_PropertyPlantAndEquipmentGross" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment" xlink:label="us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment" xlink:title="us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_PropertyPlantAndEquipmentLineItems" xlink:to="us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment" xlink:title="Definition : us-gaap_PropertyPlantAndEquipmentLineItems to us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentNet" xlink:label="us-gaap_PropertyPlantAndEquipmentNet" xlink:title="us-gaap_PropertyPlantAndEquipmentNet" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_PropertyPlantAndEquipmentLineItems" xlink:to="us-gaap_PropertyPlantAndEquipmentNet" xlink:title="Definition : us-gaap_PropertyPlantAndEquipmentLineItems to us-gaap_PropertyPlantAndEquipmentNet" xlink:type="arc" use="optional" order="2" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfPropertyPlantAndEquipmentTable" xlink:label="us-gaap_ScheduleOfPropertyPlantAndEquipmentTable" xlink:title="us-gaap_ScheduleOfPropertyPlantAndEquipmentTable" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="us-gaap_PropertyPlantAndEquipmentLineItems" xlink:to="us-gaap_ScheduleOfPropertyPlantAndEquipmentTable" xlink:title="Definition : us-gaap_PropertyPlantAndEquipmentLineItems to us-gaap_ScheduleOfPropertyPlantAndEquipmentTable" xlink:type="arc" order="3" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentByTypeAxis" xlink:label="us-gaap_PropertyPlantAndEquipmentByTypeAxis" xlink:title="us-gaap_PropertyPlantAndEquipmentByTypeAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ScheduleOfPropertyPlantAndEquipmentTable" xlink:to="us-gaap_PropertyPlantAndEquipmentByTypeAxis" xlink:title="Definition : us-gaap_ScheduleOfPropertyPlantAndEquipmentTable to us-gaap_PropertyPlantAndEquipmentByTypeAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain" xlink:label="us-gaap_PropertyPlantAndEquipmentTypeDomain" xlink:title="us-gaap_PropertyPlantAndEquipmentTypeDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_PropertyPlantAndEquipmentByTypeAxis" xlink:to="us-gaap_PropertyPlantAndEquipmentTypeDomain" xlink:title="Definition : us-gaap_PropertyPlantAndEquipmentByTypeAxis to us-gaap_PropertyPlantAndEquipmentTypeDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConstructionInProgressMember" xlink:label="us-gaap_ConstructionInProgressMember" xlink:title="us-gaap_ConstructionInProgressMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_PropertyPlantAndEquipmentTypeDomain" xlink:to="us-gaap_ConstructionInProgressMember" xlink:title="Definition : us-gaap_PropertyPlantAndEquipmentTypeDomain to us-gaap_ConstructionInProgressMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ToolsDiesAndMoldsMember" xlink:label="us-gaap_ToolsDiesAndMoldsMember" xlink:title="us-gaap_ToolsDiesAndMoldsMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_PropertyPlantAndEquipmentTypeDomain" xlink:to="us-gaap_ToolsDiesAndMoldsMember" xlink:title="Definition : us-gaap_PropertyPlantAndEquipmentTypeDomain to us-gaap_ToolsDiesAndMoldsMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherMachineryAndEquipmentMember" xlink:label="us-gaap_OtherMachineryAndEquipmentMember" xlink:title="us-gaap_OtherMachineryAndEquipmentMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_PropertyPlantAndEquipmentTypeDomain" xlink:to="us-gaap_OtherMachineryAndEquipmentMember" xlink:title="Definition : us-gaap_PropertyPlantAndEquipmentTypeDomain to us-gaap_OtherMachineryAndEquipmentMember" xlink:type="arc" use="optional" order="2" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MachineryAndEquipmentMember" xlink:label="us-gaap_MachineryAndEquipmentMember" xlink:title="us-gaap_MachineryAndEquipmentMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_PropertyPlantAndEquipmentTypeDomain" xlink:to="us-gaap_MachineryAndEquipmentMember" xlink:title="Definition : us-gaap_PropertyPlantAndEquipmentTypeDomain to us-gaap_MachineryAndEquipmentMember" xlink:type="arc" use="optional" order="3" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LeaseholdsAndLeaseholdImprovementsMember" xlink:label="us-gaap_LeaseholdsAndLeaseholdImprovementsMember" xlink:title="us-gaap_LeaseholdsAndLeaseholdImprovementsMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_PropertyPlantAndEquipmentTypeDomain" xlink:to="us-gaap_LeaseholdsAndLeaseholdImprovementsMember" xlink:title="Definition : us-gaap_PropertyPlantAndEquipmentTypeDomain to us-gaap_LeaseholdsAndLeaseholdImprovementsMember" xlink:type="arc" use="optional" order="4" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ComputerEquipmentMember" xlink:label="us-gaap_ComputerEquipmentMember" xlink:title="us-gaap_ComputerEquipmentMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_PropertyPlantAndEquipmentTypeDomain" xlink:to="us-gaap_ComputerEquipmentMember" xlink:title="Definition : us-gaap_PropertyPlantAndEquipmentTypeDomain to us-gaap_ComputerEquipmentMember" xlink:type="arc" use="optional" order="5" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain" xlink:label="us-gaap_PropertyPlantAndEquipmentTypeDomain_1" xlink:title="us-gaap_PropertyPlantAndEquipmentTypeDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_PropertyPlantAndEquipmentByTypeAxis" xlink:to="us-gaap_PropertyPlantAndEquipmentTypeDomain_1" xlink:title="Definition : us-gaap_PropertyPlantAndEquipmentByTypeAxis to us-gaap_PropertyPlantAndEquipmentTypeDomain" xlink:type="arc" order="1" xbrldt:closed="false" />
  </link:definitionLink>
  <link:definitionLink xlink:type="extended" xlink:role="http://eveairmobility.com/role/OtherBalanceSheetComponentsDetails1">
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_ScheduleOfOtherLiabilitiesLineitems" xlink:label="evex_ScheduleOfOtherLiabilitiesLineitems" xlink:title="evex_ScheduleOfOtherLiabilitiesLineitems" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherLiabilitiesCurrentAbstract" xlink:label="us-gaap_OtherLiabilitiesCurrentAbstract" xlink:title="us-gaap_OtherLiabilitiesCurrentAbstract" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="evex_ScheduleOfOtherLiabilitiesLineitems" xlink:to="us-gaap_OtherLiabilitiesCurrentAbstract" xlink:title="Definition : evex_ScheduleOfOtherLiabilitiesLineitems to us-gaap_OtherLiabilitiesCurrentAbstract" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_AccruedServicesCurrent" xlink:label="evex_AccruedServicesCurrent" xlink:title="evex_AccruedServicesCurrent" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_OtherLiabilitiesCurrentAbstract" xlink:to="evex_AccruedServicesCurrent" xlink:title="Definition : us-gaap_OtherLiabilitiesCurrentAbstract to evex_AccruedServicesCurrent" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccruedSalariesCurrent" xlink:label="us-gaap_AccruedSalariesCurrent" xlink:title="us-gaap_AccruedSalariesCurrent" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_OtherLiabilitiesCurrentAbstract" xlink:to="us-gaap_AccruedSalariesCurrent" xlink:title="Definition : us-gaap_OtherLiabilitiesCurrentAbstract to us-gaap_AccruedSalariesCurrent" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_SubsidiesAndGrantsPayableCurrent" xlink:label="evex_SubsidiesAndGrantsPayableCurrent" xlink:title="evex_SubsidiesAndGrantsPayableCurrent" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_OtherLiabilitiesCurrentAbstract" xlink:to="evex_SubsidiesAndGrantsPayableCurrent" xlink:title="Definition : us-gaap_OtherLiabilitiesCurrentAbstract to evex_SubsidiesAndGrantsPayableCurrent" xlink:type="arc" order="2" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CustomerAdvancesCurrent" xlink:label="us-gaap_CustomerAdvancesCurrent" xlink:title="us-gaap_CustomerAdvancesCurrent" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_OtherLiabilitiesCurrentAbstract" xlink:to="us-gaap_CustomerAdvancesCurrent" xlink:title="Definition : us-gaap_OtherLiabilitiesCurrentAbstract to us-gaap_CustomerAdvancesCurrent" xlink:type="arc" use="optional" order="3" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestPayableCurrent" xlink:label="us-gaap_InterestPayableCurrent" xlink:title="us-gaap_InterestPayableCurrent" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_OtherLiabilitiesCurrentAbstract" xlink:to="us-gaap_InterestPayableCurrent" xlink:title="Definition : us-gaap_OtherLiabilitiesCurrentAbstract to us-gaap_InterestPayableCurrent" xlink:type="arc" use="optional" order="4" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccruedIncomeTaxesCurrent" xlink:label="us-gaap_AccruedIncomeTaxesCurrent" xlink:title="us-gaap_AccruedIncomeTaxesCurrent" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_OtherLiabilitiesCurrentAbstract" xlink:to="us-gaap_AccruedIncomeTaxesCurrent" xlink:title="Definition : us-gaap_OtherLiabilitiesCurrentAbstract to us-gaap_AccruedIncomeTaxesCurrent" xlink:type="arc" use="optional" order="5" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherSundryLiabilitiesCurrent" xlink:label="us-gaap_OtherSundryLiabilitiesCurrent" xlink:title="us-gaap_OtherSundryLiabilitiesCurrent" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_OtherLiabilitiesCurrentAbstract" xlink:to="us-gaap_OtherSundryLiabilitiesCurrent" xlink:title="Definition : us-gaap_OtherLiabilitiesCurrentAbstract to us-gaap_OtherSundryLiabilitiesCurrent" xlink:type="arc" use="optional" order="6" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherLiabilitiesCurrent" xlink:label="us-gaap_OtherLiabilitiesCurrent" xlink:title="us-gaap_OtherLiabilitiesCurrent" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_OtherLiabilitiesCurrentAbstract" xlink:to="us-gaap_OtherLiabilitiesCurrent" xlink:title="Definition : us-gaap_OtherLiabilitiesCurrentAbstract to us-gaap_OtherLiabilitiesCurrent" xlink:type="arc" use="optional" order="7" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherLiabilitiesNoncurrentAbstract" xlink:label="us-gaap_OtherLiabilitiesNoncurrentAbstract" xlink:title="us-gaap_OtherLiabilitiesNoncurrentAbstract" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="evex_ScheduleOfOtherLiabilitiesLineitems" xlink:to="us-gaap_OtherLiabilitiesNoncurrentAbstract" xlink:title="Definition : evex_ScheduleOfOtherLiabilitiesLineitems to us-gaap_OtherLiabilitiesNoncurrentAbstract" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_ProvisionForProfitSharingProgram" xlink:label="evex_ProvisionForProfitSharingProgram" xlink:title="evex_ProvisionForProfitSharingProgram" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_OtherLiabilitiesNoncurrentAbstract" xlink:to="evex_ProvisionForProfitSharingProgram" xlink:title="Definition : us-gaap_OtherLiabilitiesNoncurrentAbstract to evex_ProvisionForProfitSharingProgram" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_AdvancesFromCustomersNonCurrent" xlink:label="evex_AdvancesFromCustomersNonCurrent" xlink:title="evex_AdvancesFromCustomersNonCurrent" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_OtherLiabilitiesNoncurrentAbstract" xlink:to="evex_AdvancesFromCustomersNonCurrent" xlink:title="Definition : us-gaap_OtherLiabilitiesNoncurrentAbstract to evex_AdvancesFromCustomersNonCurrent" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_AccruedSalariesNonCurrent" xlink:label="evex_AccruedSalariesNonCurrent" xlink:title="evex_AccruedSalariesNonCurrent" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_OtherLiabilitiesNoncurrentAbstract" xlink:to="evex_AccruedSalariesNonCurrent" xlink:title="Definition : us-gaap_OtherLiabilitiesNoncurrentAbstract to evex_AccruedSalariesNonCurrent" xlink:type="arc" use="optional" order="2" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_SocialChargesPayableCurrent" xlink:label="evex_SocialChargesPayableCurrent" xlink:title="evex_SocialChargesPayableCurrent" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_OtherLiabilitiesNoncurrentAbstract" xlink:to="evex_SocialChargesPayableCurrent" xlink:title="Definition : us-gaap_OtherLiabilitiesNoncurrentAbstract to evex_SocialChargesPayableCurrent" xlink:type="arc" use="optional" order="3" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_AdvancedPaymentsRelatedToServiceArrangements" xlink:label="evex_AdvancedPaymentsRelatedToServiceArrangements" xlink:title="evex_AdvancedPaymentsRelatedToServiceArrangements" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_OtherLiabilitiesNoncurrentAbstract" xlink:to="evex_AdvancedPaymentsRelatedToServiceArrangements" xlink:title="Definition : us-gaap_OtherLiabilitiesNoncurrentAbstract to evex_AdvancedPaymentsRelatedToServiceArrangements" xlink:type="arc" use="optional" order="4" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherSundryLiabilitiesNoncurrent" xlink:label="us-gaap_OtherSundryLiabilitiesNoncurrent" xlink:title="us-gaap_OtherSundryLiabilitiesNoncurrent" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_OtherLiabilitiesNoncurrentAbstract" xlink:to="us-gaap_OtherSundryLiabilitiesNoncurrent" xlink:title="Definition : us-gaap_OtherLiabilitiesNoncurrentAbstract to us-gaap_OtherSundryLiabilitiesNoncurrent" xlink:type="arc" use="optional" order="5" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_LongTermIncentivePlan" xlink:label="evex_LongTermIncentivePlan" xlink:title="evex_LongTermIncentivePlan" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_OtherLiabilitiesNoncurrentAbstract" xlink:to="evex_LongTermIncentivePlan" xlink:title="Definition : us-gaap_OtherLiabilitiesNoncurrentAbstract to evex_LongTermIncentivePlan" xlink:type="arc" use="optional" order="6" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_ScheduleOfOtherLiabilitiesTable" xlink:label="evex_ScheduleOfOtherLiabilitiesTable" xlink:title="evex_ScheduleOfOtherLiabilitiesTable" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="evex_ScheduleOfOtherLiabilitiesLineitems" xlink:to="evex_ScheduleOfOtherLiabilitiesTable" xlink:title="Definition : evex_ScheduleOfOtherLiabilitiesLineitems to evex_ScheduleOfOtherLiabilitiesTable" xlink:type="arc" order="2" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:label="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:title="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="evex_ScheduleOfOtherLiabilitiesTable" xlink:to="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:title="Definition : evex_ScheduleOfOtherLiabilitiesTable to us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain" xlink:label="us-gaap_RelatedPartyDomain" xlink:title="us-gaap_RelatedPartyDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:to="us-gaap_RelatedPartyDomain" xlink:title="Definition : us-gaap_RelatedPartyTransactionsByRelatedPartyAxis to us-gaap_RelatedPartyDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NonrelatedPartyMember" xlink:label="us-gaap_NonrelatedPartyMember" xlink:title="us-gaap_NonrelatedPartyMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyDomain" xlink:to="us-gaap_NonrelatedPartyMember" xlink:title="Definition : us-gaap_RelatedPartyDomain to us-gaap_NonrelatedPartyMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain" xlink:label="us-gaap_RelatedPartyDomain_1" xlink:title="us-gaap_RelatedPartyDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:to="us-gaap_RelatedPartyDomain_1" xlink:title="Definition : us-gaap_RelatedPartyTransactionsByRelatedPartyAxis to us-gaap_RelatedPartyDomain" xlink:type="arc" order="1" xbrldt:closed="false" />
  </link:definitionLink>
  <link:definitionLink xlink:type="extended" xlink:role="http://eveairmobility.com/role/LeasesDetails">
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LesseeLeaseDescriptionLineItems" xlink:label="us-gaap_LesseeLeaseDescriptionLineItems" xlink:title="us-gaap_LesseeLeaseDescriptionLineItems" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AssetsAndLiabilitiesLesseeAbstract" xlink:label="us-gaap_AssetsAndLiabilitiesLesseeAbstract" xlink:title="us-gaap_AssetsAndLiabilitiesLesseeAbstract" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_LesseeLeaseDescriptionLineItems" xlink:to="us-gaap_AssetsAndLiabilitiesLesseeAbstract" xlink:title="Definition : us-gaap_LesseeLeaseDescriptionLineItems to us-gaap_AssetsAndLiabilitiesLesseeAbstract" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingLeaseRightOfUseAsset" xlink:label="us-gaap_OperatingLeaseRightOfUseAsset" xlink:title="us-gaap_OperatingLeaseRightOfUseAsset" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_AssetsAndLiabilitiesLesseeAbstract" xlink:to="us-gaap_OperatingLeaseRightOfUseAsset" xlink:title="Definition : us-gaap_AssetsAndLiabilitiesLesseeAbstract to us-gaap_OperatingLeaseRightOfUseAsset" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingLeaseLiability" xlink:label="us-gaap_OperatingLeaseLiability" xlink:title="us-gaap_OperatingLeaseLiability" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_AssetsAndLiabilitiesLesseeAbstract" xlink:to="us-gaap_OperatingLeaseLiability" xlink:title="Definition : us-gaap_AssetsAndLiabilitiesLesseeAbstract to us-gaap_OperatingLeaseLiability" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingLeaseLiabilityStatementOfFinancialPositionExtensibleList" xlink:label="us-gaap_OperatingLeaseLiabilityStatementOfFinancialPositionExtensibleList" xlink:title="us-gaap_OperatingLeaseLiabilityStatementOfFinancialPositionExtensibleList" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_AssetsAndLiabilitiesLesseeAbstract" xlink:to="us-gaap_OperatingLeaseLiabilityStatementOfFinancialPositionExtensibleList" xlink:title="Definition : us-gaap_AssetsAndLiabilitiesLesseeAbstract to us-gaap_OperatingLeaseLiabilityStatementOfFinancialPositionExtensibleList" xlink:type="arc" use="optional" order="2" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LesseeLeaseDescriptionTable" xlink:label="us-gaap_LesseeLeaseDescriptionTable" xlink:title="us-gaap_LesseeLeaseDescriptionTable" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="us-gaap_LesseeLeaseDescriptionLineItems" xlink:to="us-gaap_LesseeLeaseDescriptionTable" xlink:title="Definition : us-gaap_LesseeLeaseDescriptionLineItems to us-gaap_LesseeLeaseDescriptionTable" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:label="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:title="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_LesseeLeaseDescriptionTable" xlink:to="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:title="Definition : us-gaap_LesseeLeaseDescriptionTable to us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain" xlink:label="us-gaap_RelatedPartyDomain" xlink:title="us-gaap_RelatedPartyDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:to="us-gaap_RelatedPartyDomain" xlink:title="Definition : us-gaap_RelatedPartyTransactionsByRelatedPartyAxis to us-gaap_RelatedPartyDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyMember" xlink:label="us-gaap_RelatedPartyMember" xlink:title="us-gaap_RelatedPartyMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyDomain" xlink:to="us-gaap_RelatedPartyMember" xlink:title="Definition : us-gaap_RelatedPartyDomain to us-gaap_RelatedPartyMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NonrelatedPartyMember" xlink:label="us-gaap_NonrelatedPartyMember" xlink:title="us-gaap_NonrelatedPartyMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyDomain" xlink:to="us-gaap_NonrelatedPartyMember" xlink:title="Definition : us-gaap_RelatedPartyDomain to us-gaap_NonrelatedPartyMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain" xlink:label="us-gaap_RelatedPartyDomain_1" xlink:title="us-gaap_RelatedPartyDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:to="us-gaap_RelatedPartyDomain_1" xlink:title="Definition : us-gaap_RelatedPartyTransactionsByRelatedPartyAxis to us-gaap_RelatedPartyDomain" xlink:type="arc" order="1" xbrldt:closed="false" />
  </link:definitionLink>
  <link:definitionLink xlink:type="extended" xlink:role="http://eveairmobility.com/role/LeasesDetails3Textuals">
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LesseeLeaseDescriptionLineItems" xlink:label="us-gaap_LesseeLeaseDescriptionLineItems" xlink:title="us-gaap_LesseeLeaseDescriptionLineItems" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_LesseeOperatingLeaseLeaseNotYetCommencedNumberOfLeases" xlink:label="evex_LesseeOperatingLeaseLeaseNotYetCommencedNumberOfLeases" xlink:title="evex_LesseeOperatingLeaseLeaseNotYetCommencedNumberOfLeases" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_LesseeLeaseDescriptionLineItems" xlink:to="evex_LesseeOperatingLeaseLeaseNotYetCommencedNumberOfLeases" xlink:title="Definition : us-gaap_LesseeLeaseDescriptionLineItems to evex_LesseeOperatingLeaseLeaseNotYetCommencedNumberOfLeases" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_MinimumAmountOfCommitmentForInvestInLeaseholdImprovements" xlink:label="evex_MinimumAmountOfCommitmentForInvestInLeaseholdImprovements" xlink:title="evex_MinimumAmountOfCommitmentForInvestInLeaseholdImprovements" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_LesseeLeaseDescriptionLineItems" xlink:to="evex_MinimumAmountOfCommitmentForInvestInLeaseholdImprovements" xlink:title="Definition : us-gaap_LesseeLeaseDescriptionLineItems to evex_MinimumAmountOfCommitmentForInvestInLeaseholdImprovements" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_PrepaidLeaseCostsNoncurrent" xlink:label="evex_PrepaidLeaseCostsNoncurrent" xlink:title="evex_PrepaidLeaseCostsNoncurrent" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_LesseeLeaseDescriptionLineItems" xlink:to="evex_PrepaidLeaseCostsNoncurrent" xlink:title="Definition : us-gaap_LesseeLeaseDescriptionLineItems to evex_PrepaidLeaseCostsNoncurrent" xlink:type="arc" use="optional" order="2" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LesseeLeaseDescriptionTable" xlink:label="us-gaap_LesseeLeaseDescriptionTable" xlink:title="us-gaap_LesseeLeaseDescriptionTable" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="us-gaap_LesseeLeaseDescriptionLineItems" xlink:to="us-gaap_LesseeLeaseDescriptionTable" xlink:title="Definition : us-gaap_LesseeLeaseDescriptionLineItems to us-gaap_LesseeLeaseDescriptionTable" xlink:type="arc" order="3" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:label="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:title="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_LesseeLeaseDescriptionTable" xlink:to="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:title="Definition : us-gaap_LesseeLeaseDescriptionTable to us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain" xlink:label="us-gaap_RelatedPartyDomain" xlink:title="us-gaap_RelatedPartyDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:to="us-gaap_RelatedPartyDomain" xlink:title="Definition : us-gaap_RelatedPartyTransactionsByRelatedPartyAxis to us-gaap_RelatedPartyDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyMember" xlink:label="us-gaap_RelatedPartyMember" xlink:title="us-gaap_RelatedPartyMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyDomain" xlink:to="us-gaap_RelatedPartyMember" xlink:title="Definition : us-gaap_RelatedPartyDomain to us-gaap_RelatedPartyMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain" xlink:label="us-gaap_RelatedPartyDomain_1" xlink:title="us-gaap_RelatedPartyDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:to="us-gaap_RelatedPartyDomain_1" xlink:title="Definition : us-gaap_RelatedPartyTransactionsByRelatedPartyAxis to us-gaap_RelatedPartyDomain" xlink:type="arc" order="1" xbrldt:closed="false" />
  </link:definitionLink>
  <link:definitionLink xlink:type="extended" xlink:role="http://eveairmobility.com/role/SubsequentEventsDetailsTextuals">
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubsequentEventLineItems" xlink:label="us-gaap_SubsequentEventLineItems" xlink:title="us-gaap_SubsequentEventLineItems" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentFaceAmount" xlink:label="us-gaap_DebtInstrumentFaceAmount" xlink:title="us-gaap_DebtInstrumentFaceAmount" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_SubsequentEventLineItems" xlink:to="us-gaap_DebtInstrumentFaceAmount" xlink:title="Definition : us-gaap_SubsequentEventLineItems to us-gaap_DebtInstrumentFaceAmount" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProceedsFromLongTermLinesOfCredit" xlink:label="us-gaap_ProceedsFromLongTermLinesOfCredit" xlink:title="us-gaap_ProceedsFromLongTermLinesOfCredit" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_SubsequentEventLineItems" xlink:to="us-gaap_ProceedsFromLongTermLinesOfCredit" xlink:title="Definition : us-gaap_SubsequentEventLineItems to us-gaap_ProceedsFromLongTermLinesOfCredit" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentDescriptionOfVariableRateBasis" xlink:label="us-gaap_DebtInstrumentDescriptionOfVariableRateBasis" xlink:title="us-gaap_DebtInstrumentDescriptionOfVariableRateBasis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_SubsequentEventLineItems" xlink:to="us-gaap_DebtInstrumentDescriptionOfVariableRateBasis" xlink:title="Definition : us-gaap_SubsequentEventLineItems to us-gaap_DebtInstrumentDescriptionOfVariableRateBasis" xlink:type="arc" use="optional" order="2" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentBasisSpreadOnVariableRate1" xlink:label="us-gaap_DebtInstrumentBasisSpreadOnVariableRate1" xlink:title="us-gaap_DebtInstrumentBasisSpreadOnVariableRate1" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_SubsequentEventLineItems" xlink:to="us-gaap_DebtInstrumentBasisSpreadOnVariableRate1" xlink:title="Definition : us-gaap_SubsequentEventLineItems to us-gaap_DebtInstrumentBasisSpreadOnVariableRate1" xlink:type="arc" use="optional" order="3" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentPaymentTerms" xlink:label="us-gaap_DebtInstrumentPaymentTerms" xlink:title="us-gaap_DebtInstrumentPaymentTerms" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_SubsequentEventLineItems" xlink:to="us-gaap_DebtInstrumentPaymentTerms" xlink:title="Definition : us-gaap_SubsequentEventLineItems to us-gaap_DebtInstrumentPaymentTerms" xlink:type="arc" use="optional" order="4" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EarlyRepaymentOfSeniorDebt" xlink:label="us-gaap_EarlyRepaymentOfSeniorDebt" xlink:title="us-gaap_EarlyRepaymentOfSeniorDebt" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_SubsequentEventLineItems" xlink:to="us-gaap_EarlyRepaymentOfSeniorDebt" xlink:title="Definition : us-gaap_SubsequentEventLineItems to us-gaap_EarlyRepaymentOfSeniorDebt" xlink:type="arc" use="optional" order="5" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubsequentEventTable" xlink:label="us-gaap_SubsequentEventTable" xlink:title="us-gaap_SubsequentEventTable" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="us-gaap_SubsequentEventLineItems" xlink:to="us-gaap_SubsequentEventTable" xlink:title="Definition : us-gaap_SubsequentEventLineItems to us-gaap_SubsequentEventTable" xlink:type="arc" order="6" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubsequentEventTypeAxis" xlink:label="us-gaap_SubsequentEventTypeAxis" xlink:title="us-gaap_SubsequentEventTypeAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_SubsequentEventTable" xlink:to="us-gaap_SubsequentEventTypeAxis" xlink:title="Definition : us-gaap_SubsequentEventTable to us-gaap_SubsequentEventTypeAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubsequentEventTypeDomain" xlink:label="us-gaap_SubsequentEventTypeDomain" xlink:title="us-gaap_SubsequentEventTypeDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_SubsequentEventTypeAxis" xlink:to="us-gaap_SubsequentEventTypeDomain" xlink:title="Definition : us-gaap_SubsequentEventTypeAxis to us-gaap_SubsequentEventTypeDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubsequentEventMember" xlink:label="us-gaap_SubsequentEventMember" xlink:title="us-gaap_SubsequentEventMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_SubsequentEventTypeDomain" xlink:to="us-gaap_SubsequentEventMember" xlink:title="Definition : us-gaap_SubsequentEventTypeDomain to us-gaap_SubsequentEventMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubsequentEventTypeDomain" xlink:label="us-gaap_SubsequentEventTypeDomain_1" xlink:title="us-gaap_SubsequentEventTypeDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_SubsequentEventTypeAxis" xlink:to="us-gaap_SubsequentEventTypeDomain_1" xlink:title="Definition : us-gaap_SubsequentEventTypeAxis to us-gaap_SubsequentEventTypeDomain" xlink:type="arc" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_AgreementAxis" xlink:label="evex_AgreementAxis" xlink:title="evex_AgreementAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_SubsequentEventTable" xlink:to="evex_AgreementAxis" xlink:title="Definition : us-gaap_SubsequentEventTable to evex_AgreementAxis" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_AgreementDomain" xlink:label="evex_AgreementDomain" xlink:title="evex_AgreementDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="evex_AgreementAxis" xlink:to="evex_AgreementDomain" xlink:title="Definition : evex_AgreementAxis to evex_AgreementDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_SyndicatedCreditAgreementMember" xlink:label="evex_SyndicatedCreditAgreementMember" xlink:title="evex_SyndicatedCreditAgreementMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="evex_AgreementDomain" xlink:to="evex_SyndicatedCreditAgreementMember" xlink:title="Definition : evex_AgreementDomain to evex_SyndicatedCreditAgreementMember" xlink:type="arc" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_CreditAgreementMember" xlink:label="evex_CreditAgreementMember" xlink:title="evex_CreditAgreementMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="evex_AgreementDomain" xlink:to="evex_CreditAgreementMember" xlink:title="Definition : evex_AgreementDomain to evex_CreditAgreementMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_AgreementDomain" xlink:label="evex_AgreementDomain_1" xlink:title="evex_AgreementDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="evex_AgreementAxis" xlink:to="evex_AgreementDomain_1" xlink:title="Definition : evex_AgreementAxis to evex_AgreementDomain" xlink:type="arc" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditFacilityAxis" xlink:label="us-gaap_LineOfCreditFacilityAxis" xlink:title="us-gaap_LineOfCreditFacilityAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_SubsequentEventTable" xlink:to="us-gaap_LineOfCreditFacilityAxis" xlink:title="Definition : us-gaap_SubsequentEventTable to us-gaap_LineOfCreditFacilityAxis" xlink:type="arc" use="optional" order="2" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditFacilityLenderDomain" xlink:label="us-gaap_LineOfCreditFacilityLenderDomain" xlink:title="us-gaap_LineOfCreditFacilityLenderDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_LineOfCreditFacilityAxis" xlink:to="us-gaap_LineOfCreditFacilityLenderDomain" xlink:title="Definition : us-gaap_LineOfCreditFacilityAxis to us-gaap_LineOfCreditFacilityLenderDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_CitibankNAMember" xlink:label="evex_CitibankNAMember" xlink:title="evex_CitibankNAMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_LineOfCreditFacilityLenderDomain" xlink:to="evex_CitibankNAMember" xlink:title="Definition : us-gaap_LineOfCreditFacilityLenderDomain to evex_CitibankNAMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditFacilityLenderDomain" xlink:label="us-gaap_LineOfCreditFacilityLenderDomain_1" xlink:title="us-gaap_LineOfCreditFacilityLenderDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_LineOfCreditFacilityAxis" xlink:to="us-gaap_LineOfCreditFacilityLenderDomain_1" xlink:title="Definition : us-gaap_LineOfCreditFacilityAxis to us-gaap_LineOfCreditFacilityLenderDomain" xlink:type="arc" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidatedEntitiesAxis" xlink:label="srt_ConsolidatedEntitiesAxis" xlink:title="srt_ConsolidatedEntitiesAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_SubsequentEventTable" xlink:to="srt_ConsolidatedEntitiesAxis" xlink:title="Definition : us-gaap_SubsequentEventTable to srt_ConsolidatedEntitiesAxis" xlink:type="arc" use="optional" order="3" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidatedEntitiesDomain" xlink:label="srt_ConsolidatedEntitiesDomain" xlink:title="srt_ConsolidatedEntitiesDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="srt_ConsolidatedEntitiesAxis" xlink:to="srt_ConsolidatedEntitiesDomain" xlink:title="Definition : srt_ConsolidatedEntitiesAxis to srt_ConsolidatedEntitiesDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_EVEUAMLlcMember" xlink:label="evex_EVEUAMLlcMember" xlink:title="evex_EVEUAMLlcMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_ConsolidatedEntitiesDomain" xlink:to="evex_EVEUAMLlcMember" xlink:title="Definition : srt_ConsolidatedEntitiesDomain to evex_EVEUAMLlcMember" xlink:type="arc" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidatedEntitiesDomain" xlink:label="srt_ConsolidatedEntitiesDomain_1" xlink:title="srt_ConsolidatedEntitiesDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="srt_ConsolidatedEntitiesAxis" xlink:to="srt_ConsolidatedEntitiesDomain_1" xlink:title="Definition : srt_ConsolidatedEntitiesAxis to srt_ConsolidatedEntitiesDomain" xlink:type="arc" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityAxis" xlink:label="us-gaap_CreditFacilityAxis" xlink:title="us-gaap_CreditFacilityAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_SubsequentEventTable" xlink:to="us-gaap_CreditFacilityAxis" xlink:title="Definition : us-gaap_SubsequentEventTable to us-gaap_CreditFacilityAxis" xlink:type="arc" use="optional" order="4" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityDomain" xlink:label="us-gaap_CreditFacilityDomain" xlink:title="us-gaap_CreditFacilityDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_CreditFacilityAxis" xlink:to="us-gaap_CreditFacilityDomain" xlink:title="Definition : us-gaap_CreditFacilityAxis to us-gaap_CreditFacilityDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LoansPayableMember" xlink:label="us-gaap_LoansPayableMember" xlink:title="us-gaap_LoansPayableMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_CreditFacilityDomain" xlink:to="us-gaap_LoansPayableMember" xlink:title="Definition : us-gaap_CreditFacilityDomain to us-gaap_LoansPayableMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityDomain" xlink:label="us-gaap_CreditFacilityDomain_1" xlink:title="us-gaap_CreditFacilityDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_CreditFacilityAxis" xlink:to="us-gaap_CreditFacilityDomain_1" xlink:title="Definition : us-gaap_CreditFacilityAxis to us-gaap_CreditFacilityDomain" xlink:type="arc" order="1" xbrldt:closed="false" />
  </link:definitionLink>
  <link:definitionLink xlink:type="extended" xlink:role="http://eveairmobility.com/role/DebtDetails2Textuals">
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentLineItems" xlink:label="us-gaap_DebtInstrumentLineItems" xlink:title="us-gaap_DebtInstrumentLineItems" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongTermDebtPercentageBearingFixedInterestRate" xlink:label="us-gaap_LongTermDebtPercentageBearingFixedInterestRate" xlink:title="us-gaap_LongTermDebtPercentageBearingFixedInterestRate" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DebtInstrumentLineItems" xlink:to="us-gaap_LongTermDebtPercentageBearingFixedInterestRate" xlink:title="Definition : us-gaap_DebtInstrumentLineItems to us-gaap_LongTermDebtPercentageBearingFixedInterestRate" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentCovenantDescription" xlink:label="us-gaap_DebtInstrumentCovenantDescription" xlink:title="us-gaap_DebtInstrumentCovenantDescription" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DebtInstrumentLineItems" xlink:to="us-gaap_DebtInstrumentCovenantDescription" xlink:title="Definition : us-gaap_DebtInstrumentLineItems to us-gaap_DebtInstrumentCovenantDescription" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentFaceAmount" xlink:label="us-gaap_DebtInstrumentFaceAmount" xlink:title="us-gaap_DebtInstrumentFaceAmount" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DebtInstrumentLineItems" xlink:to="us-gaap_DebtInstrumentFaceAmount" xlink:title="Definition : us-gaap_DebtInstrumentLineItems to us-gaap_DebtInstrumentFaceAmount" xlink:type="arc" use="optional" order="2" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProceedsFromLongTermLinesOfCredit" xlink:label="us-gaap_ProceedsFromLongTermLinesOfCredit" xlink:title="us-gaap_ProceedsFromLongTermLinesOfCredit" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DebtInstrumentLineItems" xlink:to="us-gaap_ProceedsFromLongTermLinesOfCredit" xlink:title="Definition : us-gaap_DebtInstrumentLineItems to us-gaap_ProceedsFromLongTermLinesOfCredit" xlink:type="arc" use="optional" order="3" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditFacilityFrequencyOfCommitmentFeePayment" xlink:label="us-gaap_LineOfCreditFacilityFrequencyOfCommitmentFeePayment" xlink:title="us-gaap_LineOfCreditFacilityFrequencyOfCommitmentFeePayment" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DebtInstrumentLineItems" xlink:to="us-gaap_LineOfCreditFacilityFrequencyOfCommitmentFeePayment" xlink:title="Definition : us-gaap_DebtInstrumentLineItems to us-gaap_LineOfCreditFacilityFrequencyOfCommitmentFeePayment" xlink:type="arc" use="optional" order="4" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentDescriptionOfVariableRateBasis" xlink:label="us-gaap_DebtInstrumentDescriptionOfVariableRateBasis" xlink:title="us-gaap_DebtInstrumentDescriptionOfVariableRateBasis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DebtInstrumentLineItems" xlink:to="us-gaap_DebtInstrumentDescriptionOfVariableRateBasis" xlink:title="Definition : us-gaap_DebtInstrumentLineItems to us-gaap_DebtInstrumentDescriptionOfVariableRateBasis" xlink:type="arc" use="optional" order="5" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtWeightedAverageInterestRate" xlink:label="us-gaap_LongtermDebtWeightedAverageInterestRate" xlink:title="us-gaap_LongtermDebtWeightedAverageInterestRate" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DebtInstrumentLineItems" xlink:to="us-gaap_LongtermDebtWeightedAverageInterestRate" xlink:title="Definition : us-gaap_DebtInstrumentLineItems to us-gaap_LongtermDebtWeightedAverageInterestRate" xlink:type="arc" use="optional" order="6" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentMaturityDateDescription" xlink:label="us-gaap_DebtInstrumentMaturityDateDescription" xlink:title="us-gaap_DebtInstrumentMaturityDateDescription" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DebtInstrumentLineItems" xlink:to="us-gaap_DebtInstrumentMaturityDateDescription" xlink:title="Definition : us-gaap_DebtInstrumentLineItems to us-gaap_DebtInstrumentMaturityDateDescription" xlink:type="arc" use="optional" order="7" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EarlyRepaymentOfSeniorDebt" xlink:label="us-gaap_EarlyRepaymentOfSeniorDebt" xlink:title="us-gaap_EarlyRepaymentOfSeniorDebt" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DebtInstrumentLineItems" xlink:to="us-gaap_EarlyRepaymentOfSeniorDebt" xlink:title="Definition : us-gaap_DebtInstrumentLineItems to us-gaap_EarlyRepaymentOfSeniorDebt" xlink:type="arc" use="optional" order="8" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCredit" xlink:label="us-gaap_LineOfCredit" xlink:title="us-gaap_LineOfCredit" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DebtInstrumentLineItems" xlink:to="us-gaap_LineOfCredit" xlink:title="Definition : us-gaap_DebtInstrumentLineItems to us-gaap_LineOfCredit" xlink:type="arc" use="optional" order="9" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditFacilityInterestRateAtPeriodEnd" xlink:label="us-gaap_LineOfCreditFacilityInterestRateAtPeriodEnd" xlink:title="us-gaap_LineOfCreditFacilityInterestRateAtPeriodEnd" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DebtInstrumentLineItems" xlink:to="us-gaap_LineOfCreditFacilityInterestRateAtPeriodEnd" xlink:title="Definition : us-gaap_DebtInstrumentLineItems to us-gaap_LineOfCreditFacilityInterestRateAtPeriodEnd" xlink:type="arc" use="optional" order="10" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentBasisSpreadOnVariableRate1" xlink:label="us-gaap_DebtInstrumentBasisSpreadOnVariableRate1" xlink:title="us-gaap_DebtInstrumentBasisSpreadOnVariableRate1" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DebtInstrumentLineItems" xlink:to="us-gaap_DebtInstrumentBasisSpreadOnVariableRate1" xlink:title="Definition : us-gaap_DebtInstrumentLineItems to us-gaap_DebtInstrumentBasisSpreadOnVariableRate1" xlink:type="arc" use="optional" order="11" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_NumberOfDebtInstruments" xlink:label="evex_NumberOfDebtInstruments" xlink:title="evex_NumberOfDebtInstruments" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DebtInstrumentLineItems" xlink:to="evex_NumberOfDebtInstruments" xlink:title="Definition : us-gaap_DebtInstrumentLineItems to evex_NumberOfDebtInstruments" xlink:type="arc" use="optional" order="12" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity" xlink:label="us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity" xlink:title="us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DebtInstrumentLineItems" xlink:to="us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity" xlink:title="Definition : us-gaap_DebtInstrumentLineItems to us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity" xlink:type="arc" use="optional" order="13" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditFacilityInterestRateDuringPeriod" xlink:label="us-gaap_LineOfCreditFacilityInterestRateDuringPeriod" xlink:title="us-gaap_LineOfCreditFacilityInterestRateDuringPeriod" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DebtInstrumentLineItems" xlink:to="us-gaap_LineOfCreditFacilityInterestRateDuringPeriod" xlink:title="Definition : us-gaap_DebtInstrumentLineItems to us-gaap_LineOfCreditFacilityInterestRateDuringPeriod" xlink:type="arc" use="optional" order="14" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditFacilityCommitmentFeeAmount" xlink:label="us-gaap_LineOfCreditFacilityCommitmentFeeAmount" xlink:title="us-gaap_LineOfCreditFacilityCommitmentFeeAmount" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DebtInstrumentLineItems" xlink:to="us-gaap_LineOfCreditFacilityCommitmentFeeAmount" xlink:title="Definition : us-gaap_DebtInstrumentLineItems to us-gaap_LineOfCreditFacilityCommitmentFeeAmount" xlink:type="arc" use="optional" order="15" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditFacilityCovenantTerms" xlink:label="us-gaap_LineOfCreditFacilityCovenantTerms" xlink:title="us-gaap_LineOfCreditFacilityCovenantTerms" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DebtInstrumentLineItems" xlink:to="us-gaap_LineOfCreditFacilityCovenantTerms" xlink:title="Definition : us-gaap_DebtInstrumentLineItems to us-gaap_LineOfCreditFacilityCovenantTerms" xlink:type="arc" use="optional" order="16" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity" xlink:label="us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity" xlink:title="us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DebtInstrumentLineItems" xlink:to="us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity" xlink:title="Definition : us-gaap_DebtInstrumentLineItems to us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity" xlink:type="arc" use="optional" order="17" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentVariableInterestRateTypeExtensibleEnumeration" xlink:label="us-gaap_DebtInstrumentVariableInterestRateTypeExtensibleEnumeration" xlink:title="us-gaap_DebtInstrumentVariableInterestRateTypeExtensibleEnumeration" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DebtInstrumentLineItems" xlink:to="us-gaap_DebtInstrumentVariableInterestRateTypeExtensibleEnumeration" xlink:title="Definition : us-gaap_DebtInstrumentLineItems to us-gaap_DebtInstrumentVariableInterestRateTypeExtensibleEnumeration" xlink:type="arc" use="optional" order="18" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditFacilityBorrowingCapacityDescription" xlink:label="us-gaap_LineOfCreditFacilityBorrowingCapacityDescription" xlink:title="us-gaap_LineOfCreditFacilityBorrowingCapacityDescription" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DebtInstrumentLineItems" xlink:to="us-gaap_LineOfCreditFacilityBorrowingCapacityDescription" xlink:title="Definition : us-gaap_DebtInstrumentLineItems to us-gaap_LineOfCreditFacilityBorrowingCapacityDescription" xlink:type="arc" use="optional" order="19" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SaleOfStockConsiderationReceivedPerTransaction" xlink:label="us-gaap_SaleOfStockConsiderationReceivedPerTransaction" xlink:title="us-gaap_SaleOfStockConsiderationReceivedPerTransaction" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DebtInstrumentLineItems" xlink:to="us-gaap_SaleOfStockConsiderationReceivedPerTransaction" xlink:title="Definition : us-gaap_DebtInstrumentLineItems to us-gaap_SaleOfStockConsiderationReceivedPerTransaction" xlink:type="arc" use="optional" order="20" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentCollateral" xlink:label="us-gaap_DebtInstrumentCollateral" xlink:title="us-gaap_DebtInstrumentCollateral" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DebtInstrumentLineItems" xlink:to="us-gaap_DebtInstrumentCollateral" xlink:title="Definition : us-gaap_DebtInstrumentLineItems to us-gaap_DebtInstrumentCollateral" xlink:type="arc" use="optional" order="21" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentTable" xlink:label="us-gaap_DebtInstrumentTable" xlink:title="us-gaap_DebtInstrumentTable" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="us-gaap_DebtInstrumentLineItems" xlink:to="us-gaap_DebtInstrumentTable" xlink:title="Definition : us-gaap_DebtInstrumentLineItems to us-gaap_DebtInstrumentTable" xlink:type="arc" order="22" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:title="dei_LegalEntityAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_DebtInstrumentTable" xlink:to="dei_LegalEntityAxis" xlink:title="Definition : us-gaap_DebtInstrumentTable to dei_LegalEntityAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:title="dei_EntityDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:title="Definition : dei_LegalEntityAxis to dei_EntityDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_UnitedAirlinesVenturesLtdMember" xlink:label="evex_UnitedAirlinesVenturesLtdMember" xlink:title="evex_UnitedAirlinesVenturesLtdMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_EntityDomain" xlink:to="evex_UnitedAirlinesVenturesLtdMember" xlink:title="Definition : dei_EntityDomain to evex_UnitedAirlinesVenturesLtdMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_EveBrazilMember" xlink:label="evex_EveBrazilMember" xlink:title="evex_EveBrazilMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_EntityDomain" xlink:to="evex_EveBrazilMember" xlink:title="Definition : dei_EntityDomain to evex_EveBrazilMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain_1" xlink:title="dei_EntityDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain_1" xlink:title="Definition : dei_LegalEntityAxis to dei_EntityDomain" xlink:type="arc" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_AgreementAxis" xlink:label="evex_AgreementAxis" xlink:title="evex_AgreementAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_DebtInstrumentTable" xlink:to="evex_AgreementAxis" xlink:title="Definition : us-gaap_DebtInstrumentTable to evex_AgreementAxis" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_AgreementDomain" xlink:label="evex_AgreementDomain" xlink:title="evex_AgreementDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="evex_AgreementAxis" xlink:to="evex_AgreementDomain" xlink:title="Definition : evex_AgreementAxis to evex_AgreementDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_UnitedWarrantAgreementMember" xlink:label="evex_UnitedWarrantAgreementMember" xlink:title="evex_UnitedWarrantAgreementMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="evex_AgreementDomain" xlink:to="evex_UnitedWarrantAgreementMember" xlink:title="Definition : evex_AgreementDomain to evex_UnitedWarrantAgreementMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_LoanAgreementMember" xlink:label="evex_LoanAgreementMember" xlink:title="evex_LoanAgreementMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="evex_AgreementDomain" xlink:to="evex_LoanAgreementMember" xlink:title="Definition : evex_AgreementDomain to evex_LoanAgreementMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_FinancingAgreementMember" xlink:label="evex_FinancingAgreementMember" xlink:title="evex_FinancingAgreementMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="evex_AgreementDomain" xlink:to="evex_FinancingAgreementMember" xlink:title="Definition : evex_AgreementDomain to evex_FinancingAgreementMember" xlink:type="arc" use="optional" order="2" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_CreditAgreementMember" xlink:label="evex_CreditAgreementMember" xlink:title="evex_CreditAgreementMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="evex_AgreementDomain" xlink:to="evex_CreditAgreementMember" xlink:title="Definition : evex_AgreementDomain to evex_CreditAgreementMember" xlink:type="arc" use="optional" order="3" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_ElectricMotorsDevelopmentLoanAgreementMember" xlink:label="evex_ElectricMotorsDevelopmentLoanAgreementMember" xlink:title="evex_ElectricMotorsDevelopmentLoanAgreementMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="evex_AgreementDomain" xlink:to="evex_ElectricMotorsDevelopmentLoanAgreementMember" xlink:title="Definition : evex_AgreementDomain to evex_ElectricMotorsDevelopmentLoanAgreementMember" xlink:type="arc" order="4" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_SubscriptionAgreementMember" xlink:label="evex_SubscriptionAgreementMember" xlink:title="evex_SubscriptionAgreementMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="evex_AgreementDomain" xlink:to="evex_SubscriptionAgreementMember" xlink:title="Definition : evex_AgreementDomain to evex_SubscriptionAgreementMember" xlink:type="arc" order="5" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_SyndicatedCreditAgreementMember" xlink:label="evex_SyndicatedCreditAgreementMember" xlink:title="evex_SyndicatedCreditAgreementMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="evex_AgreementDomain" xlink:to="evex_SyndicatedCreditAgreementMember" xlink:title="Definition : evex_AgreementDomain to evex_SyndicatedCreditAgreementMember" xlink:type="arc" order="6" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_AgreementDomain" xlink:label="evex_AgreementDomain_1" xlink:title="evex_AgreementDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="evex_AgreementAxis" xlink:to="evex_AgreementDomain_1" xlink:title="Definition : evex_AgreementAxis to evex_AgreementDomain" xlink:type="arc" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementEquityComponentsAxis" xlink:label="us-gaap_StatementEquityComponentsAxis" xlink:title="us-gaap_StatementEquityComponentsAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_DebtInstrumentTable" xlink:to="us-gaap_StatementEquityComponentsAxis" xlink:title="Definition : us-gaap_DebtInstrumentTable to us-gaap_StatementEquityComponentsAxis" xlink:type="arc" use="optional" order="2" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquityComponentDomain" xlink:label="us-gaap_EquityComponentDomain" xlink:title="us-gaap_EquityComponentDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_StatementEquityComponentsAxis" xlink:to="us-gaap_EquityComponentDomain" xlink:title="Definition : us-gaap_StatementEquityComponentsAxis to us-gaap_EquityComponentDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockMember" xlink:label="us-gaap_CommonStockMember" xlink:title="us-gaap_CommonStockMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EquityComponentDomain" xlink:to="us-gaap_CommonStockMember" xlink:title="Definition : us-gaap_EquityComponentDomain to us-gaap_CommonStockMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquityComponentDomain" xlink:label="us-gaap_EquityComponentDomain_1" xlink:title="us-gaap_EquityComponentDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_StatementEquityComponentsAxis" xlink:to="us-gaap_EquityComponentDomain_1" xlink:title="Definition : us-gaap_StatementEquityComponentsAxis to us-gaap_EquityComponentDomain" xlink:type="arc" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfWarrantOrRightAxis" xlink:label="us-gaap_ClassOfWarrantOrRightAxis" xlink:title="us-gaap_ClassOfWarrantOrRightAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_DebtInstrumentTable" xlink:to="us-gaap_ClassOfWarrantOrRightAxis" xlink:title="Definition : us-gaap_DebtInstrumentTable to us-gaap_ClassOfWarrantOrRightAxis" xlink:type="arc" use="optional" order="3" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfWarrantOrRightDomain" xlink:label="us-gaap_ClassOfWarrantOrRightDomain" xlink:title="us-gaap_ClassOfWarrantOrRightDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_ClassOfWarrantOrRightAxis" xlink:to="us-gaap_ClassOfWarrantOrRightDomain" xlink:title="Definition : us-gaap_ClassOfWarrantOrRightAxis to us-gaap_ClassOfWarrantOrRightDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_WarrantMember" xlink:label="us-gaap_WarrantMember" xlink:title="us-gaap_WarrantMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ClassOfWarrantOrRightDomain" xlink:to="us-gaap_WarrantMember" xlink:title="Definition : us-gaap_ClassOfWarrantOrRightDomain to us-gaap_WarrantMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfWarrantOrRightDomain" xlink:label="us-gaap_ClassOfWarrantOrRightDomain_1" xlink:title="us-gaap_ClassOfWarrantOrRightDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_ClassOfWarrantOrRightAxis" xlink:to="us-gaap_ClassOfWarrantOrRightDomain_1" xlink:title="Definition : us-gaap_ClassOfWarrantOrRightAxis to us-gaap_ClassOfWarrantOrRightDomain" xlink:type="arc" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditFacilityAxis" xlink:label="us-gaap_LineOfCreditFacilityAxis" xlink:title="us-gaap_LineOfCreditFacilityAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_DebtInstrumentTable" xlink:to="us-gaap_LineOfCreditFacilityAxis" xlink:title="Definition : us-gaap_DebtInstrumentTable to us-gaap_LineOfCreditFacilityAxis" xlink:type="arc" use="optional" order="4" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditFacilityLenderDomain" xlink:label="us-gaap_LineOfCreditFacilityLenderDomain" xlink:title="us-gaap_LineOfCreditFacilityLenderDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_LineOfCreditFacilityAxis" xlink:to="us-gaap_LineOfCreditFacilityLenderDomain" xlink:title="Definition : us-gaap_LineOfCreditFacilityAxis to us-gaap_LineOfCreditFacilityLenderDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_BrazilsNationalDevelopmentBankMember" xlink:label="evex_BrazilsNationalDevelopmentBankMember" xlink:title="evex_BrazilsNationalDevelopmentBankMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_LineOfCreditFacilityLenderDomain" xlink:to="evex_BrazilsNationalDevelopmentBankMember" xlink:title="Definition : us-gaap_LineOfCreditFacilityLenderDomain to evex_BrazilsNationalDevelopmentBankMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_CitibankNAMember" xlink:label="evex_CitibankNAMember" xlink:title="evex_CitibankNAMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_LineOfCreditFacilityLenderDomain" xlink:to="evex_CitibankNAMember" xlink:title="Definition : us-gaap_LineOfCreditFacilityLenderDomain to evex_CitibankNAMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_FundoNacionalSobreMudancaClimaticaMember" xlink:label="evex_FundoNacionalSobreMudancaClimaticaMember" xlink:title="evex_FundoNacionalSobreMudancaClimaticaMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_LineOfCreditFacilityLenderDomain" xlink:to="evex_FundoNacionalSobreMudancaClimaticaMember" xlink:title="Definition : us-gaap_LineOfCreditFacilityLenderDomain to evex_FundoNacionalSobreMudancaClimaticaMember" xlink:type="arc" use="optional" order="2" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_PrivateExportFundingCorporationAndExportImportBankOfUnitedStatesMember" xlink:label="evex_PrivateExportFundingCorporationAndExportImportBankOfUnitedStatesMember" xlink:title="evex_PrivateExportFundingCorporationAndExportImportBankOfUnitedStatesMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_LineOfCreditFacilityLenderDomain" xlink:to="evex_PrivateExportFundingCorporationAndExportImportBankOfUnitedStatesMember" xlink:title="Definition : us-gaap_LineOfCreditFacilityLenderDomain to evex_PrivateExportFundingCorporationAndExportImportBankOfUnitedStatesMember" xlink:type="arc" order="3" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditFacilityLenderDomain" xlink:label="us-gaap_LineOfCreditFacilityLenderDomain_1" xlink:title="us-gaap_LineOfCreditFacilityLenderDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_LineOfCreditFacilityAxis" xlink:to="us-gaap_LineOfCreditFacilityLenderDomain_1" xlink:title="Definition : us-gaap_LineOfCreditFacilityAxis to us-gaap_LineOfCreditFacilityLenderDomain" xlink:type="arc" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityAxis" xlink:label="us-gaap_CreditFacilityAxis" xlink:title="us-gaap_CreditFacilityAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_DebtInstrumentTable" xlink:to="us-gaap_CreditFacilityAxis" xlink:title="Definition : us-gaap_DebtInstrumentTable to us-gaap_CreditFacilityAxis" xlink:type="arc" use="optional" order="5" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityDomain" xlink:label="us-gaap_CreditFacilityDomain" xlink:title="us-gaap_CreditFacilityDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_CreditFacilityAxis" xlink:to="us-gaap_CreditFacilityDomain" xlink:title="Definition : us-gaap_CreditFacilityAxis to us-gaap_CreditFacilityDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditMember" xlink:label="us-gaap_LineOfCreditMember" xlink:title="us-gaap_LineOfCreditMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_CreditFacilityDomain" xlink:to="us-gaap_LineOfCreditMember" xlink:title="Definition : us-gaap_CreditFacilityDomain to us-gaap_LineOfCreditMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_TwoLinesOfCreditMember" xlink:label="evex_TwoLinesOfCreditMember" xlink:title="evex_TwoLinesOfCreditMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_CreditFacilityDomain" xlink:to="evex_TwoLinesOfCreditMember" xlink:title="Definition : us-gaap_CreditFacilityDomain to evex_TwoLinesOfCreditMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_FirstLineOfCreditMember" xlink:label="evex_FirstLineOfCreditMember" xlink:title="evex_FirstLineOfCreditMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_CreditFacilityDomain" xlink:to="evex_FirstLineOfCreditMember" xlink:title="Definition : us-gaap_CreditFacilityDomain to evex_FirstLineOfCreditMember" xlink:type="arc" use="optional" order="2" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_SecondLineOfCreditMember" xlink:label="evex_SecondLineOfCreditMember" xlink:title="evex_SecondLineOfCreditMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_CreditFacilityDomain" xlink:to="evex_SecondLineOfCreditMember" xlink:title="Definition : us-gaap_CreditFacilityDomain to evex_SecondLineOfCreditMember" xlink:type="arc" use="optional" order="3" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_ThirdLineOfCreditMember" xlink:label="evex_ThirdLineOfCreditMember" xlink:title="evex_ThirdLineOfCreditMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_CreditFacilityDomain" xlink:to="evex_ThirdLineOfCreditMember" xlink:title="Definition : us-gaap_CreditFacilityDomain to evex_ThirdLineOfCreditMember" xlink:type="arc" use="optional" order="4" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_FourthLineOfCreditMember" xlink:label="evex_FourthLineOfCreditMember" xlink:title="evex_FourthLineOfCreditMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_CreditFacilityDomain" xlink:to="evex_FourthLineOfCreditMember" xlink:title="Definition : us-gaap_CreditFacilityDomain to evex_FourthLineOfCreditMember" xlink:type="arc" use="optional" order="5" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LoansPayableMember" xlink:label="us-gaap_LoansPayableMember" xlink:title="us-gaap_LoansPayableMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_CreditFacilityDomain" xlink:to="us-gaap_LoansPayableMember" xlink:title="Definition : us-gaap_CreditFacilityDomain to us-gaap_LoansPayableMember" xlink:type="arc" use="optional" order="6" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityDomain" xlink:label="us-gaap_CreditFacilityDomain_1" xlink:title="us-gaap_CreditFacilityDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_CreditFacilityAxis" xlink:to="us-gaap_CreditFacilityDomain_1" xlink:title="Definition : us-gaap_CreditFacilityAxis to us-gaap_CreditFacilityDomain" xlink:type="arc" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubsidiarySaleOfStockAxis" xlink:label="us-gaap_SubsidiarySaleOfStockAxis" xlink:title="us-gaap_SubsidiarySaleOfStockAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_DebtInstrumentTable" xlink:to="us-gaap_SubsidiarySaleOfStockAxis" xlink:title="Definition : us-gaap_DebtInstrumentTable to us-gaap_SubsidiarySaleOfStockAxis" xlink:type="arc" use="optional" order="6" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SaleOfStockNameOfTransactionDomain" xlink:label="us-gaap_SaleOfStockNameOfTransactionDomain" xlink:title="us-gaap_SaleOfStockNameOfTransactionDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_SubsidiarySaleOfStockAxis" xlink:to="us-gaap_SaleOfStockNameOfTransactionDomain" xlink:title="Definition : us-gaap_SubsidiarySaleOfStockAxis to us-gaap_SaleOfStockNameOfTransactionDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_RegisteredDirectOfferingMember" xlink:label="evex_RegisteredDirectOfferingMember" xlink:title="evex_RegisteredDirectOfferingMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_SaleOfStockNameOfTransactionDomain" xlink:to="evex_RegisteredDirectOfferingMember" xlink:title="Definition : us-gaap_SaleOfStockNameOfTransactionDomain to evex_RegisteredDirectOfferingMember" xlink:type="arc" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SaleOfStockNameOfTransactionDomain" xlink:label="us-gaap_SaleOfStockNameOfTransactionDomain_1" xlink:title="us-gaap_SaleOfStockNameOfTransactionDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_SubsidiarySaleOfStockAxis" xlink:to="us-gaap_SaleOfStockNameOfTransactionDomain_1" xlink:title="Definition : us-gaap_SubsidiarySaleOfStockAxis to us-gaap_SaleOfStockNameOfTransactionDomain" xlink:type="arc" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidatedEntitiesAxis" xlink:label="srt_ConsolidatedEntitiesAxis" xlink:title="srt_ConsolidatedEntitiesAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_DebtInstrumentTable" xlink:to="srt_ConsolidatedEntitiesAxis" xlink:title="Definition : us-gaap_DebtInstrumentTable to srt_ConsolidatedEntitiesAxis" xlink:type="arc" use="optional" order="7" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidatedEntitiesDomain" xlink:label="srt_ConsolidatedEntitiesDomain" xlink:title="srt_ConsolidatedEntitiesDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="srt_ConsolidatedEntitiesAxis" xlink:to="srt_ConsolidatedEntitiesDomain" xlink:title="Definition : srt_ConsolidatedEntitiesAxis to srt_ConsolidatedEntitiesDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_EVEUAMLlcMember" xlink:label="evex_EVEUAMLlcMember" xlink:title="evex_EVEUAMLlcMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_ConsolidatedEntitiesDomain" xlink:to="evex_EVEUAMLlcMember" xlink:title="Definition : srt_ConsolidatedEntitiesDomain to evex_EVEUAMLlcMember" xlink:type="arc" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidatedEntitiesDomain" xlink:label="srt_ConsolidatedEntitiesDomain_1" xlink:title="srt_ConsolidatedEntitiesDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="srt_ConsolidatedEntitiesAxis" xlink:to="srt_ConsolidatedEntitiesDomain_1" xlink:title="Definition : srt_ConsolidatedEntitiesAxis to srt_ConsolidatedEntitiesDomain" xlink:type="arc" order="1" xbrldt:closed="false" />
  </link:definitionLink>
  <link:definitionLink xlink:type="extended" xlink:role="http://eveairmobility.com/role/GrantsDetailsTextual">
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GovernmentAssistanceLineItems" xlink:label="us-gaap_GovernmentAssistanceLineItems" xlink:title="us-gaap_GovernmentAssistanceLineItems" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_EconomicSubsidyGrantAuthorizedAmount" xlink:label="evex_EconomicSubsidyGrantAuthorizedAmount" xlink:title="evex_EconomicSubsidyGrantAuthorizedAmount" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_GovernmentAssistanceLineItems" xlink:to="evex_EconomicSubsidyGrantAuthorizedAmount" xlink:title="Definition : us-gaap_GovernmentAssistanceLineItems to evex_EconomicSubsidyGrantAuthorizedAmount" xlink:type="arc" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_ProjectExecutionAmount" xlink:label="evex_ProjectExecutionAmount" xlink:title="evex_ProjectExecutionAmount" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_GovernmentAssistanceLineItems" xlink:to="evex_ProjectExecutionAmount" xlink:title="Definition : us-gaap_GovernmentAssistanceLineItems to evex_ProjectExecutionAmount" xlink:type="arc" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_ProjectResourcesUtilizationPeriod" xlink:label="evex_ProjectResourcesUtilizationPeriod" xlink:title="evex_ProjectResourcesUtilizationPeriod" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_GovernmentAssistanceLineItems" xlink:to="evex_ProjectResourcesUtilizationPeriod" xlink:title="Definition : us-gaap_GovernmentAssistanceLineItems to evex_ProjectResourcesUtilizationPeriod" xlink:type="arc" order="2" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_EconomicSubsidyGrantReceived" xlink:label="evex_EconomicSubsidyGrantReceived" xlink:title="evex_EconomicSubsidyGrantReceived" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_GovernmentAssistanceLineItems" xlink:to="evex_EconomicSubsidyGrantReceived" xlink:title="Definition : us-gaap_GovernmentAssistanceLineItems to evex_EconomicSubsidyGrantReceived" xlink:type="arc" order="3" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_EligibleCostsIncurred" xlink:label="evex_EligibleCostsIncurred" xlink:title="evex_EligibleCostsIncurred" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_GovernmentAssistanceLineItems" xlink:to="evex_EligibleCostsIncurred" xlink:title="Definition : us-gaap_GovernmentAssistanceLineItems to evex_EligibleCostsIncurred" xlink:type="arc" order="4" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_DepositForFunding" xlink:label="evex_DepositForFunding" xlink:title="evex_DepositForFunding" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_GovernmentAssistanceLineItems" xlink:to="evex_DepositForFunding" xlink:title="Definition : us-gaap_GovernmentAssistanceLineItems to evex_DepositForFunding" xlink:type="arc" order="5" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GovernmentAssistanceTable" xlink:label="us-gaap_GovernmentAssistanceTable" xlink:title="us-gaap_GovernmentAssistanceTable" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="us-gaap_GovernmentAssistanceLineItems" xlink:to="us-gaap_GovernmentAssistanceTable" xlink:title="Definition : us-gaap_GovernmentAssistanceLineItems to us-gaap_GovernmentAssistanceTable" xlink:type="arc" order="6" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_AgreementAxis" xlink:label="evex_AgreementAxis" xlink:title="evex_AgreementAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_GovernmentAssistanceTable" xlink:to="evex_AgreementAxis" xlink:title="Definition : us-gaap_GovernmentAssistanceTable to evex_AgreementAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_AgreementDomain" xlink:label="evex_AgreementDomain" xlink:title="evex_AgreementDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="evex_AgreementAxis" xlink:to="evex_AgreementDomain" xlink:title="Definition : evex_AgreementAxis to evex_AgreementDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_GrantAgreementMember" xlink:label="evex_GrantAgreementMember" xlink:title="evex_GrantAgreementMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="evex_AgreementDomain" xlink:to="evex_GrantAgreementMember" xlink:title="Definition : evex_AgreementDomain to evex_GrantAgreementMember" xlink:type="arc" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_AgreementDomain" xlink:label="evex_AgreementDomain_1" xlink:title="evex_AgreementDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="evex_AgreementAxis" xlink:to="evex_AgreementDomain_1" xlink:title="Definition : evex_AgreementAxis to evex_AgreementDomain" xlink:type="arc" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_CounterpartyNameAxis" xlink:label="srt_CounterpartyNameAxis" xlink:title="srt_CounterpartyNameAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_GovernmentAssistanceTable" xlink:to="srt_CounterpartyNameAxis" xlink:title="Definition : us-gaap_GovernmentAssistanceTable to srt_CounterpartyNameAxis" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RepurchaseAgreementCounterpartyNameDomain" xlink:label="srt_RepurchaseAgreementCounterpartyNameDomain" xlink:title="srt_RepurchaseAgreementCounterpartyNameDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="srt_CounterpartyNameAxis" xlink:to="srt_RepurchaseAgreementCounterpartyNameDomain" xlink:title="Definition : srt_CounterpartyNameAxis to srt_RepurchaseAgreementCounterpartyNameDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_FinanciadoraDeEstudosEProjetosMember" xlink:label="evex_FinanciadoraDeEstudosEProjetosMember" xlink:title="evex_FinanciadoraDeEstudosEProjetosMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_RepurchaseAgreementCounterpartyNameDomain" xlink:to="evex_FinanciadoraDeEstudosEProjetosMember" xlink:title="Definition : srt_RepurchaseAgreementCounterpartyNameDomain to evex_FinanciadoraDeEstudosEProjetosMember" xlink:type="arc" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RepurchaseAgreementCounterpartyNameDomain" xlink:label="srt_RepurchaseAgreementCounterpartyNameDomain_1" xlink:title="srt_RepurchaseAgreementCounterpartyNameDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="srt_CounterpartyNameAxis" xlink:to="srt_RepurchaseAgreementCounterpartyNameDomain_1" xlink:title="Definition : srt_CounterpartyNameAxis to srt_RepurchaseAgreementCounterpartyNameDomain" xlink:type="arc" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeAxis" xlink:label="srt_RangeAxis" xlink:title="srt_RangeAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_GovernmentAssistanceTable" xlink:to="srt_RangeAxis" xlink:title="Definition : us-gaap_GovernmentAssistanceTable to srt_RangeAxis" xlink:type="arc" use="optional" order="2" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeMember" xlink:label="srt_RangeMember" xlink:title="srt_RangeMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="srt_RangeAxis" xlink:to="srt_RangeMember" xlink:title="Definition : srt_RangeAxis to srt_RangeMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_MinimumMember" xlink:label="srt_MinimumMember" xlink:title="srt_MinimumMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_RangeMember" xlink:to="srt_MinimumMember" xlink:title="Definition : srt_RangeMember to srt_MinimumMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_MaximumMember" xlink:label="srt_MaximumMember" xlink:title="srt_MaximumMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_RangeMember" xlink:to="srt_MaximumMember" xlink:title="Definition : srt_RangeMember to srt_MaximumMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeMember" xlink:label="srt_RangeMember_1" xlink:title="srt_RangeMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="srt_RangeAxis" xlink:to="srt_RangeMember_1" xlink:title="Definition : srt_RangeAxis to srt_RangeMember" xlink:type="arc" order="1" xbrldt:closed="false" />
  </link:definitionLink>
  <link:definitionLink xlink:type="extended" xlink:role="http://eveairmobility.com/role/CONDENSEDCONSOLIDATEDBALANCESHEETS">
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementLineItems" xlink:label="us-gaap_StatementLineItems" xlink:title="us-gaap_StatementLineItems" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AssetsAbstract" xlink:label="us-gaap_AssetsAbstract" xlink:title="us-gaap_AssetsAbstract" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_StatementLineItems" xlink:to="us-gaap_AssetsAbstract" xlink:title="Definition : us-gaap_StatementLineItems to us-gaap_AssetsAbstract" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AssetsCurrentAbstract" xlink:label="us-gaap_AssetsCurrentAbstract" xlink:title="us-gaap_AssetsCurrentAbstract" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_AssetsAbstract" xlink:to="us-gaap_AssetsCurrentAbstract" xlink:title="Definition : us-gaap_AssetsAbstract to us-gaap_AssetsCurrentAbstract" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:label="us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:title="us-gaap_CashAndCashEquivalentsAtCarryingValue" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_AssetsCurrentAbstract" xlink:to="us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:title="Definition : us-gaap_AssetsCurrentAbstract to us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestrictedCash" xlink:label="us-gaap_RestrictedCash" xlink:title="us-gaap_RestrictedCash" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_AssetsCurrentAbstract" xlink:to="us-gaap_RestrictedCash" xlink:title="Definition : us-gaap_AssetsCurrentAbstract to us-gaap_RestrictedCash" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShortTermInvestments" xlink:label="us-gaap_ShortTermInvestments" xlink:title="us-gaap_ShortTermInvestments" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_AssetsCurrentAbstract" xlink:to="us-gaap_ShortTermInvestments" xlink:title="Definition : us-gaap_AssetsCurrentAbstract to us-gaap_ShortTermInvestments" xlink:type="arc" use="optional" order="2" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherReceivablesNetCurrent" xlink:label="us-gaap_OtherReceivablesNetCurrent" xlink:title="us-gaap_OtherReceivablesNetCurrent" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_AssetsCurrentAbstract" xlink:to="us-gaap_OtherReceivablesNetCurrent" xlink:title="Definition : us-gaap_AssetsCurrentAbstract to us-gaap_OtherReceivablesNetCurrent" xlink:type="arc" use="optional" order="3" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherAssetsCurrent" xlink:label="us-gaap_OtherAssetsCurrent" xlink:title="us-gaap_OtherAssetsCurrent" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_AssetsCurrentAbstract" xlink:to="us-gaap_OtherAssetsCurrent" xlink:title="Definition : us-gaap_AssetsCurrentAbstract to us-gaap_OtherAssetsCurrent" xlink:type="arc" use="optional" order="4" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AssetsCurrent" xlink:label="us-gaap_AssetsCurrent" xlink:title="us-gaap_AssetsCurrent" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_AssetsCurrentAbstract" xlink:to="us-gaap_AssetsCurrent" xlink:title="Definition : us-gaap_AssetsCurrentAbstract to us-gaap_AssetsCurrent" xlink:type="arc" use="optional" order="5" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AssetsNoncurrentAbstract" xlink:label="us-gaap_AssetsNoncurrentAbstract" xlink:title="us-gaap_AssetsNoncurrentAbstract" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_AssetsAbstract" xlink:to="us-gaap_AssetsNoncurrentAbstract" xlink:title="Definition : us-gaap_AssetsAbstract to us-gaap_AssetsNoncurrentAbstract" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherReceivableAfterAllowanceForCreditLossNoncurrent" xlink:label="us-gaap_OtherReceivableAfterAllowanceForCreditLossNoncurrent" xlink:title="us-gaap_OtherReceivableAfterAllowanceForCreditLossNoncurrent" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_AssetsNoncurrentAbstract" xlink:to="us-gaap_OtherReceivableAfterAllowanceForCreditLossNoncurrent" xlink:title="Definition : us-gaap_AssetsNoncurrentAbstract to us-gaap_OtherReceivableAfterAllowanceForCreditLossNoncurrent" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentNet" xlink:label="us-gaap_PropertyPlantAndEquipmentNet" xlink:title="us-gaap_PropertyPlantAndEquipmentNet" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_AssetsNoncurrentAbstract" xlink:to="us-gaap_PropertyPlantAndEquipmentNet" xlink:title="Definition : us-gaap_AssetsNoncurrentAbstract to us-gaap_PropertyPlantAndEquipmentNet" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingLeaseRightOfUseAsset" xlink:label="us-gaap_OperatingLeaseRightOfUseAsset" xlink:title="us-gaap_OperatingLeaseRightOfUseAsset" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_AssetsNoncurrentAbstract" xlink:to="us-gaap_OperatingLeaseRightOfUseAsset" xlink:title="Definition : us-gaap_AssetsNoncurrentAbstract to us-gaap_OperatingLeaseRightOfUseAsset" xlink:type="arc" use="optional" order="2" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CapitalizedComputerSoftwareNet" xlink:label="us-gaap_CapitalizedComputerSoftwareNet" xlink:title="us-gaap_CapitalizedComputerSoftwareNet" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_AssetsNoncurrentAbstract" xlink:to="us-gaap_CapitalizedComputerSoftwareNet" xlink:title="Definition : us-gaap_AssetsNoncurrentAbstract to us-gaap_CapitalizedComputerSoftwareNet" xlink:type="arc" use="optional" order="3" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredIncomeTaxAssetsNet" xlink:label="us-gaap_DeferredIncomeTaxAssetsNet" xlink:title="us-gaap_DeferredIncomeTaxAssetsNet" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_AssetsNoncurrentAbstract" xlink:to="us-gaap_DeferredIncomeTaxAssetsNet" xlink:title="Definition : us-gaap_AssetsNoncurrentAbstract to us-gaap_DeferredIncomeTaxAssetsNet" xlink:type="arc" use="optional" order="4" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherAssetsNoncurrent" xlink:label="us-gaap_OtherAssetsNoncurrent" xlink:title="us-gaap_OtherAssetsNoncurrent" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_AssetsNoncurrentAbstract" xlink:to="us-gaap_OtherAssetsNoncurrent" xlink:title="Definition : us-gaap_AssetsNoncurrentAbstract to us-gaap_OtherAssetsNoncurrent" xlink:type="arc" use="optional" order="5" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AssetsNoncurrent" xlink:label="us-gaap_AssetsNoncurrent" xlink:title="us-gaap_AssetsNoncurrent" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_AssetsNoncurrentAbstract" xlink:to="us-gaap_AssetsNoncurrent" xlink:title="Definition : us-gaap_AssetsNoncurrentAbstract to us-gaap_AssetsNoncurrent" xlink:type="arc" use="optional" order="6" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_Assets" xlink:label="us-gaap_Assets" xlink:title="us-gaap_Assets" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_AssetsAbstract" xlink:to="us-gaap_Assets" xlink:title="Definition : us-gaap_AssetsAbstract to us-gaap_Assets" xlink:type="arc" use="optional" order="2" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LiabilitiesAndStockholdersEquityAbstract" xlink:label="us-gaap_LiabilitiesAndStockholdersEquityAbstract" xlink:title="us-gaap_LiabilitiesAndStockholdersEquityAbstract" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_StatementLineItems" xlink:to="us-gaap_LiabilitiesAndStockholdersEquityAbstract" xlink:title="Definition : us-gaap_StatementLineItems to us-gaap_LiabilitiesAndStockholdersEquityAbstract" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LiabilitiesCurrentAbstract" xlink:label="us-gaap_LiabilitiesCurrentAbstract" xlink:title="us-gaap_LiabilitiesCurrentAbstract" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_LiabilitiesAndStockholdersEquityAbstract" xlink:to="us-gaap_LiabilitiesCurrentAbstract" xlink:title="Definition : us-gaap_LiabilitiesAndStockholdersEquityAbstract to us-gaap_LiabilitiesCurrentAbstract" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccountsPayableCurrent" xlink:label="us-gaap_AccountsPayableCurrent" xlink:title="us-gaap_AccountsPayableCurrent" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_LiabilitiesCurrentAbstract" xlink:to="us-gaap_AccountsPayableCurrent" xlink:title="Definition : us-gaap_LiabilitiesCurrentAbstract to us-gaap_AccountsPayableCurrent" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccountsPayableOtherCurrent" xlink:label="us-gaap_AccountsPayableOtherCurrent" xlink:title="us-gaap_AccountsPayableOtherCurrent" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_LiabilitiesCurrentAbstract" xlink:to="us-gaap_AccountsPayableOtherCurrent" xlink:title="Definition : us-gaap_LiabilitiesCurrentAbstract to us-gaap_AccountsPayableOtherCurrent" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongTermDebtCurrent" xlink:label="us-gaap_LongTermDebtCurrent" xlink:title="us-gaap_LongTermDebtCurrent" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_LiabilitiesCurrentAbstract" xlink:to="us-gaap_LongTermDebtCurrent" xlink:title="Definition : us-gaap_LiabilitiesCurrentAbstract to us-gaap_LongTermDebtCurrent" xlink:type="arc" use="optional" order="2" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeLiabilitiesCurrent" xlink:label="us-gaap_DerivativeLiabilitiesCurrent" xlink:title="us-gaap_DerivativeLiabilitiesCurrent" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_LiabilitiesCurrentAbstract" xlink:to="us-gaap_DerivativeLiabilitiesCurrent" xlink:title="Definition : us-gaap_LiabilitiesCurrentAbstract to us-gaap_DerivativeLiabilitiesCurrent" xlink:type="arc" use="optional" order="3" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherLiabilitiesCurrent" xlink:label="us-gaap_OtherLiabilitiesCurrent" xlink:title="us-gaap_OtherLiabilitiesCurrent" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_LiabilitiesCurrentAbstract" xlink:to="us-gaap_OtherLiabilitiesCurrent" xlink:title="Definition : us-gaap_LiabilitiesCurrentAbstract to us-gaap_OtherLiabilitiesCurrent" xlink:type="arc" use="optional" order="4" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LiabilitiesCurrent" xlink:label="us-gaap_LiabilitiesCurrent" xlink:title="us-gaap_LiabilitiesCurrent" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_LiabilitiesCurrentAbstract" xlink:to="us-gaap_LiabilitiesCurrent" xlink:title="Definition : us-gaap_LiabilitiesCurrentAbstract to us-gaap_LiabilitiesCurrent" xlink:type="arc" use="optional" order="5" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LiabilitiesNoncurrentAbstract" xlink:label="us-gaap_LiabilitiesNoncurrentAbstract" xlink:title="us-gaap_LiabilitiesNoncurrentAbstract" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_LiabilitiesAndStockholdersEquityAbstract" xlink:to="us-gaap_LiabilitiesNoncurrentAbstract" xlink:title="Definition : us-gaap_LiabilitiesAndStockholdersEquityAbstract to us-gaap_LiabilitiesNoncurrentAbstract" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongTermDebtNoncurrent" xlink:label="us-gaap_LongTermDebtNoncurrent" xlink:title="us-gaap_LongTermDebtNoncurrent" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_LiabilitiesNoncurrentAbstract" xlink:to="us-gaap_LongTermDebtNoncurrent" xlink:title="Definition : us-gaap_LiabilitiesNoncurrentAbstract to us-gaap_LongTermDebtNoncurrent" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherLiabilitiesNoncurrent" xlink:label="us-gaap_OtherLiabilitiesNoncurrent" xlink:title="us-gaap_OtherLiabilitiesNoncurrent" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_LiabilitiesNoncurrentAbstract" xlink:to="us-gaap_OtherLiabilitiesNoncurrent" xlink:title="Definition : us-gaap_LiabilitiesNoncurrentAbstract to us-gaap_OtherLiabilitiesNoncurrent" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherAccruedLiabilitiesNoncurrent" xlink:label="us-gaap_OtherAccruedLiabilitiesNoncurrent" xlink:title="us-gaap_OtherAccruedLiabilitiesNoncurrent" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_LiabilitiesNoncurrentAbstract" xlink:to="us-gaap_OtherAccruedLiabilitiesNoncurrent" xlink:title="Definition : us-gaap_LiabilitiesNoncurrentAbstract to us-gaap_OtherAccruedLiabilitiesNoncurrent" xlink:type="arc" use="optional" order="2" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LiabilitiesNoncurrent" xlink:label="us-gaap_LiabilitiesNoncurrent" xlink:title="us-gaap_LiabilitiesNoncurrent" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_LiabilitiesNoncurrentAbstract" xlink:to="us-gaap_LiabilitiesNoncurrent" xlink:title="Definition : us-gaap_LiabilitiesNoncurrentAbstract to us-gaap_LiabilitiesNoncurrent" xlink:type="arc" use="optional" order="3" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_Liabilities" xlink:label="us-gaap_Liabilities" xlink:title="us-gaap_Liabilities" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_LiabilitiesAndStockholdersEquityAbstract" xlink:to="us-gaap_Liabilities" xlink:title="Definition : us-gaap_LiabilitiesAndStockholdersEquityAbstract to us-gaap_Liabilities" xlink:type="arc" use="optional" order="2" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommitmentsAndContingencies" xlink:label="us-gaap_CommitmentsAndContingencies" xlink:title="us-gaap_CommitmentsAndContingencies" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_LiabilitiesAndStockholdersEquityAbstract" xlink:to="us-gaap_CommitmentsAndContingencies" xlink:title="Definition : us-gaap_LiabilitiesAndStockholdersEquityAbstract to us-gaap_CommitmentsAndContingencies" xlink:type="arc" use="optional" order="3" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockholdersEquityAbstract" xlink:label="us-gaap_StockholdersEquityAbstract" xlink:title="us-gaap_StockholdersEquityAbstract" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_LiabilitiesAndStockholdersEquityAbstract" xlink:to="us-gaap_StockholdersEquityAbstract" xlink:title="Definition : us-gaap_LiabilitiesAndStockholdersEquityAbstract to us-gaap_StockholdersEquityAbstract" xlink:type="arc" use="optional" order="4" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockValue" xlink:label="us-gaap_CommonStockValue" xlink:title="us-gaap_CommonStockValue" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_StockholdersEquityAbstract" xlink:to="us-gaap_CommonStockValue" xlink:title="Definition : us-gaap_StockholdersEquityAbstract to us-gaap_CommonStockValue" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AdditionalPaidInCapitalCommonStock" xlink:label="us-gaap_AdditionalPaidInCapitalCommonStock" xlink:title="us-gaap_AdditionalPaidInCapitalCommonStock" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_StockholdersEquityAbstract" xlink:to="us-gaap_AdditionalPaidInCapitalCommonStock" xlink:title="Definition : us-gaap_StockholdersEquityAbstract to us-gaap_AdditionalPaidInCapitalCommonStock" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RetainedEarningsAccumulatedDeficit" xlink:label="us-gaap_RetainedEarningsAccumulatedDeficit" xlink:title="us-gaap_RetainedEarningsAccumulatedDeficit" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_StockholdersEquityAbstract" xlink:to="us-gaap_RetainedEarningsAccumulatedDeficit" xlink:title="Definition : us-gaap_StockholdersEquityAbstract to us-gaap_RetainedEarningsAccumulatedDeficit" xlink:type="arc" use="optional" order="2" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockholdersEquity" xlink:label="us-gaap_StockholdersEquity" xlink:title="us-gaap_StockholdersEquity" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_StockholdersEquityAbstract" xlink:to="us-gaap_StockholdersEquity" xlink:title="Definition : us-gaap_StockholdersEquityAbstract to us-gaap_StockholdersEquity" xlink:type="arc" use="optional" order="3" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LiabilitiesAndStockholdersEquity" xlink:label="us-gaap_LiabilitiesAndStockholdersEquity" xlink:title="us-gaap_LiabilitiesAndStockholdersEquity" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_LiabilitiesAndStockholdersEquityAbstract" xlink:to="us-gaap_LiabilitiesAndStockholdersEquity" xlink:title="Definition : us-gaap_LiabilitiesAndStockholdersEquityAbstract to us-gaap_LiabilitiesAndStockholdersEquity" xlink:type="arc" use="optional" order="5" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementTable" xlink:label="us-gaap_StatementTable" xlink:title="us-gaap_StatementTable" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="us-gaap_StatementLineItems" xlink:to="us-gaap_StatementTable" xlink:title="Definition : us-gaap_StatementLineItems to us-gaap_StatementTable" xlink:type="arc" order="2" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:label="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:title="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_StatementTable" xlink:to="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:title="Definition : us-gaap_StatementTable to us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain" xlink:label="us-gaap_RelatedPartyDomain" xlink:title="us-gaap_RelatedPartyDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:to="us-gaap_RelatedPartyDomain" xlink:title="Definition : us-gaap_RelatedPartyTransactionsByRelatedPartyAxis to us-gaap_RelatedPartyDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyMember" xlink:label="us-gaap_RelatedPartyMember" xlink:title="us-gaap_RelatedPartyMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyDomain" xlink:to="us-gaap_RelatedPartyMember" xlink:title="Definition : us-gaap_RelatedPartyDomain to us-gaap_RelatedPartyMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NonrelatedPartyMember" xlink:label="us-gaap_NonrelatedPartyMember" xlink:title="us-gaap_NonrelatedPartyMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyDomain" xlink:to="us-gaap_NonrelatedPartyMember" xlink:title="Definition : us-gaap_RelatedPartyDomain to us-gaap_NonrelatedPartyMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain" xlink:label="us-gaap_RelatedPartyDomain_1" xlink:title="us-gaap_RelatedPartyDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:to="us-gaap_RelatedPartyDomain_1" xlink:title="Definition : us-gaap_RelatedPartyTransactionsByRelatedPartyAxis to us-gaap_RelatedPartyDomain" xlink:type="arc" order="1" xbrldt:closed="false" />
  </link:definitionLink>
  <link:definitionLink xlink:type="extended" xlink:role="http://eveairmobility.com/role/OtherBalanceSheetComponentsDetails3Textuals">
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentLineItems" xlink:label="us-gaap_PropertyPlantAndEquipmentLineItems" xlink:title="us-gaap_PropertyPlantAndEquipmentLineItems" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_Depreciation" xlink:label="us-gaap_Depreciation" xlink:title="us-gaap_Depreciation" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_PropertyPlantAndEquipmentLineItems" xlink:to="us-gaap_Depreciation" xlink:title="Definition : us-gaap_PropertyPlantAndEquipmentLineItems to us-gaap_Depreciation" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_Supplies" xlink:label="us-gaap_Supplies" xlink:title="us-gaap_Supplies" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_PropertyPlantAndEquipmentLineItems" xlink:to="us-gaap_Supplies" xlink:title="Definition : us-gaap_PropertyPlantAndEquipmentLineItems to us-gaap_Supplies" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetUsefulLife" xlink:label="us-gaap_FiniteLivedIntangibleAssetUsefulLife" xlink:title="us-gaap_FiniteLivedIntangibleAssetUsefulLife" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_PropertyPlantAndEquipmentLineItems" xlink:to="us-gaap_FiniteLivedIntangibleAssetUsefulLife" xlink:title="Definition : us-gaap_PropertyPlantAndEquipmentLineItems to us-gaap_FiniteLivedIntangibleAssetUsefulLife" xlink:type="arc" use="optional" order="2" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsCostIncurredToRenewOrExtend" xlink:label="us-gaap_FiniteLivedIntangibleAssetsCostIncurredToRenewOrExtend" xlink:title="us-gaap_FiniteLivedIntangibleAssetsCostIncurredToRenewOrExtend" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_PropertyPlantAndEquipmentLineItems" xlink:to="us-gaap_FiniteLivedIntangibleAssetsCostIncurredToRenewOrExtend" xlink:title="Definition : us-gaap_PropertyPlantAndEquipmentLineItems to us-gaap_FiniteLivedIntangibleAssetsCostIncurredToRenewOrExtend" xlink:type="arc" use="optional" order="3" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfPropertyPlantAndEquipmentTable" xlink:label="us-gaap_ScheduleOfPropertyPlantAndEquipmentTable" xlink:title="us-gaap_ScheduleOfPropertyPlantAndEquipmentTable" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="us-gaap_PropertyPlantAndEquipmentLineItems" xlink:to="us-gaap_ScheduleOfPropertyPlantAndEquipmentTable" xlink:title="Definition : us-gaap_PropertyPlantAndEquipmentLineItems to us-gaap_ScheduleOfPropertyPlantAndEquipmentTable" xlink:type="arc" order="4" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis" xlink:label="us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis" xlink:title="us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ScheduleOfPropertyPlantAndEquipmentTable" xlink:to="us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis" xlink:title="Definition : us-gaap_ScheduleOfPropertyPlantAndEquipmentTable to us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:label="us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:title="us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis" xlink:to="us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:title="Definition : us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis to us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ComputerSoftwareIntangibleAssetMember" xlink:label="us-gaap_ComputerSoftwareIntangibleAssetMember" xlink:title="us-gaap_ComputerSoftwareIntangibleAssetMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:to="us-gaap_ComputerSoftwareIntangibleAssetMember" xlink:title="Definition : us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain to us-gaap_ComputerSoftwareIntangibleAssetMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:label="us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_1" xlink:title="us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis" xlink:to="us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_1" xlink:title="Definition : us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis to us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:type="arc" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeAxis" xlink:label="srt_RangeAxis" xlink:title="srt_RangeAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ScheduleOfPropertyPlantAndEquipmentTable" xlink:to="srt_RangeAxis" xlink:title="Definition : us-gaap_ScheduleOfPropertyPlantAndEquipmentTable to srt_RangeAxis" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeMember" xlink:label="srt_RangeMember" xlink:title="srt_RangeMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="srt_RangeAxis" xlink:to="srt_RangeMember" xlink:title="Definition : srt_RangeAxis to srt_RangeMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_MinimumMember" xlink:label="srt_MinimumMember" xlink:title="srt_MinimumMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_RangeMember" xlink:to="srt_MinimumMember" xlink:title="Definition : srt_RangeMember to srt_MinimumMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_MaximumMember" xlink:label="srt_MaximumMember" xlink:title="srt_MaximumMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_RangeMember" xlink:to="srt_MaximumMember" xlink:title="Definition : srt_RangeMember to srt_MaximumMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeMember" xlink:label="srt_RangeMember_1" xlink:title="srt_RangeMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="srt_RangeAxis" xlink:to="srt_RangeMember_1" xlink:title="Definition : srt_RangeAxis to srt_RangeMember" xlink:type="arc" order="1" xbrldt:closed="false" />
  </link:definitionLink>
  <link:definitionLink xlink:type="extended" xlink:role="http://eveairmobility.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFEQUITY">
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementLineItems" xlink:label="us-gaap_StatementLineItems" xlink:title="us-gaap_StatementLineItems" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInStockholdersEquityRollForward" xlink:label="us-gaap_IncreaseDecreaseInStockholdersEquityRollForward" xlink:title="us-gaap_IncreaseDecreaseInStockholdersEquityRollForward" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_StatementLineItems" xlink:to="us-gaap_IncreaseDecreaseInStockholdersEquityRollForward" xlink:title="Definition : us-gaap_StatementLineItems to us-gaap_IncreaseDecreaseInStockholdersEquityRollForward" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockholdersEquity" xlink:label="us-gaap_StockholdersEquity" xlink:title="us-gaap_StockholdersEquity" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_IncreaseDecreaseInStockholdersEquityRollForward" xlink:to="us-gaap_StockholdersEquity" xlink:title="Definition : us-gaap_IncreaseDecreaseInStockholdersEquityRollForward to us-gaap_StockholdersEquity" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SharesOutstanding" xlink:label="us-gaap_SharesOutstanding" xlink:title="us-gaap_SharesOutstanding" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_IncreaseDecreaseInStockholdersEquityRollForward" xlink:to="us-gaap_SharesOutstanding" xlink:title="Definition : us-gaap_IncreaseDecreaseInStockholdersEquityRollForward to us-gaap_SharesOutstanding" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetIncomeLoss" xlink:label="us-gaap_NetIncomeLoss" xlink:title="us-gaap_NetIncomeLoss" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_IncreaseDecreaseInStockholdersEquityRollForward" xlink:to="us-gaap_NetIncomeLoss" xlink:title="Definition : us-gaap_IncreaseDecreaseInStockholdersEquityRollForward to us-gaap_NetIncomeLoss" xlink:type="arc" use="optional" order="2" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation" xlink:label="us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation" xlink:title="us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_IncreaseDecreaseInStockholdersEquityRollForward" xlink:to="us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation" xlink:title="Definition : us-gaap_IncreaseDecreaseInStockholdersEquityRollForward to us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation" xlink:type="arc" use="optional" order="3" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation" xlink:label="us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation" xlink:title="us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_IncreaseDecreaseInStockholdersEquityRollForward" xlink:to="us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation" xlink:title="Definition : us-gaap_IncreaseDecreaseInStockholdersEquityRollForward to us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation" xlink:type="arc" use="optional" order="4" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures" xlink:label="us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures" xlink:title="us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_IncreaseDecreaseInStockholdersEquityRollForward" xlink:to="us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures" xlink:title="Definition : us-gaap_IncreaseDecreaseInStockholdersEquityRollForward to us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures" xlink:type="arc" use="optional" order="5" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures" xlink:label="us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures" xlink:title="us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_IncreaseDecreaseInStockholdersEquityRollForward" xlink:to="us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures" xlink:title="Definition : us-gaap_IncreaseDecreaseInStockholdersEquityRollForward to us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures" xlink:type="arc" use="optional" order="6" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationRestrictedStockUnitsRequisiteServicePeriodRecognition" xlink:label="us-gaap_AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationRestrictedStockUnitsRequisiteServicePeriodRecognition" xlink:title="us-gaap_AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationRestrictedStockUnitsRequisiteServicePeriodRecognition" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_IncreaseDecreaseInStockholdersEquityRollForward" xlink:to="us-gaap_AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationRestrictedStockUnitsRequisiteServicePeriodRecognition" xlink:title="Definition : us-gaap_IncreaseDecreaseInStockholdersEquityRollForward to us-gaap_AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationRestrictedStockUnitsRequisiteServicePeriodRecognition" xlink:type="arc" use="optional" order="7" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementTable" xlink:label="us-gaap_StatementTable" xlink:title="us-gaap_StatementTable" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="us-gaap_StatementLineItems" xlink:to="us-gaap_StatementTable" xlink:title="Definition : us-gaap_StatementLineItems to us-gaap_StatementTable" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementEquityComponentsAxis" xlink:label="us-gaap_StatementEquityComponentsAxis" xlink:title="us-gaap_StatementEquityComponentsAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_StatementTable" xlink:to="us-gaap_StatementEquityComponentsAxis" xlink:title="Definition : us-gaap_StatementTable to us-gaap_StatementEquityComponentsAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquityComponentDomain" xlink:label="us-gaap_EquityComponentDomain" xlink:title="us-gaap_EquityComponentDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_StatementEquityComponentsAxis" xlink:to="us-gaap_EquityComponentDomain" xlink:title="Definition : us-gaap_StatementEquityComponentsAxis to us-gaap_EquityComponentDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockMember" xlink:label="us-gaap_CommonStockMember" xlink:title="us-gaap_CommonStockMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EquityComponentDomain" xlink:to="us-gaap_CommonStockMember" xlink:title="Definition : us-gaap_EquityComponentDomain to us-gaap_CommonStockMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AdditionalPaidInCapitalMember" xlink:label="us-gaap_AdditionalPaidInCapitalMember" xlink:title="us-gaap_AdditionalPaidInCapitalMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EquityComponentDomain" xlink:to="us-gaap_AdditionalPaidInCapitalMember" xlink:title="Definition : us-gaap_EquityComponentDomain to us-gaap_AdditionalPaidInCapitalMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RetainedEarningsMember" xlink:label="us-gaap_RetainedEarningsMember" xlink:title="us-gaap_RetainedEarningsMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EquityComponentDomain" xlink:to="us-gaap_RetainedEarningsMember" xlink:title="Definition : us-gaap_EquityComponentDomain to us-gaap_RetainedEarningsMember" xlink:type="arc" use="optional" order="2" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquityComponentDomain" xlink:label="us-gaap_EquityComponentDomain_1" xlink:title="us-gaap_EquityComponentDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_StatementEquityComponentsAxis" xlink:to="us-gaap_EquityComponentDomain_1" xlink:title="Definition : us-gaap_StatementEquityComponentsAxis to us-gaap_EquityComponentDomain" xlink:type="arc" order="1" xbrldt:closed="false" />
  </link:definitionLink>
  <link:definitionLink xlink:type="extended" xlink:role="http://eveairmobility.com/role/IncomeTaxesDetailsTextuals">
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_IncomeTaxDisclosureLineItemsIncomeTaxDisclosureLineItemsIncomeTaxDisclosureLineItems" xlink:label="evex_IncomeTaxDisclosureLineItemsIncomeTaxDisclosureLineItemsIncomeTaxDisclosureLineItems" xlink:title="evex_IncomeTaxDisclosureLineItemsIncomeTaxDisclosureLineItemsIncomeTaxDisclosureLineItems" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubsidiaryOrEquityMethodInvesteeCumulativePercentageOwnershipAfterAllTransactions" xlink:label="us-gaap_SubsidiaryOrEquityMethodInvesteeCumulativePercentageOwnershipAfterAllTransactions" xlink:title="us-gaap_SubsidiaryOrEquityMethodInvesteeCumulativePercentageOwnershipAfterAllTransactions" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="evex_IncomeTaxDisclosureLineItemsIncomeTaxDisclosureLineItemsIncomeTaxDisclosureLineItems" xlink:to="us-gaap_SubsidiaryOrEquityMethodInvesteeCumulativePercentageOwnershipAfterAllTransactions" xlink:title="Definition : evex_IncomeTaxDisclosureLineItemsIncomeTaxDisclosureLineItemsIncomeTaxDisclosureLineItems to us-gaap_SubsidiaryOrEquityMethodInvesteeCumulativePercentageOwnershipAfterAllTransactions" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance" xlink:label="us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance" xlink:title="us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="evex_IncomeTaxDisclosureLineItemsIncomeTaxDisclosureLineItemsIncomeTaxDisclosureLineItems" xlink:to="us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance" xlink:title="Definition : evex_IncomeTaxDisclosureLineItemsIncomeTaxDisclosureLineItemsIncomeTaxDisclosureLineItems to us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount" xlink:label="us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount" xlink:title="us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="evex_IncomeTaxDisclosureLineItemsIncomeTaxDisclosureLineItemsIncomeTaxDisclosureLineItems" xlink:to="us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount" xlink:title="Definition : evex_IncomeTaxDisclosureLineItemsIncomeTaxDisclosureLineItemsIncomeTaxDisclosureLineItems to us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount" xlink:type="arc" use="optional" order="2" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_UnrecognizedTaxBenefits" xlink:label="us-gaap_UnrecognizedTaxBenefits" xlink:title="us-gaap_UnrecognizedTaxBenefits" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="evex_IncomeTaxDisclosureLineItemsIncomeTaxDisclosureLineItemsIncomeTaxDisclosureLineItems" xlink:to="us-gaap_UnrecognizedTaxBenefits" xlink:title="Definition : evex_IncomeTaxDisclosureLineItemsIncomeTaxDisclosureLineItemsIncomeTaxDisclosureLineItems to us-gaap_UnrecognizedTaxBenefits" xlink:type="arc" use="optional" order="3" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_UnrecognizedTaxBenefitsPeriodIncreaseDecrease" xlink:label="us-gaap_UnrecognizedTaxBenefitsPeriodIncreaseDecrease" xlink:title="us-gaap_UnrecognizedTaxBenefitsPeriodIncreaseDecrease" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="evex_IncomeTaxDisclosureLineItemsIncomeTaxDisclosureLineItemsIncomeTaxDisclosureLineItems" xlink:to="us-gaap_UnrecognizedTaxBenefitsPeriodIncreaseDecrease" xlink:title="Definition : evex_IncomeTaxDisclosureLineItemsIncomeTaxDisclosureLineItemsIncomeTaxDisclosureLineItems to us-gaap_UnrecognizedTaxBenefitsPeriodIncreaseDecrease" xlink:type="arc" use="optional" order="4" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued" xlink:label="us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued" xlink:title="us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="evex_IncomeTaxDisclosureLineItemsIncomeTaxDisclosureLineItemsIncomeTaxDisclosureLineItems" xlink:to="us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued" xlink:title="Definition : evex_IncomeTaxDisclosureLineItemsIncomeTaxDisclosureLineItemsIncomeTaxDisclosureLineItems to us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued" xlink:type="arc" use="optional" order="5" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquityMethodInvestmentOwnershipPercentage" xlink:label="us-gaap_EquityMethodInvestmentOwnershipPercentage" xlink:title="us-gaap_EquityMethodInvestmentOwnershipPercentage" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="evex_IncomeTaxDisclosureLineItemsIncomeTaxDisclosureLineItemsIncomeTaxDisclosureLineItems" xlink:to="us-gaap_EquityMethodInvestmentOwnershipPercentage" xlink:title="Definition : evex_IncomeTaxDisclosureLineItemsIncomeTaxDisclosureLineItemsIncomeTaxDisclosureLineItems to us-gaap_EquityMethodInvestmentOwnershipPercentage" xlink:type="arc" use="optional" order="6" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_NetOperatingLossesExpenseEffectOfChangeInAllocationTaxReturnMethodology" xlink:label="evex_NetOperatingLossesExpenseEffectOfChangeInAllocationTaxReturnMethodology" xlink:title="evex_NetOperatingLossesExpenseEffectOfChangeInAllocationTaxReturnMethodology" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="evex_IncomeTaxDisclosureLineItemsIncomeTaxDisclosureLineItemsIncomeTaxDisclosureLineItems" xlink:to="evex_NetOperatingLossesExpenseEffectOfChangeInAllocationTaxReturnMethodology" xlink:title="Definition : evex_IncomeTaxDisclosureLineItemsIncomeTaxDisclosureLineItemsIncomeTaxDisclosureLineItems to evex_NetOperatingLossesExpenseEffectOfChangeInAllocationTaxReturnMethodology" xlink:type="arc" use="optional" order="7" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_PercentageOfTaxBenefitsArisingFromTaxBasis" xlink:label="evex_PercentageOfTaxBenefitsArisingFromTaxBasis" xlink:title="evex_PercentageOfTaxBenefitsArisingFromTaxBasis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="evex_IncomeTaxDisclosureLineItemsIncomeTaxDisclosureLineItemsIncomeTaxDisclosureLineItems" xlink:to="evex_PercentageOfTaxBenefitsArisingFromTaxBasis" xlink:title="Definition : evex_IncomeTaxDisclosureLineItemsIncomeTaxDisclosureLineItemsIncomeTaxDisclosureLineItems to evex_PercentageOfTaxBenefitsArisingFromTaxBasis" xlink:type="arc" use="optional" order="8" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeTaxExpenseBenefit" xlink:label="us-gaap_IncomeTaxExpenseBenefit" xlink:title="us-gaap_IncomeTaxExpenseBenefit" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="evex_IncomeTaxDisclosureLineItemsIncomeTaxDisclosureLineItemsIncomeTaxDisclosureLineItems" xlink:to="us-gaap_IncomeTaxExpenseBenefit" xlink:title="Definition : evex_IncomeTaxDisclosureLineItemsIncomeTaxDisclosureLineItemsIncomeTaxDisclosureLineItems to us-gaap_IncomeTaxExpenseBenefit" xlink:type="arc" use="optional" order="9" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_IncomeTaxDisclosureTable" xlink:label="evex_IncomeTaxDisclosureTable" xlink:title="evex_IncomeTaxDisclosureTable" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="evex_IncomeTaxDisclosureLineItemsIncomeTaxDisclosureLineItemsIncomeTaxDisclosureLineItems" xlink:to="evex_IncomeTaxDisclosureTable" xlink:title="Definition : evex_IncomeTaxDisclosureLineItemsIncomeTaxDisclosureLineItemsIncomeTaxDisclosureLineItems to evex_IncomeTaxDisclosureTable" xlink:type="arc" order="10" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementBusinessSegmentsAxis" xlink:label="us-gaap_StatementBusinessSegmentsAxis" xlink:title="us-gaap_StatementBusinessSegmentsAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="evex_IncomeTaxDisclosureTable" xlink:to="us-gaap_StatementBusinessSegmentsAxis" xlink:title="Definition : evex_IncomeTaxDisclosureTable to us-gaap_StatementBusinessSegmentsAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentDomain" xlink:label="us-gaap_SegmentDomain" xlink:title="us-gaap_SegmentDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_StatementBusinessSegmentsAxis" xlink:to="us-gaap_SegmentDomain" xlink:title="Definition : us-gaap_StatementBusinessSegmentsAxis to us-gaap_SegmentDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_UrbanAirMobilityMember" xlink:label="evex_UrbanAirMobilityMember" xlink:title="evex_UrbanAirMobilityMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_SegmentDomain" xlink:to="evex_UrbanAirMobilityMember" xlink:title="Definition : us-gaap_SegmentDomain to evex_UrbanAirMobilityMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentDomain" xlink:label="us-gaap_SegmentDomain_1" xlink:title="us-gaap_SegmentDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_StatementBusinessSegmentsAxis" xlink:to="us-gaap_SegmentDomain_1" xlink:title="Definition : us-gaap_StatementBusinessSegmentsAxis to us-gaap_SegmentDomain" xlink:type="arc" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_StatementGeographicalAxis" xlink:label="srt_StatementGeographicalAxis" xlink:title="srt_StatementGeographicalAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="evex_IncomeTaxDisclosureTable" xlink:to="srt_StatementGeographicalAxis" xlink:title="Definition : evex_IncomeTaxDisclosureTable to srt_StatementGeographicalAxis" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_SegmentGeographicalDomain" xlink:label="srt_SegmentGeographicalDomain" xlink:title="srt_SegmentGeographicalDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="srt_StatementGeographicalAxis" xlink:to="srt_SegmentGeographicalDomain" xlink:title="Definition : srt_StatementGeographicalAxis to srt_SegmentGeographicalDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/country/2025/country-2025.xsd#country_US" xlink:label="country_US" xlink:title="country_US" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_SegmentGeographicalDomain" xlink:to="country_US" xlink:title="Definition : srt_SegmentGeographicalDomain to country_US" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/country/2025/country-2025.xsd#country_BR" xlink:label="country_BR" xlink:title="country_BR" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_SegmentGeographicalDomain" xlink:to="country_BR" xlink:title="Definition : srt_SegmentGeographicalDomain to country_BR" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_SegmentGeographicalDomain" xlink:label="srt_SegmentGeographicalDomain_1" xlink:title="srt_SegmentGeographicalDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="srt_StatementGeographicalAxis" xlink:to="srt_SegmentGeographicalDomain_1" xlink:title="Definition : srt_StatementGeographicalAxis to srt_SegmentGeographicalDomain" xlink:type="arc" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis" xlink:title="dei_LegalEntityAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="evex_IncomeTaxDisclosureTable" xlink:to="dei_LegalEntityAxis" xlink:title="Definition : evex_IncomeTaxDisclosureTable to dei_LegalEntityAxis" xlink:type="arc" use="optional" order="2" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain" xlink:title="dei_EntityDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain" xlink:title="Definition : dei_LegalEntityAxis to dei_EntityDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_OneCorporationMember" xlink:label="evex_OneCorporationMember" xlink:title="evex_OneCorporationMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_EntityDomain" xlink:to="evex_OneCorporationMember" xlink:title="Definition : dei_EntityDomain to evex_OneCorporationMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="dei_EntityDomain_1" xlink:title="dei_EntityDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="dei_LegalEntityAxis" xlink:to="dei_EntityDomain_1" xlink:title="Definition : dei_LegalEntityAxis to dei_EntityDomain" xlink:type="arc" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_AgreementAxis" xlink:label="evex_AgreementAxis" xlink:title="evex_AgreementAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="evex_IncomeTaxDisclosureTable" xlink:to="evex_AgreementAxis" xlink:title="Definition : evex_IncomeTaxDisclosureTable to evex_AgreementAxis" xlink:type="arc" use="optional" order="3" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_AgreementDomain" xlink:label="evex_AgreementDomain" xlink:title="evex_AgreementDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="evex_AgreementAxis" xlink:to="evex_AgreementDomain" xlink:title="Definition : evex_AgreementAxis to evex_AgreementDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_TaxSharingAgreementMember" xlink:label="evex_TaxSharingAgreementMember" xlink:title="evex_TaxSharingAgreementMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="evex_AgreementDomain" xlink:to="evex_TaxSharingAgreementMember" xlink:title="Definition : evex_AgreementDomain to evex_TaxSharingAgreementMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_TaxReceivableAgreementMember" xlink:label="evex_TaxReceivableAgreementMember" xlink:title="evex_TaxReceivableAgreementMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="evex_AgreementDomain" xlink:to="evex_TaxReceivableAgreementMember" xlink:title="Definition : evex_AgreementDomain to evex_TaxReceivableAgreementMember" xlink:type="arc" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_AgreementDomain" xlink:label="evex_AgreementDomain_1" xlink:title="evex_AgreementDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="evex_AgreementAxis" xlink:to="evex_AgreementDomain_1" xlink:title="Definition : evex_AgreementAxis to evex_AgreementDomain" xlink:type="arc" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis" xlink:label="srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis" xlink:title="srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="evex_IncomeTaxDisclosureTable" xlink:to="srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis" xlink:title="Definition : evex_IncomeTaxDisclosureTable to srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis" xlink:type="arc" use="optional" order="4" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_EquityMethodInvesteeNameDomain" xlink:label="srt_EquityMethodInvesteeNameDomain" xlink:title="srt_EquityMethodInvesteeNameDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis" xlink:to="srt_EquityMethodInvesteeNameDomain" xlink:title="Definition : srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis to srt_EquityMethodInvesteeNameDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_EmbraerAircraftHoldingIncMember" xlink:label="evex_EmbraerAircraftHoldingIncMember" xlink:title="evex_EmbraerAircraftHoldingIncMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="evex_EmbraerAircraftHoldingIncMember" xlink:title="Definition : srt_EquityMethodInvesteeNameDomain to evex_EmbraerAircraftHoldingIncMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_EquityMethodInvesteeNameDomain" xlink:label="srt_EquityMethodInvesteeNameDomain_1" xlink:title="srt_EquityMethodInvesteeNameDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis" xlink:to="srt_EquityMethodInvesteeNameDomain_1" xlink:title="Definition : srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis to srt_EquityMethodInvesteeNameDomain" xlink:type="arc" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidatedEntitiesAxis" xlink:label="srt_ConsolidatedEntitiesAxis" xlink:title="srt_ConsolidatedEntitiesAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="evex_IncomeTaxDisclosureTable" xlink:to="srt_ConsolidatedEntitiesAxis" xlink:title="Definition : evex_IncomeTaxDisclosureTable to srt_ConsolidatedEntitiesAxis" xlink:type="arc" use="optional" order="5" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidatedEntitiesDomain" xlink:label="srt_ConsolidatedEntitiesDomain" xlink:title="srt_ConsolidatedEntitiesDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="srt_ConsolidatedEntitiesAxis" xlink:to="srt_ConsolidatedEntitiesDomain" xlink:title="Definition : srt_ConsolidatedEntitiesAxis to srt_ConsolidatedEntitiesDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_EVEUAMLlcMember" xlink:label="evex_EVEUAMLlcMember" xlink:title="evex_EVEUAMLlcMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_ConsolidatedEntitiesDomain" xlink:to="evex_EVEUAMLlcMember" xlink:title="Definition : srt_ConsolidatedEntitiesDomain to evex_EVEUAMLlcMember" xlink:type="arc" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidatedEntitiesDomain" xlink:label="srt_ConsolidatedEntitiesDomain_1" xlink:title="srt_ConsolidatedEntitiesDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="srt_ConsolidatedEntitiesAxis" xlink:to="srt_ConsolidatedEntitiesDomain_1" xlink:title="Definition : srt_ConsolidatedEntitiesAxis to srt_ConsolidatedEntitiesDomain" xlink:type="arc" order="1" xbrldt:closed="false" />
  </link:definitionLink>
  <link:definitionLink xlink:type="extended" xlink:role="http://eveairmobility.com/role/CommitmentsandContingenciesDetails">
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_CommitmentsAndContingenciesDisclosureLineItems" xlink:label="evex_CommitmentsAndContingenciesDisclosureLineItems" xlink:title="evex_CommitmentsAndContingenciesDisclosureLineItems" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SaleOfStockConsiderationReceivedPerTransaction" xlink:label="us-gaap_SaleOfStockConsiderationReceivedPerTransaction" xlink:title="us-gaap_SaleOfStockConsiderationReceivedPerTransaction" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="evex_CommitmentsAndContingenciesDisclosureLineItems" xlink:to="us-gaap_SaleOfStockConsiderationReceivedPerTransaction" xlink:title="Definition : evex_CommitmentsAndContingenciesDisclosureLineItems to us-gaap_SaleOfStockConsiderationReceivedPerTransaction" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentCovenantDescription" xlink:label="us-gaap_DebtInstrumentCovenantDescription" xlink:title="us-gaap_DebtInstrumentCovenantDescription" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="evex_CommitmentsAndContingenciesDisclosureLineItems" xlink:to="us-gaap_DebtInstrumentCovenantDescription" xlink:title="Definition : evex_CommitmentsAndContingenciesDisclosureLineItems to us-gaap_DebtInstrumentCovenantDescription" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_GrantOfFundingNumberOfExpectedInstallments" xlink:label="evex_GrantOfFundingNumberOfExpectedInstallments" xlink:title="evex_GrantOfFundingNumberOfExpectedInstallments" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="evex_CommitmentsAndContingenciesDisclosureLineItems" xlink:to="evex_GrantOfFundingNumberOfExpectedInstallments" xlink:title="Definition : evex_CommitmentsAndContingenciesDisclosureLineItems to evex_GrantOfFundingNumberOfExpectedInstallments" xlink:type="arc" order="2" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_CommitmentsAndContingenciesDisclosureTable" xlink:label="evex_CommitmentsAndContingenciesDisclosureTable" xlink:title="evex_CommitmentsAndContingenciesDisclosureTable" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="evex_CommitmentsAndContingenciesDisclosureLineItems" xlink:to="evex_CommitmentsAndContingenciesDisclosureTable" xlink:title="Definition : evex_CommitmentsAndContingenciesDisclosureLineItems to evex_CommitmentsAndContingenciesDisclosureTable" xlink:type="arc" order="3" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_AgreementAxis" xlink:label="evex_AgreementAxis" xlink:title="evex_AgreementAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="evex_CommitmentsAndContingenciesDisclosureTable" xlink:to="evex_AgreementAxis" xlink:title="Definition : evex_CommitmentsAndContingenciesDisclosureTable to evex_AgreementAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_AgreementDomain" xlink:label="evex_AgreementDomain" xlink:title="evex_AgreementDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="evex_AgreementAxis" xlink:to="evex_AgreementDomain" xlink:title="Definition : evex_AgreementAxis to evex_AgreementDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_GrantAgreementMember" xlink:label="evex_GrantAgreementMember" xlink:title="evex_GrantAgreementMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="evex_AgreementDomain" xlink:to="evex_GrantAgreementMember" xlink:title="Definition : evex_AgreementDomain to evex_GrantAgreementMember" xlink:type="arc" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_SubscriptionAgreementsMember" xlink:label="evex_SubscriptionAgreementsMember" xlink:title="evex_SubscriptionAgreementsMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="evex_AgreementDomain" xlink:to="evex_SubscriptionAgreementsMember" xlink:title="Definition : evex_AgreementDomain to evex_SubscriptionAgreementsMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_AgreementDomain" xlink:label="evex_AgreementDomain_1" xlink:title="evex_AgreementDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="evex_AgreementAxis" xlink:to="evex_AgreementDomain_1" xlink:title="Definition : evex_AgreementAxis to evex_AgreementDomain" xlink:type="arc" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_CounterpartyNameAxis" xlink:label="srt_CounterpartyNameAxis" xlink:title="srt_CounterpartyNameAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="evex_CommitmentsAndContingenciesDisclosureTable" xlink:to="srt_CounterpartyNameAxis" xlink:title="Definition : evex_CommitmentsAndContingenciesDisclosureTable to srt_CounterpartyNameAxis" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RepurchaseAgreementCounterpartyNameDomain" xlink:label="srt_RepurchaseAgreementCounterpartyNameDomain" xlink:title="srt_RepurchaseAgreementCounterpartyNameDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="srt_CounterpartyNameAxis" xlink:to="srt_RepurchaseAgreementCounterpartyNameDomain" xlink:title="Definition : srt_CounterpartyNameAxis to srt_RepurchaseAgreementCounterpartyNameDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_FinanciadoraDeEstudosEProjetosMember" xlink:label="evex_FinanciadoraDeEstudosEProjetosMember" xlink:title="evex_FinanciadoraDeEstudosEProjetosMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_RepurchaseAgreementCounterpartyNameDomain" xlink:to="evex_FinanciadoraDeEstudosEProjetosMember" xlink:title="Definition : srt_RepurchaseAgreementCounterpartyNameDomain to evex_FinanciadoraDeEstudosEProjetosMember" xlink:type="arc" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RepurchaseAgreementCounterpartyNameDomain" xlink:label="srt_RepurchaseAgreementCounterpartyNameDomain_1" xlink:title="srt_RepurchaseAgreementCounterpartyNameDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="srt_CounterpartyNameAxis" xlink:to="srt_RepurchaseAgreementCounterpartyNameDomain_1" xlink:title="Definition : srt_CounterpartyNameAxis to srt_RepurchaseAgreementCounterpartyNameDomain" xlink:type="arc" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeAxis" xlink:label="srt_RangeAxis" xlink:title="srt_RangeAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="evex_CommitmentsAndContingenciesDisclosureTable" xlink:to="srt_RangeAxis" xlink:title="Definition : evex_CommitmentsAndContingenciesDisclosureTable to srt_RangeAxis" xlink:type="arc" use="optional" order="2" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeMember" xlink:label="srt_RangeMember" xlink:title="srt_RangeMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="srt_RangeAxis" xlink:to="srt_RangeMember" xlink:title="Definition : srt_RangeAxis to srt_RangeMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_MinimumMember" xlink:label="srt_MinimumMember" xlink:title="srt_MinimumMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_RangeMember" xlink:to="srt_MinimumMember" xlink:title="Definition : srt_RangeMember to srt_MinimumMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_MaximumMember" xlink:label="srt_MaximumMember" xlink:title="srt_MaximumMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_RangeMember" xlink:to="srt_MaximumMember" xlink:title="Definition : srt_RangeMember to srt_MaximumMember" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeMember" xlink:label="srt_RangeMember_1" xlink:title="srt_RangeMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="srt_RangeAxis" xlink:to="srt_RangeMember_1" xlink:title="Definition : srt_RangeAxis to srt_RangeMember" xlink:type="arc" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityAxis" xlink:label="us-gaap_CreditFacilityAxis" xlink:title="us-gaap_CreditFacilityAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="evex_CommitmentsAndContingenciesDisclosureTable" xlink:to="us-gaap_CreditFacilityAxis" xlink:title="Definition : evex_CommitmentsAndContingenciesDisclosureTable to us-gaap_CreditFacilityAxis" xlink:type="arc" use="optional" order="3" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityDomain" xlink:label="us-gaap_CreditFacilityDomain" xlink:title="us-gaap_CreditFacilityDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_CreditFacilityAxis" xlink:to="us-gaap_CreditFacilityDomain" xlink:title="Definition : us-gaap_CreditFacilityAxis to us-gaap_CreditFacilityDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LoansPayableMember" xlink:label="us-gaap_LoansPayableMember" xlink:title="us-gaap_LoansPayableMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_CreditFacilityDomain" xlink:to="us-gaap_LoansPayableMember" xlink:title="Definition : us-gaap_CreditFacilityDomain to us-gaap_LoansPayableMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityDomain" xlink:label="us-gaap_CreditFacilityDomain_1" xlink:title="us-gaap_CreditFacilityDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_CreditFacilityAxis" xlink:to="us-gaap_CreditFacilityDomain_1" xlink:title="Definition : us-gaap_CreditFacilityAxis to us-gaap_CreditFacilityDomain" xlink:type="arc" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditFacilityAxis" xlink:label="us-gaap_LineOfCreditFacilityAxis" xlink:title="us-gaap_LineOfCreditFacilityAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="evex_CommitmentsAndContingenciesDisclosureTable" xlink:to="us-gaap_LineOfCreditFacilityAxis" xlink:title="Definition : evex_CommitmentsAndContingenciesDisclosureTable to us-gaap_LineOfCreditFacilityAxis" xlink:type="arc" use="optional" order="4" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditFacilityLenderDomain" xlink:label="us-gaap_LineOfCreditFacilityLenderDomain" xlink:title="us-gaap_LineOfCreditFacilityLenderDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_LineOfCreditFacilityAxis" xlink:to="us-gaap_LineOfCreditFacilityLenderDomain" xlink:title="Definition : us-gaap_LineOfCreditFacilityAxis to us-gaap_LineOfCreditFacilityLenderDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_BrazilsNationalDevelopmentBankMember" xlink:label="evex_BrazilsNationalDevelopmentBankMember" xlink:title="evex_BrazilsNationalDevelopmentBankMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_LineOfCreditFacilityLenderDomain" xlink:to="evex_BrazilsNationalDevelopmentBankMember" xlink:title="Definition : us-gaap_LineOfCreditFacilityLenderDomain to evex_BrazilsNationalDevelopmentBankMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditFacilityLenderDomain" xlink:label="us-gaap_LineOfCreditFacilityLenderDomain_1" xlink:title="us-gaap_LineOfCreditFacilityLenderDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_LineOfCreditFacilityAxis" xlink:to="us-gaap_LineOfCreditFacilityLenderDomain_1" xlink:title="Definition : us-gaap_LineOfCreditFacilityAxis to us-gaap_LineOfCreditFacilityLenderDomain" xlink:type="arc" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubsidiarySaleOfStockAxis" xlink:label="us-gaap_SubsidiarySaleOfStockAxis" xlink:title="us-gaap_SubsidiarySaleOfStockAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="evex_CommitmentsAndContingenciesDisclosureTable" xlink:to="us-gaap_SubsidiarySaleOfStockAxis" xlink:title="Definition : evex_CommitmentsAndContingenciesDisclosureTable to us-gaap_SubsidiarySaleOfStockAxis" xlink:type="arc" use="optional" order="5" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SaleOfStockNameOfTransactionDomain" xlink:label="us-gaap_SaleOfStockNameOfTransactionDomain" xlink:title="us-gaap_SaleOfStockNameOfTransactionDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_SubsidiarySaleOfStockAxis" xlink:to="us-gaap_SaleOfStockNameOfTransactionDomain" xlink:title="Definition : us-gaap_SubsidiarySaleOfStockAxis to us-gaap_SaleOfStockNameOfTransactionDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_RegisteredDirectOfferingMember" xlink:label="evex_RegisteredDirectOfferingMember" xlink:title="evex_RegisteredDirectOfferingMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_SaleOfStockNameOfTransactionDomain" xlink:to="evex_RegisteredDirectOfferingMember" xlink:title="Definition : us-gaap_SaleOfStockNameOfTransactionDomain to evex_RegisteredDirectOfferingMember" xlink:type="arc" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SaleOfStockNameOfTransactionDomain" xlink:label="us-gaap_SaleOfStockNameOfTransactionDomain_1" xlink:title="us-gaap_SaleOfStockNameOfTransactionDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_SubsidiarySaleOfStockAxis" xlink:to="us-gaap_SaleOfStockNameOfTransactionDomain_1" xlink:title="Definition : us-gaap_SubsidiarySaleOfStockAxis to us-gaap_SaleOfStockNameOfTransactionDomain" xlink:type="arc" order="1" xbrldt:closed="false" />
  </link:definitionLink>
  <link:definitionLink xlink:type="extended" xlink:role="http://eveairmobility.com/role/SellingGeneralandAdministrativeExpensesDetails">
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_ScheduleOfSellingGeneralAndAdministrativeExpenseLineItems" xlink:label="evex_ScheduleOfSellingGeneralAndAdministrativeExpenseLineItems" xlink:title="evex_ScheduleOfSellingGeneralAndAdministrativeExpenseLineItems" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_OutsourcedServiceExpense" xlink:label="evex_OutsourcedServiceExpense" xlink:title="evex_OutsourcedServiceExpense" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="evex_ScheduleOfSellingGeneralAndAdministrativeExpenseLineItems" xlink:to="evex_OutsourcedServiceExpense" xlink:title="Definition : evex_ScheduleOfSellingGeneralAndAdministrativeExpenseLineItems to evex_OutsourcedServiceExpense" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EmployeeBenefitsAndShareBasedCompensation" xlink:label="us-gaap_EmployeeBenefitsAndShareBasedCompensation" xlink:title="us-gaap_EmployeeBenefitsAndShareBasedCompensation" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="evex_ScheduleOfSellingGeneralAndAdministrativeExpenseLineItems" xlink:to="us-gaap_EmployeeBenefitsAndShareBasedCompensation" xlink:title="Definition : evex_ScheduleOfSellingGeneralAndAdministrativeExpenseLineItems to us-gaap_EmployeeBenefitsAndShareBasedCompensation" xlink:type="arc" use="optional" order="1" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_DirectorAndOfficersInsuranceExpense" xlink:label="evex_DirectorAndOfficersInsuranceExpense" xlink:title="evex_DirectorAndOfficersInsuranceExpense" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="evex_ScheduleOfSellingGeneralAndAdministrativeExpenseLineItems" xlink:to="evex_DirectorAndOfficersInsuranceExpense" xlink:title="Definition : evex_ScheduleOfSellingGeneralAndAdministrativeExpenseLineItems to evex_DirectorAndOfficersInsuranceExpense" xlink:type="arc" use="optional" order="2" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherSellingGeneralAndAdministrativeExpense" xlink:label="us-gaap_OtherSellingGeneralAndAdministrativeExpense" xlink:title="us-gaap_OtherSellingGeneralAndAdministrativeExpense" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="evex_ScheduleOfSellingGeneralAndAdministrativeExpenseLineItems" xlink:to="us-gaap_OtherSellingGeneralAndAdministrativeExpense" xlink:title="Definition : evex_ScheduleOfSellingGeneralAndAdministrativeExpenseLineItems to us-gaap_OtherSellingGeneralAndAdministrativeExpense" xlink:type="arc" use="optional" order="3" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TravelAndEntertainmentExpense" xlink:label="us-gaap_TravelAndEntertainmentExpense" xlink:title="us-gaap_TravelAndEntertainmentExpense" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="evex_ScheduleOfSellingGeneralAndAdministrativeExpenseLineItems" xlink:to="us-gaap_TravelAndEntertainmentExpense" xlink:title="Definition : evex_ScheduleOfSellingGeneralAndAdministrativeExpenseLineItems to us-gaap_TravelAndEntertainmentExpense" xlink:type="arc" use="optional" order="4" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_TransactionCostRecognizedAsExpense" xlink:label="evex_TransactionCostRecognizedAsExpense" xlink:title="evex_TransactionCostRecognizedAsExpense" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="evex_ScheduleOfSellingGeneralAndAdministrativeExpenseLineItems" xlink:to="evex_TransactionCostRecognizedAsExpense" xlink:title="Definition : evex_ScheduleOfSellingGeneralAndAdministrativeExpenseLineItems to evex_TransactionCostRecognizedAsExpense" xlink:type="arc" use="optional" order="5" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SellingGeneralAndAdministrativeExpense" xlink:label="us-gaap_SellingGeneralAndAdministrativeExpense" xlink:title="us-gaap_SellingGeneralAndAdministrativeExpense" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="evex_ScheduleOfSellingGeneralAndAdministrativeExpenseLineItems" xlink:to="us-gaap_SellingGeneralAndAdministrativeExpense" xlink:title="Definition : evex_ScheduleOfSellingGeneralAndAdministrativeExpenseLineItems to us-gaap_SellingGeneralAndAdministrativeExpense" xlink:type="arc" use="optional" order="6" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="evex-20260630.xsd#evex_ScheduleOfSellingGeneralAndAdministrativeExpenseTable" xlink:label="evex_ScheduleOfSellingGeneralAndAdministrativeExpenseTable" xlink:title="evex_ScheduleOfSellingGeneralAndAdministrativeExpenseTable" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="evex_ScheduleOfSellingGeneralAndAdministrativeExpenseLineItems" xlink:to="evex_ScheduleOfSellingGeneralAndAdministrativeExpenseTable" xlink:title="Definition : evex_ScheduleOfSellingGeneralAndAdministrativeExpenseLineItems to evex_ScheduleOfSellingGeneralAndAdministrativeExpenseTable" xlink:type="arc" order="7" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeStatementLocationAxis" xlink:label="us-gaap_IncomeStatementLocationAxis" xlink:title="us-gaap_IncomeStatementLocationAxis" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="evex_ScheduleOfSellingGeneralAndAdministrativeExpenseTable" xlink:to="us-gaap_IncomeStatementLocationAxis" xlink:title="Definition : evex_ScheduleOfSellingGeneralAndAdministrativeExpenseTable to us-gaap_IncomeStatementLocationAxis" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeStatementLocationDomain" xlink:label="us-gaap_IncomeStatementLocationDomain" xlink:title="us-gaap_IncomeStatementLocationDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_IncomeStatementLocationAxis" xlink:to="us-gaap_IncomeStatementLocationDomain" xlink:title="Definition : us-gaap_IncomeStatementLocationAxis to us-gaap_IncomeStatementLocationDomain" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SellingGeneralAndAdministrativeExpensesMember" xlink:label="us-gaap_SellingGeneralAndAdministrativeExpensesMember" xlink:title="us-gaap_SellingGeneralAndAdministrativeExpensesMember" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_IncomeStatementLocationDomain" xlink:to="us-gaap_SellingGeneralAndAdministrativeExpensesMember" xlink:title="Definition : us-gaap_IncomeStatementLocationDomain to us-gaap_SellingGeneralAndAdministrativeExpensesMember" xlink:type="arc" use="optional" order="0" xbrldt:closed="false" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeStatementLocationDomain" xlink:label="us-gaap_IncomeStatementLocationDomain_1" xlink:title="us-gaap_IncomeStatementLocationDomain" />
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_IncomeStatementLocationAxis" xlink:to="us-gaap_IncomeStatementLocationDomain_1" xlink:title="Definition : us-gaap_IncomeStatementLocationAxis to us-gaap_IncomeStatementLocationDomain" xlink:type="arc" order="1" xbrldt:closed="false" />
  </link:definitionLink>
  <link:definitionLink xlink:type="extended" xlink:role="http://eveairmobility.com/role/CONDENSEDCONSOLIDATEDBALANCESHEETSParenthetical" />
  <link:definitionLink xlink:type="extended" xlink:role="http://eveairmobility.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFOPERATIONS" />
  <link:definitionLink xlink:type="extended" xlink:role="http://eveairmobility.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCOMPREHENSIVELOSS" />
  <link:definitionLink xlink:type="extended" xlink:role="http://eveairmobility.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS" />
  <link:definitionLink xlink:type="extended" xlink:role="http://eveairmobility.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWSParenthetical" />
  <link:definitionLink xlink:type="extended" xlink:role="http://eveairmobility.com/role/OrganizationandBasisofPresentation" />
  <link:definitionLink xlink:type="extended" xlink:role="http://eveairmobility.com/role/SummaryOfSignificantAccountingPolicies" />
  <link:definitionLink xlink:type="extended" xlink:role="http://eveairmobility.com/role/CashandCashEquivalents" />
  <link:definitionLink xlink:type="extended" xlink:role="http://eveairmobility.com/role/FinancialInvestments" />
  <link:definitionLink xlink:type="extended" xlink:role="http://eveairmobility.com/role/RelatedPartyTransactions" />
  <link:definitionLink xlink:type="extended" xlink:role="http://eveairmobility.com/role/OtherBalanceSheetComponents" />
  <link:definitionLink xlink:type="extended" xlink:role="http://eveairmobility.com/role/Debt" />
  <link:definitionLink xlink:type="extended" xlink:role="http://eveairmobility.com/role/Equity" />
  <link:definitionLink xlink:type="extended" xlink:role="http://eveairmobility.com/role/CommonStockWarrants" />
  <link:definitionLink xlink:type="extended" xlink:role="http://eveairmobility.com/role/WarrantLiability" />
  <link:definitionLink xlink:type="extended" xlink:role="http://eveairmobility.com/role/FairValueMeasurements" />
  <link:definitionLink xlink:type="extended" xlink:role="http://eveairmobility.com/role/ShareBasedCompensation" />
  <link:definitionLink xlink:type="extended" xlink:role="http://eveairmobility.com/role/EarningsPerShare" />
  <link:definitionLink xlink:type="extended" xlink:role="http://eveairmobility.com/role/ResearchandDevelopmentExpenses" />
  <link:definitionLink xlink:type="extended" xlink:role="http://eveairmobility.com/role/SellingGeneralandAdministrativeExpenses" />
  <link:definitionLink xlink:type="extended" xlink:role="http://eveairmobility.com/role/IncomeTaxes" />
  <link:definitionLink xlink:type="extended" xlink:role="http://eveairmobility.com/role/Leases" />
  <link:definitionLink xlink:type="extended" xlink:role="http://eveairmobility.com/role/CommitmentsandContingencies" />
  <link:definitionLink xlink:type="extended" xlink:role="http://eveairmobility.com/role/Segments" />
  <link:definitionLink xlink:type="extended" xlink:role="http://eveairmobility.com/role/Grants" />
  <link:definitionLink xlink:type="extended" xlink:role="http://eveairmobility.com/role/SubsequentEvents" />
  <link:definitionLink xlink:type="extended" xlink:role="http://eveairmobility.com/role/OrganizationandBasisofPresentationPolicies" />
  <link:definitionLink xlink:type="extended" xlink:role="http://eveairmobility.com/role/OrganizationandBasisofPresentationTables" />
  <link:definitionLink xlink:type="extended" xlink:role="http://eveairmobility.com/role/CashandCashEquivalentsTables" />
  <link:definitionLink xlink:type="extended" xlink:role="http://eveairmobility.com/role/FinancialInvestmentsTables" />
  <link:definitionLink xlink:type="extended" xlink:role="http://eveairmobility.com/role/RelatedPartyTransactionsTables" />
  <link:definitionLink xlink:type="extended" xlink:role="http://eveairmobility.com/role/OtherBalanceSheetComponentsTables" />
  <link:definitionLink xlink:type="extended" xlink:role="http://eveairmobility.com/role/DebtTables" />
  <link:definitionLink xlink:type="extended" xlink:role="http://eveairmobility.com/role/EquityTables" />
  <link:definitionLink xlink:type="extended" xlink:role="http://eveairmobility.com/role/CommonStockWarrantsTables" />
  <link:definitionLink xlink:type="extended" xlink:role="http://eveairmobility.com/role/FairValueMeasurementsTables" />
  <link:definitionLink xlink:type="extended" xlink:role="http://eveairmobility.com/role/EarningsPerShareTables" />
  <link:definitionLink xlink:type="extended" xlink:role="http://eveairmobility.com/role/ResearchAndDevelopmentTables" />
  <link:definitionLink xlink:type="extended" xlink:role="http://eveairmobility.com/role/SellingGeneralandAdministrativeExpensesTables" />
  <link:definitionLink xlink:type="extended" xlink:role="http://eveairmobility.com/role/IncomeTaxesTables" />
  <link:definitionLink xlink:type="extended" xlink:role="http://eveairmobility.com/role/LeasesTables" />
  <link:definitionLink xlink:type="extended" xlink:role="http://eveairmobility.com/role/SegmentsTables" />
  <link:definitionLink xlink:type="extended" xlink:role="http://eveairmobility.com/role/CashandCashEquivalentsDetails" />
  <link:definitionLink xlink:type="extended" xlink:role="http://eveairmobility.com/role/FinancialInvestmentsDetails1Textuals" />
  <link:definitionLink xlink:type="extended" xlink:role="http://eveairmobility.com/role/RelatedPartyTransactionsDetails1" />
  <link:definitionLink xlink:type="extended" xlink:role="http://eveairmobility.com/role/DebtDetails" />
  <link:definitionLink xlink:type="extended" xlink:role="http://eveairmobility.com/role/DebtDetailsCalc2" />
  <link:definitionLink xlink:type="extended" xlink:role="http://eveairmobility.com/role/DebtDetails1" />
  <link:definitionLink xlink:type="extended" xlink:role="http://eveairmobility.com/role/EarningsPerShareDetails" />
  <link:definitionLink xlink:type="extended" xlink:role="http://eveairmobility.com/role/EarningsPerShareDetails2Textuals" />
  <link:definitionLink xlink:type="extended" xlink:role="http://eveairmobility.com/role/CommitmentsandContingenciesDetailsTextuals" />
  <link:definitionLink xlink:type="extended" xlink:role="http://eveairmobility.com/role/SegmentsDetails1Textuals" />
  <link:definitionLink xlink:type="extended" xlink:role="http://eveairmobility.com/role/ShareBasedCompensationScheduleofsharebasedcompensationplanexpenseandtaxbenefitsDetails" />
  <link:definitionLink xlink:type="extended" xlink:role="http://eveairmobility.com/role/LeasesDetails2" />
  <link:definitionLink xlink:type="extended" xlink:role="http://eveairmobility.com/role/FairvaluemeasurementDetails4" />
  <link:definitionLink xlink:type="extended" xlink:role="http://eveairmobility.com/role/FinancialandforeignexchangegainnetDetails" />
  <link:definitionLink xlink:type="extended" xlink:role="http://eveairmobility.com/role/FinancialandforeignexchangegainnetDetailsCalc2" />
  <link:definitionLink xlink:type="extended" xlink:role="http://eveairmobility.com/role/IncomeTaxesDetails2" />
  <link:definitionLink xlink:type="extended" xlink:role="http://eveairmobility.com/role/IncomeTaxesDetails3" />
  <link:definitionLink xlink:type="extended" xlink:role="http://eveairmobility.com/role/OtherBalanceSheetComponentsDetails2" />
</link:linkbase>
