<?xml version="1.0" encoding="UTF-8"?>

<!--XBRL Document Created with the Workiva Platform-->
<!--Copyright 2026 Workiva-->
<!--r:019e0416-4ef6-717c-932c-1520868d88b6,g:7ac2dad7-2a2c-487f-b8ce-904ff5269dff-->
<link:linkbase xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" 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/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-default" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-default"/>
  <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/domain-member" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#domain-member"/>
  <link:roleRef roleURI="http://www.jobyaviation.com/role/CoverPage" xlink:type="simple" xlink:href="joby-20260630.xsd#CoverPage"/>
  <link:definitionLink xlink:role="http://www.jobyaviation.com/role/CoverPage" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentInformationLineItems_019e0416-4f9a-70af-b479-e1eff800cfb5" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_DocumentInformationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentInformationTable_019e0416-4f9a-7a1e-b1c4-da41e2f91cec" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_DocumentInformationTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_dei_DocumentInformationLineItems_019e0416-4f9a-70af-b479-e1eff800cfb5" xlink:to="loc_dei_DocumentInformationTable_019e0416-4f9a-7a1e-b1c4-da41e2f91cec" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementClassOfStockAxis_019e0416-4f9a-7888-ae13-7468a2930549" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementClassOfStockAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_dei_DocumentInformationTable_019e0416-4f9a-7a1e-b1c4-da41e2f91cec" xlink:to="loc_us-gaap_StatementClassOfStockAxis_019e0416-4f9a-7888-ae13-7468a2930549" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_019e0416-4f9a-7888-ae13-7468a2930549_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementClassOfStockAxis_019e0416-4f9a-7888-ae13-7468a2930549" xlink:to="loc_us-gaap_ClassOfStockDomain_019e0416-4f9a-7888-ae13-7468a2930549_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_019e0416-4f9a-7417-8f7a-7e1e68f112dc" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementClassOfStockAxis_019e0416-4f9a-7888-ae13-7468a2930549" xlink:to="loc_us-gaap_ClassOfStockDomain_019e0416-4f9a-7417-8f7a-7e1e68f112dc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockMember_019e0416-4f9a-79df-801d-4c4c4f4984c7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_019e0416-4f9a-7417-8f7a-7e1e68f112dc" xlink:to="loc_us-gaap_CommonStockMember_019e0416-4f9a-79df-801d-4c4c4f4984c7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WarrantMember_019e0416-4f9a-78ce-ba91-fb3a90a6cbb4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_WarrantMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_019e0416-4f9a-7417-8f7a-7e1e68f112dc" xlink:to="loc_us-gaap_WarrantMember_019e0416-4f9a-78ce-ba91-fb3a90a6cbb4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentType_019e0416-4f9a-7b8d-8f73-0f1acf169b11" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_DocumentType"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019e0416-4f9a-70af-b479-e1eff800cfb5" xlink:to="loc_dei_DocumentType_019e0416-4f9a-7b8d-8f73-0f1acf169b11" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentQuarterlyReport_019e0416-4f9a-7103-8813-2193c0652acf" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_DocumentQuarterlyReport"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019e0416-4f9a-70af-b479-e1eff800cfb5" xlink:to="loc_dei_DocumentQuarterlyReport_019e0416-4f9a-7103-8813-2193c0652acf" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentPeriodEndDate_019e0416-4f9a-7705-8d69-eb91f54e7058" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_DocumentPeriodEndDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019e0416-4f9a-70af-b479-e1eff800cfb5" xlink:to="loc_dei_DocumentPeriodEndDate_019e0416-4f9a-7705-8d69-eb91f54e7058" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentTransitionReport_019e0416-4f9a-75b1-9580-3ffcf40bec9a" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_DocumentTransitionReport"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019e0416-4f9a-70af-b479-e1eff800cfb5" xlink:to="loc_dei_DocumentTransitionReport_019e0416-4f9a-75b1-9580-3ffcf40bec9a" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityFileNumber_019e0416-4f9a-783e-823f-3c90287348c8" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityFileNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019e0416-4f9a-70af-b479-e1eff800cfb5" xlink:to="loc_dei_EntityFileNumber_019e0416-4f9a-783e-823f-3c90287348c8" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityRegistrantName_019e0416-4f9a-714d-abb0-c69d5250c8ef" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityRegistrantName"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019e0416-4f9a-70af-b479-e1eff800cfb5" xlink:to="loc_dei_EntityRegistrantName_019e0416-4f9a-714d-abb0-c69d5250c8ef" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityIncorporationStateCountryCode_019e0416-4f9a-7011-bb96-ec6c5b174d0a" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityIncorporationStateCountryCode"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019e0416-4f9a-70af-b479-e1eff800cfb5" xlink:to="loc_dei_EntityIncorporationStateCountryCode_019e0416-4f9a-7011-bb96-ec6c5b174d0a" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityTaxIdentificationNumber_019e0416-4f9a-722d-9914-8c03483a7d8a" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityTaxIdentificationNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019e0416-4f9a-70af-b479-e1eff800cfb5" xlink:to="loc_dei_EntityTaxIdentificationNumber_019e0416-4f9a-722d-9914-8c03483a7d8a" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressAddressLine1_019e0416-4f9a-77ee-be48-a9875bfa146e" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityAddressAddressLine1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019e0416-4f9a-70af-b479-e1eff800cfb5" xlink:to="loc_dei_EntityAddressAddressLine1_019e0416-4f9a-77ee-be48-a9875bfa146e" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressCityOrTown_019e0416-4f9a-7fd2-8b2c-ea5fe0d24615" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityAddressCityOrTown"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019e0416-4f9a-70af-b479-e1eff800cfb5" xlink:to="loc_dei_EntityAddressCityOrTown_019e0416-4f9a-7fd2-8b2c-ea5fe0d24615" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressStateOrProvince_019e0416-4f9a-79e6-91fa-b2e2b51f0308" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityAddressStateOrProvince"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019e0416-4f9a-70af-b479-e1eff800cfb5" xlink:to="loc_dei_EntityAddressStateOrProvince_019e0416-4f9a-79e6-91fa-b2e2b51f0308" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressPostalZipCode_019e0416-4f9a-7d93-a973-45fe003bf4cc" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityAddressPostalZipCode"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019e0416-4f9a-70af-b479-e1eff800cfb5" xlink:to="loc_dei_EntityAddressPostalZipCode_019e0416-4f9a-7d93-a973-45fe003bf4cc" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_CityAreaCode_019e0416-4f9a-7f9e-9771-548ca9bbaed3" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_CityAreaCode"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019e0416-4f9a-70af-b479-e1eff800cfb5" xlink:to="loc_dei_CityAreaCode_019e0416-4f9a-7f9e-9771-548ca9bbaed3" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LocalPhoneNumber_019e0416-4f9a-7fca-8f32-e6065d2759c3" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_LocalPhoneNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019e0416-4f9a-70af-b479-e1eff800cfb5" xlink:to="loc_dei_LocalPhoneNumber_019e0416-4f9a-7fca-8f32-e6065d2759c3" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_Security12bTitle_019e0416-4f9a-7dfd-8d06-7e1b7cbbdc15" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_Security12bTitle"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019e0416-4f9a-70af-b479-e1eff800cfb5" xlink:to="loc_dei_Security12bTitle_019e0416-4f9a-7dfd-8d06-7e1b7cbbdc15" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_TradingSymbol_019e0416-4f9a-7098-8cc5-31e26a81c5b4" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_TradingSymbol"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019e0416-4f9a-70af-b479-e1eff800cfb5" xlink:to="loc_dei_TradingSymbol_019e0416-4f9a-7098-8cc5-31e26a81c5b4" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_SecurityExchangeName_019e0416-4f9a-7e6f-b3be-d6a307245f24" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_SecurityExchangeName"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019e0416-4f9a-70af-b479-e1eff800cfb5" xlink:to="loc_dei_SecurityExchangeName_019e0416-4f9a-7e6f-b3be-d6a307245f24" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityCurrentReportingStatus_019e0416-4f9a-77f8-bfea-9bc557294785" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityCurrentReportingStatus"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019e0416-4f9a-70af-b479-e1eff800cfb5" xlink:to="loc_dei_EntityCurrentReportingStatus_019e0416-4f9a-77f8-bfea-9bc557294785" xlink:type="arc" order="17"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityInteractiveDataCurrent_019e0416-4f9a-729b-92d8-9e736528b978" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityInteractiveDataCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019e0416-4f9a-70af-b479-e1eff800cfb5" xlink:to="loc_dei_EntityInteractiveDataCurrent_019e0416-4f9a-729b-92d8-9e736528b978" xlink:type="arc" order="18"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityFilerCategory_019e0416-4f9a-7cf3-b051-42afb6d01083" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityFilerCategory"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019e0416-4f9a-70af-b479-e1eff800cfb5" xlink:to="loc_dei_EntityFilerCategory_019e0416-4f9a-7cf3-b051-42afb6d01083" xlink:type="arc" order="19"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntitySmallBusiness_019e0416-4f9a-7d56-8640-ea269730d955" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntitySmallBusiness"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019e0416-4f9a-70af-b479-e1eff800cfb5" xlink:to="loc_dei_EntitySmallBusiness_019e0416-4f9a-7d56-8640-ea269730d955" xlink:type="arc" order="20"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityEmergingGrowthCompany_019e0416-4f9a-7131-8cd1-b0435fa92d2f" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityEmergingGrowthCompany"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019e0416-4f9a-70af-b479-e1eff800cfb5" xlink:to="loc_dei_EntityEmergingGrowthCompany_019e0416-4f9a-7131-8cd1-b0435fa92d2f" xlink:type="arc" order="21"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityShellCompany_019e0416-4f9a-770f-9304-d4d6a0dedddc" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityShellCompany"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019e0416-4f9a-70af-b479-e1eff800cfb5" xlink:to="loc_dei_EntityShellCompany_019e0416-4f9a-770f-9304-d4d6a0dedddc" xlink:type="arc" order="22"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityCommonStockSharesOutstanding_019e0416-4f9a-71fe-bda0-968ebb737e25" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityCommonStockSharesOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019e0416-4f9a-70af-b479-e1eff800cfb5" xlink:to="loc_dei_EntityCommonStockSharesOutstanding_019e0416-4f9a-71fe-bda0-968ebb737e25" xlink:type="arc" order="23"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityCentralIndexKey_019e0416-4f9a-7267-9fae-becd79e60a5a" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityCentralIndexKey"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019e0416-4f9a-70af-b479-e1eff800cfb5" xlink:to="loc_dei_EntityCentralIndexKey_019e0416-4f9a-7267-9fae-becd79e60a5a" xlink:type="arc" order="24"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_CurrentFiscalYearEndDate_019e0416-4f9a-77b4-af17-6177502e9b1d" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_CurrentFiscalYearEndDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019e0416-4f9a-70af-b479-e1eff800cfb5" xlink:to="loc_dei_CurrentFiscalYearEndDate_019e0416-4f9a-77b4-af17-6177502e9b1d" xlink:type="arc" order="25"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentFiscalYearFocus_019e0416-4f9a-755f-b317-1b7e0e8af282" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_DocumentFiscalYearFocus"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019e0416-4f9a-70af-b479-e1eff800cfb5" xlink:to="loc_dei_DocumentFiscalYearFocus_019e0416-4f9a-755f-b317-1b7e0e8af282" xlink:type="arc" order="26"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentFiscalPeriodFocus_019e0416-4f9a-7841-9a8d-ea82d9635209" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_DocumentFiscalPeriodFocus"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019e0416-4f9a-70af-b479-e1eff800cfb5" xlink:to="loc_dei_DocumentFiscalPeriodFocus_019e0416-4f9a-7841-9a8d-ea82d9635209" xlink:type="arc" order="27"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_AmendmentFlag_019e0416-4f9a-7295-b7f1-4aec8f889a25" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_AmendmentFlag"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019e0416-4f9a-70af-b479-e1eff800cfb5" xlink:to="loc_dei_AmendmentFlag_019e0416-4f9a-7295-b7f1-4aec8f889a25" xlink:type="arc" order="28"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.jobyaviation.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFSTOCKHOLDERSEQUITY" xlink:type="simple" xlink:href="joby-20260630.xsd#CONDENSEDCONSOLIDATEDSTATEMENTSOFSTOCKHOLDERSEQUITY"/>
  <link:definitionLink xlink:role="http://www.jobyaviation.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFSTOCKHOLDERSEQUITY" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_019e0416-4f9a-7988-808d-226112859e0c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_019e0416-4f9a-7e44-9d07-93662b9ac088" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_019e0416-4f9a-7988-808d-226112859e0c" xlink:to="loc_us-gaap_StatementTable_019e0416-4f9a-7e44-9d07-93662b9ac088" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_019e0416-4f9a-722d-88d9-eb45c87ec639" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementEquityComponentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_019e0416-4f9a-7e44-9d07-93662b9ac088" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_019e0416-4f9a-722d-88d9-eb45c87ec639" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_019e0416-4f9a-722d-88d9-eb45c87ec639_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_019e0416-4f9a-722d-88d9-eb45c87ec639" xlink:to="loc_us-gaap_EquityComponentDomain_019e0416-4f9a-722d-88d9-eb45c87ec639_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_019e0416-4f9a-74c1-b15c-032f92dd7256" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_019e0416-4f9a-722d-88d9-eb45c87ec639" xlink:to="loc_us-gaap_EquityComponentDomain_019e0416-4f9a-74c1-b15c-032f92dd7256" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockMember_019e0416-4f9a-70ec-b71f-093c0ec9caba" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_019e0416-4f9a-74c1-b15c-032f92dd7256" xlink:to="loc_us-gaap_CommonStockMember_019e0416-4f9a-70ec-b71f-093c0ec9caba" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdditionalPaidInCapitalMember_019e0416-4f9a-76fe-87be-e41f2bbdbe81" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AdditionalPaidInCapitalMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_019e0416-4f9a-74c1-b15c-032f92dd7256" xlink:to="loc_us-gaap_AdditionalPaidInCapitalMember_019e0416-4f9a-76fe-87be-e41f2bbdbe81" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetainedEarningsMember_019e0416-4f9a-75fa-bf5a-20227a518d32" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RetainedEarningsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_019e0416-4f9a-74c1-b15c-032f92dd7256" xlink:to="loc_us-gaap_RetainedEarningsMember_019e0416-4f9a-75fa-bf5a-20227a518d32" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_019e0416-4f9a-7268-9d12-1261f773ab74" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_019e0416-4f9a-74c1-b15c-032f92dd7256" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_019e0416-4f9a-7268-9d12-1261f773ab74" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsidiarySaleOfStockAxis_019e0416-4f9a-71b8-9935-4ef429531ddc" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SubsidiarySaleOfStockAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_019e0416-4f9a-7e44-9d07-93662b9ac088" xlink:to="loc_us-gaap_SubsidiarySaleOfStockAxis_019e0416-4f9a-71b8-9935-4ef429531ddc" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SaleOfStockNameOfTransactionDomain_019e0416-4f9a-71b8-9935-4ef429531ddc_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SaleOfStockNameOfTransactionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_SubsidiarySaleOfStockAxis_019e0416-4f9a-71b8-9935-4ef429531ddc" xlink:to="loc_us-gaap_SaleOfStockNameOfTransactionDomain_019e0416-4f9a-71b8-9935-4ef429531ddc_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SaleOfStockNameOfTransactionDomain_019e0416-4f9a-7a62-bd45-e488fc6fc40b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SaleOfStockNameOfTransactionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_SubsidiarySaleOfStockAxis_019e0416-4f9a-71b8-9935-4ef429531ddc" xlink:to="loc_us-gaap_SaleOfStockNameOfTransactionDomain_019e0416-4f9a-7a62-bd45-e488fc6fc40b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_joby_UnderwrittenPublicOfferingMember_019fa4ac-d264-71e1-bf7c-4b90e1184719" xlink:href="joby-20260630.xsd#joby_UnderwrittenPublicOfferingMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SaleOfStockNameOfTransactionDomain_019e0416-4f9a-7a62-bd45-e488fc6fc40b" xlink:to="loc_joby_UnderwrittenPublicOfferingMember_019fa4ac-d264-71e1-bf7c-4b90e1184719" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_joby_AtTheMarketPublicOfferingMember_019e0416-4f9a-7a70-af76-7e1d05c796db" xlink:href="joby-20260630.xsd#joby_AtTheMarketPublicOfferingMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SaleOfStockNameOfTransactionDomain_019e0416-4f9a-7a62-bd45-e488fc6fc40b" xlink:to="loc_joby_AtTheMarketPublicOfferingMember_019e0416-4f9a-7a70-af76-7e1d05c796db" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PrivatePlacementMember_019e0416-4f9a-7a93-9fc5-b8be5a0ca76a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PrivatePlacementMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SaleOfStockNameOfTransactionDomain_019e0416-4f9a-7a62-bd45-e488fc6fc40b" xlink:to="loc_us-gaap_PrivatePlacementMember_019e0416-4f9a-7a93-9fc5-b8be5a0ca76a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfWarrantOrRightAxis_019efd0b-fae6-7669-b8ed-dcc56da2ebaf" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ClassOfWarrantOrRightAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_019e0416-4f9a-7e44-9d07-93662b9ac088" xlink:to="loc_us-gaap_ClassOfWarrantOrRightAxis_019efd0b-fae6-7669-b8ed-dcc56da2ebaf" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfWarrantOrRightDomain_019efd0b-fae6-7669-b8ed-dcc56da2ebaf_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ClassOfWarrantOrRightDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ClassOfWarrantOrRightAxis_019efd0b-fae6-7669-b8ed-dcc56da2ebaf" xlink:to="loc_us-gaap_ClassOfWarrantOrRightDomain_019efd0b-fae6-7669-b8ed-dcc56da2ebaf_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfWarrantOrRightDomain_019efd0b-fae6-755b-9d5c-6ad4857b6be4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ClassOfWarrantOrRightDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ClassOfWarrantOrRightAxis_019efd0b-fae6-7669-b8ed-dcc56da2ebaf" xlink:to="loc_us-gaap_ClassOfWarrantOrRightDomain_019efd0b-fae6-755b-9d5c-6ad4857b6be4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_joby_PrivatePlacementWarrantsMember_019efd0c-2bfc-7587-b0b9-95a464fd7778" xlink:href="joby-20260630.xsd#joby_PrivatePlacementWarrantsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfWarrantOrRightDomain_019efd0b-fae6-755b-9d5c-6ad4857b6be4" xlink:to="loc_joby_PrivatePlacementWarrantsMember_019efd0c-2bfc-7587-b0b9-95a464fd7778" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_joby_PublicWarrantsMember_019efd0f-2fd4-708f-824a-f0dac6643c58" xlink:href="joby-20260630.xsd#joby_PublicWarrantsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfWarrantOrRightDomain_019efd0b-fae6-755b-9d5c-6ad4857b6be4" xlink:to="loc_joby_PublicWarrantsMember_019efd0f-2fd4-708f-824a-f0dac6643c58" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019e0416-4f9a-7c35-ab77-dbae69b1040f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncreaseDecreaseInStockholdersEquityRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e0416-4f9a-7988-808d-226112859e0c" xlink:to="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019e0416-4f9a-7c35-ab77-dbae69b1040f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesOutstanding_019e0416-4f9a-7394-b2d5-cb645be2899a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonStockSharesOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019e0416-4f9a-7c35-ab77-dbae69b1040f" xlink:to="loc_us-gaap_CommonStockSharesOutstanding_019e0416-4f9a-7394-b2d5-cb645be2899a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_019e0416-4f9a-7bf3-a603-86889dd8c75b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockholdersEquity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019e0416-4f9a-7c35-ab77-dbae69b1040f" xlink:to="loc_us-gaap_StockholdersEquity_019e0416-4f9a-7bf3-a603-86889dd8c75b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_019e0416-4f9a-7b2c-ae64-7a8b53a63a2d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019e0416-4f9a-7c35-ab77-dbae69b1040f" xlink:to="loc_us-gaap_NetIncomeLoss_019e0416-4f9a-7b2c-ae64-7a8b53a63a2d" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_019e0416-4f9a-7ea3-b6d6-acd5ad006704" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019e0416-4f9a-7c35-ab77-dbae69b1040f" xlink:to="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_019e0416-4f9a-7ea3-b6d6-acd5ad006704" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_019e0416-4f9a-7733-814a-4c09419d5336" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019e0416-4f9a-7c35-ab77-dbae69b1040f" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_019e0416-4f9a-7733-814a-4c09419d5336" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised_019e0416-4f9a-7c86-936c-4e751830d978" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019e0416-4f9a-7c35-ab77-dbae69b1040f" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised_019e0416-4f9a-7c86-936c-4e751830d978" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures_019e0416-4f9a-7dfe-a5f8-1c63f26a838a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019e0416-4f9a-7c35-ab77-dbae69b1040f" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures_019e0416-4f9a-7dfe-a5f8-1c63f26a838a" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesNewIssues_019e0416-4f9a-7c7d-bcc5-fa4712347eb7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockIssuedDuringPeriodSharesNewIssues"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019e0416-4f9a-7c35-ab77-dbae69b1040f" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesNewIssues_019e0416-4f9a-7c7d-bcc5-fa4712347eb7" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueNewIssues_019e0416-4f9a-7a25-b4f0-6dd673f88fe9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockIssuedDuringPeriodValueNewIssues"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019e0416-4f9a-7c35-ab77-dbae69b1040f" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueNewIssues_019e0416-4f9a-7a25-b4f0-6dd673f88fe9" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities_019efd0a-c994-7dd1-bb13-d0fcbd3f8ae5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019e0416-4f9a-7c35-ab77-dbae69b1040f" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities_019efd0a-c994-7dd1-bb13-d0fcbd3f8ae5" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueConversionOfConvertibleSecurities_019efd0c-81ff-705f-9071-6e0ba8ea4bc9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockIssuedDuringPeriodValueConversionOfConvertibleSecurities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019e0416-4f9a-7c35-ab77-dbae69b1040f" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueConversionOfConvertibleSecurities_019efd0c-81ff-705f-9071-6e0ba8ea4bc9" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_joby_AdjustmentsToAdditionalPaidInCapitalReclassificationOfWarrantLiability_019efd0d-cf7d-75f8-b0bc-cc85dec03f00" xlink:href="joby-20260630.xsd#joby_AdjustmentsToAdditionalPaidInCapitalReclassificationOfWarrantLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019e0416-4f9a-7c35-ab77-dbae69b1040f" xlink:to="loc_joby_AdjustmentsToAdditionalPaidInCapitalReclassificationOfWarrantLiability_019efd0d-cf7d-75f8-b0bc-cc85dec03f00" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_joby_AdjustmentsToAdditionalPaidInCapitalPurchaseOfCappedCallOptions_019efd0f-9d25-7f92-b46b-dd5ec284aca3" xlink:href="joby-20260630.xsd#joby_AdjustmentsToAdditionalPaidInCapitalPurchaseOfCappedCallOptions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019e0416-4f9a-7c35-ab77-dbae69b1040f" xlink:to="loc_joby_AdjustmentsToAdditionalPaidInCapitalPurchaseOfCappedCallOptions_019efd0f-9d25-7f92-b46b-dd5ec284aca3" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans_019e0416-4f9a-72c2-8975-7e196057e529" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019e0416-4f9a-7c35-ab77-dbae69b1040f" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans_019e0416-4f9a-72c2-8975-7e196057e529" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan_019e0416-4f9a-7469-96c8-821c204fa6c1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019e0416-4f9a-7c35-ab77-dbae69b1040f" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan_019e0416-4f9a-7469-96c8-821c204fa6c1" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_joby_VestingOfCommonStockIssuedInPrivatePlacementAndEarlyExercisedStockOptions_019e0416-4f9a-7bee-8c90-33f6bf6cfc1c" xlink:href="joby-20260630.xsd#joby_VestingOfCommonStockIssuedInPrivatePlacementAndEarlyExercisedStockOptions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019e0416-4f9a-7c35-ab77-dbae69b1040f" xlink:to="loc_joby_VestingOfCommonStockIssuedInPrivatePlacementAndEarlyExercisedStockOptions_019e0416-4f9a-7bee-8c90-33f6bf6cfc1c" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_019e0416-4f9a-78e1-9b7a-758e2bd1b89c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019e0416-4f9a-7c35-ab77-dbae69b1040f" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_019e0416-4f9a-78e1-9b7a-758e2bd1b89c" xlink:type="arc" order="17"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesOutstanding_019e0416-4f9a-737c-b188-e5cc27868c99" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonStockSharesOutstanding"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_019e0416-4f9a-715c-95d2-95ea067d3cd0" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockholdersEquity"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.jobyaviation.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFSTOCKHOLDERSEQUITYParenthetical" xlink:type="simple" xlink:href="joby-20260630.xsd#CONDENSEDCONSOLIDATEDSTATEMENTSOFSTOCKHOLDERSEQUITYParenthetical"/>
  <link:definitionLink xlink:role="http://www.jobyaviation.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFSTOCKHOLDERSEQUITYParenthetical" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_019e0416-4f9a-7635-bbc8-5436aca3cb60" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_019e0416-4f9a-703c-af91-58d6cfe9ffd2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_019e0416-4f9a-7635-bbc8-5436aca3cb60" xlink:to="loc_us-gaap_StatementTable_019e0416-4f9a-703c-af91-58d6cfe9ffd2" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsidiarySaleOfStockAxis_019e0416-4f9a-784c-a709-e7eac94dad7e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SubsidiarySaleOfStockAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_019e0416-4f9a-703c-af91-58d6cfe9ffd2" xlink:to="loc_us-gaap_SubsidiarySaleOfStockAxis_019e0416-4f9a-784c-a709-e7eac94dad7e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SaleOfStockNameOfTransactionDomain_019e0416-4f9a-784c-a709-e7eac94dad7e_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SaleOfStockNameOfTransactionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_SubsidiarySaleOfStockAxis_019e0416-4f9a-784c-a709-e7eac94dad7e" xlink:to="loc_us-gaap_SaleOfStockNameOfTransactionDomain_019e0416-4f9a-784c-a709-e7eac94dad7e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SaleOfStockNameOfTransactionDomain_019e0416-4f9a-7553-b7cd-a1aab11e93f4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SaleOfStockNameOfTransactionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_SubsidiarySaleOfStockAxis_019e0416-4f9a-784c-a709-e7eac94dad7e" xlink:to="loc_us-gaap_SaleOfStockNameOfTransactionDomain_019e0416-4f9a-7553-b7cd-a1aab11e93f4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_joby_AtTheMarketPublicOfferingMember_019e0416-4f9a-773c-a49d-820026b2f047" xlink:href="joby-20260630.xsd#joby_AtTheMarketPublicOfferingMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SaleOfStockNameOfTransactionDomain_019e0416-4f9a-7553-b7cd-a1aab11e93f4" xlink:to="loc_joby_AtTheMarketPublicOfferingMember_019e0416-4f9a-773c-a49d-820026b2f047" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PrivatePlacementMember_019e0416-4f9a-7497-8d02-ffa2adc529e9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PrivatePlacementMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SaleOfStockNameOfTransactionDomain_019e0416-4f9a-7553-b7cd-a1aab11e93f4" xlink:to="loc_us-gaap_PrivatePlacementMember_019e0416-4f9a-7497-8d02-ffa2adc529e9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsOfStockIssuanceCosts_019e0416-4f9a-7c90-83fc-e5f09dd350f3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PaymentsOfStockIssuanceCosts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e0416-4f9a-7635-bbc8-5436aca3cb60" xlink:to="loc_us-gaap_PaymentsOfStockIssuanceCosts_019e0416-4f9a-7c90-83fc-e5f09dd350f3" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.jobyaviation.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS" xlink:type="simple" xlink:href="joby-20260630.xsd#CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS"/>
  <link:definitionLink xlink:role="http://www.jobyaviation.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_019efd17-1ca5-7b21-b188-06bbdf32a2c3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_019efd17-1ca5-710a-81db-9a12aa94d001" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_019efd17-1ca5-7b21-b188-06bbdf32a2c3" xlink:to="loc_us-gaap_StatementTable_019efd17-1ca5-710a-81db-9a12aa94d001" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsidiarySaleOfStockAxis_019efd17-1ca5-7e2d-b141-ea78fe5cafca" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SubsidiarySaleOfStockAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_019efd17-1ca5-710a-81db-9a12aa94d001" xlink:to="loc_us-gaap_SubsidiarySaleOfStockAxis_019efd17-1ca5-7e2d-b141-ea78fe5cafca" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SaleOfStockNameOfTransactionDomain_019efd17-1ca5-7e2d-b141-ea78fe5cafca_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SaleOfStockNameOfTransactionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_SubsidiarySaleOfStockAxis_019efd17-1ca5-7e2d-b141-ea78fe5cafca" xlink:to="loc_us-gaap_SaleOfStockNameOfTransactionDomain_019efd17-1ca5-7e2d-b141-ea78fe5cafca_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SaleOfStockNameOfTransactionDomain_019efd17-1ca5-70ee-b399-745fa008c92e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SaleOfStockNameOfTransactionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_SubsidiarySaleOfStockAxis_019efd17-1ca5-7e2d-b141-ea78fe5cafca" xlink:to="loc_us-gaap_SaleOfStockNameOfTransactionDomain_019efd17-1ca5-70ee-b399-745fa008c92e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_joby_UnderwrittenPublicOfferingMember_019efd19-0a94-7697-81ef-3a5b427ad69a" xlink:href="joby-20260630.xsd#joby_UnderwrittenPublicOfferingMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SaleOfStockNameOfTransactionDomain_019efd17-1ca5-70ee-b399-745fa008c92e" xlink:to="loc_joby_UnderwrittenPublicOfferingMember_019efd19-0a94-7697-81ef-3a5b427ad69a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_joby_AtTheMarketPublicOfferingMember_019efd1d-a2c0-7c65-be2b-36239831a6b0" xlink:href="joby-20260630.xsd#joby_AtTheMarketPublicOfferingMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SaleOfStockNameOfTransactionDomain_019efd17-1ca5-70ee-b399-745fa008c92e" xlink:to="loc_joby_AtTheMarketPublicOfferingMember_019efd1d-a2c0-7c65-be2b-36239831a6b0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_019e0416-4f9a-7d94-9bad-16b553f9f870" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019efd17-1ca5-7b21-b188-06bbdf32a2c3" xlink:to="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_019e0416-4f9a-7d94-9bad-16b553f9f870" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_019e0416-4f9a-7b91-8370-e5bc1f28cf66" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_019e0416-4f9a-7d94-9bad-16b553f9f870" xlink:to="loc_us-gaap_NetIncomeLoss_019e0416-4f9a-7b91-8370-e5bc1f28cf66" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_019e0416-4f9a-7269-930c-cbd71b144d83" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_019e0416-4f9a-7d94-9bad-16b553f9f870" xlink:to="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_019e0416-4f9a-7269-930c-cbd71b144d83" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DepreciationDepletionAndAmortization_019e0416-4f9a-7b98-a1ca-7ece21812dea" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DepreciationDepletionAndAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_019e0416-4f9a-7269-930c-cbd71b144d83" xlink:to="loc_us-gaap_DepreciationDepletionAndAmortization_019e0416-4f9a-7b98-a1ca-7ece21812dea" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensation_019e0416-4f9a-7ca3-8cec-afda36262289" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_019e0416-4f9a-7269-930c-cbd71b144d83" xlink:to="loc_us-gaap_ShareBasedCompensation_019e0416-4f9a-7ca3-8cec-afda36262289" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_joby_GainLossFromChangeInTheFairValueOfWarrantsEarnoutSharesAndContingentConsideration_019e0416-4f9a-74d4-9c28-71f804747236" xlink:href="joby-20260630.xsd#joby_GainLossFromChangeInTheFairValueOfWarrantsEarnoutSharesAndContingentConsideration"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_019e0416-4f9a-7269-930c-cbd71b144d83" xlink:to="loc_joby_GainLossFromChangeInTheFairValueOfWarrantsEarnoutSharesAndContingentConsideration_019e0416-4f9a-74d4-9c28-71f804747236" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_joby_NonCashInterestExpenseAndAmortizationOfDebtDiscountAndIssuanceCosts_019efd14-464a-7a00-b08c-9327f60e24a3" xlink:href="joby-20260630.xsd#joby_NonCashInterestExpenseAndAmortizationOfDebtDiscountAndIssuanceCosts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_019e0416-4f9a-7269-930c-cbd71b144d83" xlink:to="loc_joby_NonCashInterestExpenseAndAmortizationOfDebtDiscountAndIssuanceCosts_019efd14-464a-7a00-b08c-9327f60e24a3" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_joby_GainLossOnCommonStockIssuedInPrivatePlacement_019e0416-4f9a-76db-b98e-4bc286e06ade" xlink:href="joby-20260630.xsd#joby_GainLossOnCommonStockIssuedInPrivatePlacement"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_019e0416-4f9a-7269-930c-cbd71b144d83" xlink:to="loc_joby_GainLossOnCommonStockIssuedInPrivatePlacement_019e0416-4f9a-76db-b98e-4bc286e06ade" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccretionAmortizationOfDiscountsAndPremiumsInvestments_019e0416-4f9a-79e4-a9f8-636e8ad0bd1c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AccretionAmortizationOfDiscountsAndPremiumsInvestments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_019e0416-4f9a-7269-930c-cbd71b144d83" xlink:to="loc_us-gaap_AccretionAmortizationOfDiscountsAndPremiumsInvestments_019e0416-4f9a-79e4-a9f8-636e8ad0bd1c" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_019e0416-4f9a-79db-ad76-2b0ef2f75be9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncreaseDecreaseInOperatingCapitalAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_019e0416-4f9a-7269-930c-cbd71b144d83" xlink:to="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_019e0416-4f9a-79db-ad76-2b0ef2f75be9" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInOtherCurrentAssets_019e0416-4f9a-744a-bce5-b3f306b1108f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncreaseDecreaseInOtherCurrentAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_019e0416-4f9a-79db-ad76-2b0ef2f75be9" xlink:to="loc_us-gaap_IncreaseDecreaseInOtherCurrentAssets_019e0416-4f9a-744a-bce5-b3f306b1108f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInOtherNoncurrentAssets_019e0416-4f9a-7984-9501-b995d383857d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncreaseDecreaseInOtherNoncurrentAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_019e0416-4f9a-79db-ad76-2b0ef2f75be9" xlink:to="loc_us-gaap_IncreaseDecreaseInOtherNoncurrentAssets_019e0416-4f9a-7984-9501-b995d383857d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities_019e0416-4f9a-73f8-9cd5-1e27c7f6ccfa" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_019e0416-4f9a-79db-ad76-2b0ef2f75be9" xlink:to="loc_us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities_019e0416-4f9a-73f8-9cd5-1e27c7f6ccfa" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInOtherNoncurrentLiabilities_019e0416-4f9a-7097-a0b9-e44bdf656032" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncreaseDecreaseInOtherNoncurrentLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_019e0416-4f9a-79db-ad76-2b0ef2f75be9" xlink:to="loc_us-gaap_IncreaseDecreaseInOtherNoncurrentLiabilities_019e0416-4f9a-7097-a0b9-e44bdf656032" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019e0416-4f9a-7f6a-8484-7281e2d8236b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_019e0416-4f9a-7d94-9bad-16b553f9f870" xlink:to="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019e0416-4f9a-7f6a-8484-7281e2d8236b" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_019e0416-4f9a-7731-be18-ba923fa3b789" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_019e0416-4f9a-7d94-9bad-16b553f9f870" xlink:to="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_019e0416-4f9a-7731-be18-ba923fa3b789" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquireMarketableSecurities_019e0416-4f9a-79b2-8739-3c2007f19ede" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PaymentsToAcquireMarketableSecurities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_019e0416-4f9a-7731-be18-ba923fa3b789" xlink:to="loc_us-gaap_PaymentsToAcquireMarketableSecurities_019e0416-4f9a-79b2-8739-3c2007f19ede" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromSaleOfAvailableForSaleSecuritiesDebt_019e0416-4f9a-7d69-acd8-f2efbb1f094d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ProceedsFromSaleOfAvailableForSaleSecuritiesDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_019e0416-4f9a-7731-be18-ba923fa3b789" xlink:to="loc_us-gaap_ProceedsFromSaleOfAvailableForSaleSecuritiesDebt_019e0416-4f9a-7d69-acd8-f2efbb1f094d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_019e0416-4f9a-7049-a697-5641dd1751f6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PaymentsToAcquirePropertyPlantAndEquipment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_019e0416-4f9a-7731-be18-ba923fa3b789" xlink:to="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_019e0416-4f9a-7049-a697-5641dd1751f6" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired_019efd15-ae9a-7f3b-b743-179a7583913d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_019e0416-4f9a-7731-be18-ba923fa3b789" xlink:to="loc_us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired_019efd15-ae9a-7f3b-b743-179a7583913d" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_019e0416-4f9a-763d-978b-b3eb382fb2e9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_019e0416-4f9a-7731-be18-ba923fa3b789" xlink:to="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_019e0416-4f9a-763d-978b-b3eb382fb2e9" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_019e0416-4f9a-75b2-958b-4035fcda7f5d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019efd17-1ca5-7b21-b188-06bbdf32a2c3" xlink:to="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_019e0416-4f9a-75b2-958b-4035fcda7f5d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromIssuanceOfCommonStock_019e0416-4f9a-77ac-a005-65361b58fde2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ProceedsFromIssuanceOfCommonStock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_019e0416-4f9a-75b2-958b-4035fcda7f5d" xlink:to="loc_us-gaap_ProceedsFromIssuanceOfCommonStock_019e0416-4f9a-77ac-a005-65361b58fde2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsOfStockIssuanceCosts_019e0416-4f9a-76ee-9941-8734facfaf46" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PaymentsOfStockIssuanceCosts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_019e0416-4f9a-75b2-958b-4035fcda7f5d" xlink:to="loc_us-gaap_PaymentsOfStockIssuanceCosts_019e0416-4f9a-76ee-9941-8734facfaf46" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromConvertibleDebt_019efd1b-e9a7-7984-81c1-664a339b3296" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ProceedsFromConvertibleDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_019e0416-4f9a-75b2-958b-4035fcda7f5d" xlink:to="loc_us-gaap_ProceedsFromConvertibleDebt_019efd1b-e9a7-7984-81c1-664a339b3296" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsOfDebtIssuanceCosts_019efd1c-578e-7a00-965f-97a652534f74" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PaymentsOfDebtIssuanceCosts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_019e0416-4f9a-75b2-958b-4035fcda7f5d" xlink:to="loc_us-gaap_PaymentsOfDebtIssuanceCosts_019efd1c-578e-7a00-965f-97a652534f74" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromIssuanceOfOtherLongTermDebt_019efd1c-c58b-7238-99fc-a93b40e7c4dc" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ProceedsFromIssuanceOfOtherLongTermDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_019e0416-4f9a-75b2-958b-4035fcda7f5d" xlink:to="loc_us-gaap_ProceedsFromIssuanceOfOtherLongTermDebt_019efd1c-c58b-7238-99fc-a93b40e7c4dc" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsForDerivativeInstrumentFinancingActivities_019efd1d-2048-7de5-9a98-2631f480d594" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PaymentsForDerivativeInstrumentFinancingActivities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_019e0416-4f9a-75b2-958b-4035fcda7f5d" xlink:to="loc_us-gaap_PaymentsForDerivativeInstrumentFinancingActivities_019efd1d-2048-7de5-9a98-2631f480d594" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromIssuanceOfPrivatePlacement_019e0416-4f9a-7b12-ab1c-6a9cd0fd0591" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ProceedsFromIssuanceOfPrivatePlacement"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_019e0416-4f9a-75b2-958b-4035fcda7f5d" xlink:to="loc_us-gaap_ProceedsFromIssuanceOfPrivatePlacement_019e0416-4f9a-7b12-ab1c-6a9cd0fd0591" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlans_019e0416-4f9a-7154-b6f1-859e34174762" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlans"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_019e0416-4f9a-75b2-958b-4035fcda7f5d" xlink:to="loc_us-gaap_ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlans_019e0416-4f9a-7154-b6f1-859e34174762" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_joby_ProceedsFromStockOptionsExercisedAndIssuanceOfWarrants_019e0416-4f9a-7c98-a3fd-47731118d95e" xlink:href="joby-20260630.xsd#joby_ProceedsFromStockOptionsExercisedAndIssuanceOfWarrants"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_019e0416-4f9a-75b2-958b-4035fcda7f5d" xlink:to="loc_joby_ProceedsFromStockOptionsExercisedAndIssuanceOfWarrants_019e0416-4f9a-7c98-a3fd-47731118d95e" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RepaymentsOfLongTermDebtAndCapitalSecurities_019e0416-4f9a-73ed-8a34-af605d7a5756" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RepaymentsOfLongTermDebtAndCapitalSecurities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_019e0416-4f9a-75b2-958b-4035fcda7f5d" xlink:to="loc_us-gaap_RepaymentsOfLongTermDebtAndCapitalSecurities_019e0416-4f9a-73ed-8a34-af605d7a5756" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_019e0416-4f9a-7b99-8c1b-e4180c38360d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_019e0416-4f9a-75b2-958b-4035fcda7f5d" xlink:to="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_019e0416-4f9a-7b99-8c1b-e4180c38360d" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_019e0416-4f9a-72b9-8604-6404039aeb53" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019efd17-1ca5-7b21-b188-06bbdf32a2c3" xlink:to="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_019e0416-4f9a-72b9-8604-6404039aeb53" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_019e0416-4f9a-7c8c-823e-214856e3bbba" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019efd17-1ca5-7b21-b188-06bbdf32a2c3" xlink:to="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_019e0416-4f9a-7c8c-823e-214856e3bbba" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_019e0416-4f9a-7c35-a212-8962d2424439" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsAbstract_019e0416-4f9a-7e50-a65b-f3c9cdbcb951" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019efd17-1ca5-7b21-b188-06bbdf32a2c3" xlink:to="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsAbstract_019e0416-4f9a-7e50-a65b-f3c9cdbcb951" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_019e0416-4f9a-74c5-bb83-232cb4556dd0" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsAbstract_019e0416-4f9a-7e50-a65b-f3c9cdbcb951" xlink:to="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_019e0416-4f9a-74c5-bb83-232cb4556dd0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedCash_019e0416-4f9a-7c89-8ef7-9db55488ad2c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RestrictedCash"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsAbstract_019e0416-4f9a-7e50-a65b-f3c9cdbcb951" xlink:to="loc_us-gaap_RestrictedCash_019e0416-4f9a-7c89-8ef7-9db55488ad2c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_019e0416-4f9a-74db-9dd6-306b749c74e7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NoncashInvestingAndFinancingItemsAbstract_019e0416-4f9a-7228-b924-0baed9b7e3fb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NoncashInvestingAndFinancingItemsAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019efd17-1ca5-7b21-b188-06bbdf32a2c3" xlink:to="loc_us-gaap_NoncashInvestingAndFinancingItemsAbstract_019e0416-4f9a-7228-b924-0baed9b7e3fb" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CapitalExpendituresIncurredButNotYetPaid_019e0416-4f9a-7578-9a4d-dcc9629a4b41" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CapitalExpendituresIncurredButNotYetPaid"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NoncashInvestingAndFinancingItemsAbstract_019e0416-4f9a-7228-b924-0baed9b7e3fb" xlink:to="loc_us-gaap_CapitalExpendituresIncurredButNotYetPaid_019e0416-4f9a-7578-9a4d-dcc9629a4b41" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CapitalLeaseObligationsIncurred_019e0416-4f9a-73b2-8fa3-6f36626de1b4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CapitalLeaseObligationsIncurred"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NoncashInvestingAndFinancingItemsAbstract_019e0416-4f9a-7228-b924-0baed9b7e3fb" xlink:to="loc_us-gaap_CapitalLeaseObligationsIncurred_019e0416-4f9a-73b2-8fa3-6f36626de1b4" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability_019e0416-4f9a-7e6a-8a33-e2a241691af9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NoncashInvestingAndFinancingItemsAbstract_019e0416-4f9a-7228-b924-0baed9b7e3fb" xlink:to="loc_us-gaap_RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability_019e0416-4f9a-7e6a-8a33-e2a241691af9" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.jobyaviation.com/role/SummaryofSignificantAccountingPoliciesNarrativeDetails" xlink:type="simple" xlink:href="joby-20260630.xsd#SummaryofSignificantAccountingPoliciesNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.jobyaviation.com/role/SummaryofSignificantAccountingPoliciesNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_joby_SummaryOfSignificantAccountingPoliciesLineItems_019e0416-5046-793d-8dee-af1588498a52" xlink:href="joby-20260630.xsd#joby_SummaryOfSignificantAccountingPoliciesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_joby_SummaryOfSignificantAccountingPoliciesTable_019e0416-5046-71da-a97d-41f1b9576cdf" xlink:href="joby-20260630.xsd#joby_SummaryOfSignificantAccountingPoliciesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_joby_SummaryOfSignificantAccountingPoliciesLineItems_019e0416-5046-793d-8dee-af1588498a52" xlink:to="loc_joby_SummaryOfSignificantAccountingPoliciesTable_019e0416-5046-71da-a97d-41f1b9576cdf" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_019f26f2-7ec8-7811-bf7d-dda8bfc31fac" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ConcentrationRiskByBenchmarkAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_joby_SummaryOfSignificantAccountingPoliciesTable_019e0416-5046-71da-a97d-41f1b9576cdf" xlink:to="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_019f26f2-7ec8-7811-bf7d-dda8bfc31fac" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskBenchmarkDomain_019f26f2-7ec8-7811-bf7d-dda8bfc31fac_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ConcentrationRiskBenchmarkDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_019f26f2-7ec8-7811-bf7d-dda8bfc31fac" xlink:to="loc_us-gaap_ConcentrationRiskBenchmarkDomain_019f26f2-7ec8-7811-bf7d-dda8bfc31fac_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskBenchmarkDomain_019f26f2-7ec8-75c5-a159-b734ca86d9c6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ConcentrationRiskBenchmarkDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_019f26f2-7ec8-7811-bf7d-dda8bfc31fac" xlink:to="loc_us-gaap_ConcentrationRiskBenchmarkDomain_019f26f2-7ec8-75c5-a159-b734ca86d9c6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SalesRevenueNetMember_019f8d01-07db-788d-a8d9-749d1f20cb56" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SalesRevenueNetMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskBenchmarkDomain_019f26f2-7ec8-75c5-a159-b734ca86d9c6" xlink:to="loc_us-gaap_SalesRevenueNetMember_019f8d01-07db-788d-a8d9-749d1f20cb56" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsReceivableMember_019f26f3-0bdf-7fac-8d9b-fb1e2c00b409" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AccountsReceivableMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskBenchmarkDomain_019f26f2-7ec8-75c5-a159-b734ca86d9c6" xlink:to="loc_us-gaap_AccountsReceivableMember_019f26f3-0bdf-7fac-8d9b-fb1e2c00b409" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskByTypeAxis_019f26f3-3e65-71df-b0fc-e56c89639c01" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ConcentrationRiskByTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_joby_SummaryOfSignificantAccountingPoliciesTable_019e0416-5046-71da-a97d-41f1b9576cdf" xlink:to="loc_us-gaap_ConcentrationRiskByTypeAxis_019f26f3-3e65-71df-b0fc-e56c89639c01" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskTypeDomain_019f26f3-3e65-71df-b0fc-e56c89639c01_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ConcentrationRiskTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConcentrationRiskByTypeAxis_019f26f3-3e65-71df-b0fc-e56c89639c01" xlink:to="loc_us-gaap_ConcentrationRiskTypeDomain_019f26f3-3e65-71df-b0fc-e56c89639c01_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskTypeDomain_019f26f3-3e65-7d4a-894c-3bed606c972d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ConcentrationRiskTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConcentrationRiskByTypeAxis_019f26f3-3e65-71df-b0fc-e56c89639c01" xlink:to="loc_us-gaap_ConcentrationRiskTypeDomain_019f26f3-3e65-7d4a-894c-3bed606c972d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CustomerConcentrationRiskMember_019f26f3-d561-7808-8e24-7857d4c2a40d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CustomerConcentrationRiskMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskTypeDomain_019f26f3-3e65-7d4a-894c-3bed606c972d" xlink:to="loc_us-gaap_CustomerConcentrationRiskMember_019f26f3-d561-7808-8e24-7857d4c2a40d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MajorCustomersAxis_019f26f4-09c4-7be5-83fc-05f6ec555bf1" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_MajorCustomersAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_joby_SummaryOfSignificantAccountingPoliciesTable_019e0416-5046-71da-a97d-41f1b9576cdf" xlink:to="loc_srt_MajorCustomersAxis_019f26f4-09c4-7be5-83fc-05f6ec555bf1" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_NameOfMajorCustomerDomain_019f26f4-09c4-7be5-83fc-05f6ec555bf1_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_NameOfMajorCustomerDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_MajorCustomersAxis_019f26f4-09c4-7be5-83fc-05f6ec555bf1" xlink:to="loc_srt_NameOfMajorCustomerDomain_019f26f4-09c4-7be5-83fc-05f6ec555bf1_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_NameOfMajorCustomerDomain_019f26f4-09c4-7f2b-9d9a-194ea718cca7" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_NameOfMajorCustomerDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_MajorCustomersAxis_019f26f4-09c4-7be5-83fc-05f6ec555bf1" xlink:to="loc_srt_NameOfMajorCustomerDomain_019f26f4-09c4-7f2b-9d9a-194ea718cca7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_joby_OneCustomerMember_019f26f4-2c4a-7959-8747-fe88786cc510" xlink:href="joby-20260630.xsd#joby_OneCustomerMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_NameOfMajorCustomerDomain_019f26f4-09c4-7f2b-9d9a-194ea718cca7" xlink:to="loc_joby_OneCustomerMember_019f26f4-2c4a-7959-8747-fe88786cc510" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskPercentage1_019f26f2-055e-72d3-8816-e12510bb7887" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ConcentrationRiskPercentage1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_joby_SummaryOfSignificantAccountingPoliciesLineItems_019e0416-5046-793d-8dee-af1588498a52" xlink:to="loc_us-gaap_ConcentrationRiskPercentage1_019f26f2-055e-72d3-8816-e12510bb7887" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.jobyaviation.com/role/FairValueMeasurementsScheduleofFairValueAssetsandLiabilitiesMeasuredonRecurringBasisDetails" xlink:type="simple" xlink:href="joby-20260630.xsd#FairValueMeasurementsScheduleofFairValueAssetsandLiabilitiesMeasuredonRecurringBasisDetails"/>
  <link:definitionLink xlink:role="http://www.jobyaviation.com/role/FairValueMeasurementsScheduleofFairValueAssetsandLiabilitiesMeasuredonRecurringBasisDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019e0416-5046-72be-a716-499d5845e5a4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019e0416-5046-78c9-8618-90517edabaa3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019e0416-5046-72be-a716-499d5845e5a4" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019e0416-5046-78c9-8618-90517edabaa3" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019e0416-5046-7ae6-8926-ba24a917e116" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019e0416-5046-78c9-8618-90517edabaa3" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019e0416-5046-7ae6-8926-ba24a917e116" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019e0416-5046-7ae6-8926-ba24a917e116_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019e0416-5046-7ae6-8926-ba24a917e116" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019e0416-5046-7ae6-8926-ba24a917e116_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019e0416-5046-7993-ba86-c0768c6d52e1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019e0416-5046-7ae6-8926-ba24a917e116" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019e0416-5046-7993-ba86-c0768c6d52e1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel1Member_019e0416-5046-70eb-9b3b-525fbf8bddc3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueInputsLevel1Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019e0416-5046-7993-ba86-c0768c6d52e1" xlink:to="loc_us-gaap_FairValueInputsLevel1Member_019e0416-5046-70eb-9b3b-525fbf8bddc3" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel2Member_019e0416-5046-7f27-820f-f9c5c5381653" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueInputsLevel2Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019e0416-5046-7993-ba86-c0768c6d52e1" xlink:to="loc_us-gaap_FairValueInputsLevel2Member_019e0416-5046-7f27-820f-f9c5c5381653" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel3Member_019e0416-5046-730a-81dc-0b85a5a578be" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueInputsLevel3Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019e0416-5046-7993-ba86-c0768c6d52e1" xlink:to="loc_us-gaap_FairValueInputsLevel3Member_019e0416-5046-730a-81dc-0b85a5a578be" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialInstrumentAxis_019e0416-5046-7e1a-8d4c-a32706bcf10c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FinancialInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019e0416-5046-78c9-8618-90517edabaa3" xlink:to="loc_us-gaap_FinancialInstrumentAxis_019e0416-5046-7e1a-8d4c-a32706bcf10c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e0416-5046-7e1a-8d4c-a32706bcf10c_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancialInstrumentAxis_019e0416-5046-7e1a-8d4c-a32706bcf10c" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e0416-5046-7e1a-8d4c-a32706bcf10c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e0416-5046-74e9-ad1f-a8cc4eee0700" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancialInstrumentAxis_019e0416-5046-7e1a-8d4c-a32706bcf10c" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e0416-5046-74e9-ad1f-a8cc4eee0700" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MoneyMarketFundsMember_019e0416-5046-7644-ad38-f0ecaf8abd0b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_MoneyMarketFundsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e0416-5046-74e9-ad1f-a8cc4eee0700" xlink:to="loc_us-gaap_MoneyMarketFundsMember_019e0416-5046-7644-ad38-f0ecaf8abd0b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestBearingDepositsMember_019e0416-5046-7512-b967-4aa29904f417" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InterestBearingDepositsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e0416-5046-74e9-ad1f-a8cc4eee0700" xlink:to="loc_us-gaap_InterestBearingDepositsMember_019e0416-5046-7512-b967-4aa29904f417" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetBackedSecuritiesMember_019e0416-5046-714a-9b1e-d1b510e3e9b8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AssetBackedSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e0416-5046-74e9-ad1f-a8cc4eee0700" xlink:to="loc_us-gaap_AssetBackedSecuritiesMember_019e0416-5046-714a-9b1e-d1b510e3e9b8" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_USGovernmentAgenciesDebtSecuritiesMember_019e0416-5046-7a49-a1c8-4f741e63a010" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_USGovernmentAgenciesDebtSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e0416-5046-74e9-ad1f-a8cc4eee0700" xlink:to="loc_us-gaap_USGovernmentAgenciesDebtSecuritiesMember_019e0416-5046-7a49-a1c8-4f741e63a010" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CorporateDebtSecuritiesMember_019e0416-5046-7951-a2a3-9aecb927a047" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CorporateDebtSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e0416-5046-74e9-ad1f-a8cc4eee0700" xlink:to="loc_us-gaap_CorporateDebtSecuritiesMember_019e0416-5046-7951-a2a3-9aecb927a047" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfWarrantOrRightAxis_019e0416-5046-7f12-865d-3d63a7acc013" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ClassOfWarrantOrRightAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019e0416-5046-78c9-8618-90517edabaa3" xlink:to="loc_us-gaap_ClassOfWarrantOrRightAxis_019e0416-5046-7f12-865d-3d63a7acc013" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfWarrantOrRightDomain_019e0416-5046-7f12-865d-3d63a7acc013_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ClassOfWarrantOrRightDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ClassOfWarrantOrRightAxis_019e0416-5046-7f12-865d-3d63a7acc013" xlink:to="loc_us-gaap_ClassOfWarrantOrRightDomain_019e0416-5046-7f12-865d-3d63a7acc013_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfWarrantOrRightDomain_019e0416-5046-7b1f-b02e-2201828539ae" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ClassOfWarrantOrRightDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ClassOfWarrantOrRightAxis_019e0416-5046-7f12-865d-3d63a7acc013" xlink:to="loc_us-gaap_ClassOfWarrantOrRightDomain_019e0416-5046-7b1f-b02e-2201828539ae" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_joby_CommonStockWarrantLiabilitiesPublicMember_019e0416-5046-7b09-b555-48edc91fb8e2" xlink:href="joby-20260630.xsd#joby_CommonStockWarrantLiabilitiesPublicMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfWarrantOrRightDomain_019e0416-5046-7b1f-b02e-2201828539ae" xlink:to="loc_joby_CommonStockWarrantLiabilitiesPublicMember_019e0416-5046-7b09-b555-48edc91fb8e2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_joby_CommonStockWarrantLiabilitiesDeltaMember_019e0416-5046-723f-af2f-a08ce3a503c2" xlink:href="joby-20260630.xsd#joby_CommonStockWarrantLiabilitiesDeltaMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfWarrantOrRightDomain_019e0416-5046-7b1f-b02e-2201828539ae" xlink:to="loc_joby_CommonStockWarrantLiabilitiesDeltaMember_019e0416-5046-723f-af2f-a08ce3a503c2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsAxis_019e6742-0d81-7ddd-a4ed-55a4744fd493" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CashAndCashEquivalentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019e0416-5046-78c9-8618-90517edabaa3" xlink:to="loc_us-gaap_CashAndCashEquivalentsAxis_019e6742-0d81-7ddd-a4ed-55a4744fd493" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_019e6742-0d81-7ddd-a4ed-55a4744fd493_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_CashAndCashEquivalentsAxis_019e6742-0d81-7ddd-a4ed-55a4744fd493" xlink:to="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_019e6742-0d81-7ddd-a4ed-55a4744fd493_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_019e6742-0d81-7bbe-bc41-2b6b507cfefc" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_CashAndCashEquivalentsAxis_019e6742-0d81-7ddd-a4ed-55a4744fd493" xlink:to="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_019e6742-0d81-7bbe-bc41-2b6b507cfefc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MoneyMarketFundsMember_019e6742-5c02-7078-8cdf-5f25d7e8dfea" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_MoneyMarketFundsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_019e6742-0d81-7bbe-bc41-2b6b507cfefc" xlink:to="loc_us-gaap_MoneyMarketFundsMember_019e6742-5c02-7078-8cdf-5f25d7e8dfea" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsFairValueDisclosureAbstract_019e0416-5046-7966-8f5a-41fb08152a9d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AssetsFairValueDisclosureAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019e0416-5046-72be-a716-499d5845e5a4" xlink:to="loc_us-gaap_AssetsFairValueDisclosureAbstract_019e0416-5046-7966-8f5a-41fb08152a9d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsFairValueDisclosure_019e0416-5046-7677-92de-8a72165f19c3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CashAndCashEquivalentsFairValueDisclosure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsFairValueDisclosureAbstract_019e0416-5046-7966-8f5a-41fb08152a9d" xlink:to="loc_us-gaap_CashAndCashEquivalentsFairValueDisclosure_019e0416-5046-7677-92de-8a72165f19c3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtSecurities_019e0416-5046-736f-be80-ac5ec3cf95bb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AvailableForSaleSecuritiesDebtSecurities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsFairValueDisclosureAbstract_019e0416-5046-7966-8f5a-41fb08152a9d" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtSecurities_019e0416-5046-736f-be80-ac5ec3cf95bb" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsFairValueDisclosure_019e0416-5046-7f8d-ba13-f6b6cc889b24" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AssetsFairValueDisclosure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsFairValueDisclosureAbstract_019e0416-5046-7966-8f5a-41fb08152a9d" xlink:to="loc_us-gaap_AssetsFairValueDisclosure_019e0416-5046-7f8d-ba13-f6b6cc889b24" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesFairValueDisclosureAbstract_019e0416-5046-7863-9b01-65f15a3dcb29" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LiabilitiesFairValueDisclosureAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019e0416-5046-72be-a716-499d5845e5a4" xlink:to="loc_us-gaap_LiabilitiesFairValueDisclosureAbstract_019e0416-5046-7863-9b01-65f15a3dcb29" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WarrantsAndRightsOutstanding_019e0416-5046-762a-bf3e-6e7c30e9fed7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_WarrantsAndRightsOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesFairValueDisclosureAbstract_019e0416-5046-7863-9b01-65f15a3dcb29" xlink:to="loc_us-gaap_WarrantsAndRightsOutstanding_019e0416-5046-762a-bf3e-6e7c30e9fed7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeLiabilities_019e0416-5046-7d17-878f-29dc44e02f96" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesFairValueDisclosureAbstract_019e0416-5046-7863-9b01-65f15a3dcb29" xlink:to="loc_us-gaap_DerivativeLiabilities_019e0416-5046-7d17-878f-29dc44e02f96" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationContingentConsiderationLiability_019eb504-a139-7eb2-a34d-5469e7f2fd5e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessCombinationContingentConsiderationLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesFairValueDisclosureAbstract_019e0416-5046-7863-9b01-65f15a3dcb29" xlink:to="loc_us-gaap_BusinessCombinationContingentConsiderationLiability_019eb504-a139-7eb2-a34d-5469e7f2fd5e" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesFairValueDisclosure_019e0416-5046-79c7-a614-0ae10904206c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LiabilitiesFairValueDisclosure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesFairValueDisclosureAbstract_019e0416-5046-7863-9b01-65f15a3dcb29" xlink:to="loc_us-gaap_LiabilitiesFairValueDisclosure_019e0416-5046-79c7-a614-0ae10904206c" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.jobyaviation.com/role/FairValueMeasurementsSummaryofDebtSecuritiesAvailableforsaleDetails" xlink:type="simple" xlink:href="joby-20260630.xsd#FairValueMeasurementsSummaryofDebtSecuritiesAvailableforsaleDetails"/>
  <link:definitionLink xlink:role="http://www.jobyaviation.com/role/FairValueMeasurementsSummaryofDebtSecuritiesAvailableforsaleDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_019e0416-5046-7da3-8029-e2b646b99d2e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019e0416-5046-7439-b223-7ff723bf9369" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_019e0416-5046-7da3-8029-e2b646b99d2e" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019e0416-5046-7439-b223-7ff723bf9369" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialInstrumentAxis_019e0416-5046-778e-a62f-0a110d904272" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FinancialInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019e0416-5046-7439-b223-7ff723bf9369" xlink:to="loc_us-gaap_FinancialInstrumentAxis_019e0416-5046-778e-a62f-0a110d904272" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e0416-5046-778e-a62f-0a110d904272_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancialInstrumentAxis_019e0416-5046-778e-a62f-0a110d904272" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e0416-5046-778e-a62f-0a110d904272_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e0416-5046-77f9-a462-c587c5643bc8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancialInstrumentAxis_019e0416-5046-778e-a62f-0a110d904272" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e0416-5046-77f9-a462-c587c5643bc8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestBearingDepositsMember_019e0416-5046-7fa2-abd2-4c4dbbc820a7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InterestBearingDepositsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e0416-5046-77f9-a462-c587c5643bc8" xlink:to="loc_us-gaap_InterestBearingDepositsMember_019e0416-5046-7fa2-abd2-4c4dbbc820a7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetBackedSecuritiesMember_019e0416-5046-7057-9925-ce108b58ee86" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AssetBackedSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e0416-5046-77f9-a462-c587c5643bc8" xlink:to="loc_us-gaap_AssetBackedSecuritiesMember_019e0416-5046-7057-9925-ce108b58ee86" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_USGovernmentAgenciesDebtSecuritiesMember_019e0416-5046-71e6-b6f7-33cdc9dd3cbc" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_USGovernmentAgenciesDebtSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e0416-5046-77f9-a462-c587c5643bc8" xlink:to="loc_us-gaap_USGovernmentAgenciesDebtSecuritiesMember_019e0416-5046-71e6-b6f7-33cdc9dd3cbc" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CorporateDebtSecuritiesMember_019e0416-5046-73d2-8c57-22e2e82c062a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CorporateDebtSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e0416-5046-77f9-a462-c587c5643bc8" xlink:to="loc_us-gaap_CorporateDebtSecuritiesMember_019e0416-5046-73d2-8c57-22e2e82c062a" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis_019e0416-5046-7b67-8e8a-81f1478931aa" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_019e0416-5046-7da3-8029-e2b646b99d2e" xlink:to="loc_us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis_019e0416-5046-7b67-8e8a-81f1478931aa" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleDebtSecuritiesGrossUnrealizedGain_019e0416-5046-7452-abce-63bee7dae541" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AvailableForSaleDebtSecuritiesGrossUnrealizedGain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_019e0416-5046-7da3-8029-e2b646b99d2e" xlink:to="loc_us-gaap_AvailableForSaleDebtSecuritiesGrossUnrealizedGain_019e0416-5046-7452-abce-63bee7dae541" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleDebtSecuritiesGrossUnrealizedLoss_019e6747-e302-7c1d-93cd-85d59ddf6a2c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AvailableForSaleDebtSecuritiesGrossUnrealizedLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_019e0416-5046-7da3-8029-e2b646b99d2e" xlink:to="loc_us-gaap_AvailableForSaleDebtSecuritiesGrossUnrealizedLoss_019e6747-e302-7c1d-93cd-85d59ddf6a2c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleAllowanceForCreditLoss_019e0416-5046-78ff-8d98-f4384a94ea80" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtSecuritiesAvailableForSaleAllowanceForCreditLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_019e0416-5046-7da3-8029-e2b646b99d2e" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleAllowanceForCreditLoss_019e0416-5046-78ff-8d98-f4384a94ea80" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtSecurities_019e0416-5046-74e4-a00c-030e8261b280" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AvailableForSaleSecuritiesDebtSecurities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_019e0416-5046-7da3-8029-e2b646b99d2e" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtSecurities_019e0416-5046-74e4-a00c-030e8261b280" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.jobyaviation.com/role/FairValueMeasurementsNarrativeDetails" xlink:type="simple" xlink:href="joby-20260630.xsd#FairValueMeasurementsNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.jobyaviation.com/role/FairValueMeasurementsNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019e0416-5046-74d8-91bd-ad49e69cd456" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019e0416-5046-74cd-8dbb-32418a3716fe" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019e0416-5046-74d8-91bd-ad49e69cd456" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019e0416-5046-74cd-8dbb-32418a3716fe" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019e0416-5046-7ce7-be2e-0cf27200bd85" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019e0416-5046-74cd-8dbb-32418a3716fe" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019e0416-5046-7ce7-be2e-0cf27200bd85" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019e0416-5046-7ce7-be2e-0cf27200bd85_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019e0416-5046-7ce7-be2e-0cf27200bd85" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019e0416-5046-7ce7-be2e-0cf27200bd85_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019e0416-5046-70e4-b195-7f540fb4cf14" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019e0416-5046-7ce7-be2e-0cf27200bd85" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019e0416-5046-70e4-b195-7f540fb4cf14" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel2Member_019e0416-5046-7a46-a417-5732ceebd806" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueInputsLevel2Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019e0416-5046-70e4-b195-7f540fb4cf14" xlink:to="loc_us-gaap_FairValueInputsLevel2Member_019e0416-5046-7a46-a417-5732ceebd806" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel1Member_019e0416-5046-7c63-adea-09ab3ccb9662" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueInputsLevel1Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019e0416-5046-70e4-b195-7f540fb4cf14" xlink:to="loc_us-gaap_FairValueInputsLevel1Member_019e0416-5046-7c63-adea-09ab3ccb9662" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel3Member_019e0416-5046-74b4-969e-481bc6384b18" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueInputsLevel3Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019e0416-5046-70e4-b195-7f540fb4cf14" xlink:to="loc_us-gaap_FairValueInputsLevel3Member_019e0416-5046-74b4-969e-481bc6384b18" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_joby_DebtSecuritiesAvailableForSaleMaturityWeightedAverageRemainingMaturity_019e0416-5046-7d46-a5bf-234a94c93f92" xlink:href="joby-20260630.xsd#joby_DebtSecuritiesAvailableForSaleMaturityWeightedAverageRemainingMaturity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019e0416-5046-74d8-91bd-ad49e69cd456" xlink:to="loc_joby_DebtSecuritiesAvailableForSaleMaturityWeightedAverageRemainingMaturity_019e0416-5046-7d46-a5bf-234a94c93f92" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityTransfersNet_019e0416-5046-71f2-a3a6-c182c6097b08" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityTransfersNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019e0416-5046-74d8-91bd-ad49e69cd456" xlink:to="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityTransfersNet_019e0416-5046-71f2-a3a6-c182c6097b08" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.jobyaviation.com/role/FairValueMeasurementsSummaryofFairValueLiabilitiesMeasuredonRecurringBasisUnobservableInputReconciliationDetails" xlink:type="simple" xlink:href="joby-20260630.xsd#FairValueMeasurementsSummaryofFairValueLiabilitiesMeasuredonRecurringBasisUnobservableInputReconciliationDetails"/>
  <link:definitionLink xlink:role="http://www.jobyaviation.com/role/FairValueMeasurementsSummaryofFairValueLiabilitiesMeasuredonRecurringBasisUnobservableInputReconciliationDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019e0416-5046-7b38-8e1c-a7bb474e4595" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019e0416-5046-7a79-8e84-1529714002f1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019e0416-5046-7b38-8e1c-a7bb474e4595" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019e0416-5046-7a79-8e84-1529714002f1" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfWarrantOrRightAxis_019e0416-5046-7bb1-ad31-9f273f96d670" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ClassOfWarrantOrRightAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019e0416-5046-7a79-8e84-1529714002f1" xlink:to="loc_us-gaap_ClassOfWarrantOrRightAxis_019e0416-5046-7bb1-ad31-9f273f96d670" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfWarrantOrRightDomain_019e0416-5046-7bb1-ad31-9f273f96d670_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ClassOfWarrantOrRightDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ClassOfWarrantOrRightAxis_019e0416-5046-7bb1-ad31-9f273f96d670" xlink:to="loc_us-gaap_ClassOfWarrantOrRightDomain_019e0416-5046-7bb1-ad31-9f273f96d670_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfWarrantOrRightDomain_019e0416-5046-7902-8635-056a4923392e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ClassOfWarrantOrRightDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ClassOfWarrantOrRightAxis_019e0416-5046-7bb1-ad31-9f273f96d670" xlink:to="loc_us-gaap_ClassOfWarrantOrRightDomain_019e0416-5046-7902-8635-056a4923392e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_joby_EarnOutSharesMember_019e0416-5046-72e6-b49d-52873c2dab9a" xlink:href="joby-20260630.xsd#joby_EarnOutSharesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfWarrantOrRightDomain_019e0416-5046-7902-8635-056a4923392e" xlink:to="loc_joby_EarnOutSharesMember_019e0416-5046-72e6-b49d-52873c2dab9a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_joby_DeltaWarrantsMember_019e0416-5046-74ef-8b2b-b8b7ec10622f" xlink:href="joby-20260630.xsd#joby_DeltaWarrantsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfWarrantOrRightDomain_019e0416-5046-7902-8635-056a4923392e" xlink:to="loc_joby_DeltaWarrantsMember_019e0416-5046-74ef-8b2b-b8b7ec10622f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_joby_EBITDAEarnoutLiabilityMember_019eb508-fb10-76d8-9bc4-0d8ff89d2d73" xlink:href="joby-20260630.xsd#joby_EBITDAEarnoutLiabilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfWarrantOrRightDomain_019e0416-5046-7902-8635-056a4923392e" xlink:to="loc_joby_EBITDAEarnoutLiabilityMember_019eb508-fb10-76d8-9bc4-0d8ff89d2d73" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_019e0416-5046-77be-bd24-351009d575f9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019e0416-5046-7b38-8e1c-a7bb474e4595" xlink:to="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_019e0416-5046-77be-bd24-351009d575f9" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue_019e0416-5046-77fd-ae93-35c3b426fa9a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_019e0416-5046-77be-bd24-351009d575f9" xlink:to="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue_019e0416-5046-77fd-ae93-35c3b426fa9a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityPurchasesSalesIssuancesSettlements_019f1745-63d8-7a1d-b19f-1267ce56f5c3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityPurchasesSalesIssuancesSettlements"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_019e0416-5046-77be-bd24-351009d575f9" xlink:to="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityPurchasesSalesIssuancesSettlements_019f1745-63d8-7a1d-b19f-1267ce56f5c3" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings_019e0416-5046-7efe-b3e4-0ca39042834c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_019e0416-5046-77be-bd24-351009d575f9" xlink:to="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings_019e0416-5046-7efe-b3e4-0ca39042834c" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue_019e0416-5046-7bb6-ac16-6ed7fba5a4f8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.jobyaviation.com/role/Acquisitions2025AcquisitionsDetails" xlink:type="simple" xlink:href="joby-20260630.xsd#Acquisitions2025AcquisitionsDetails"/>
  <link:definitionLink xlink:role="http://www.jobyaviation.com/role/Acquisitions2025AcquisitionsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionLineItems_019eb54c-09cc-724a-b989-a5bb2bc62a72" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessAcquisitionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_019eb54c-09cc-788d-ac9c-233f28f580cc" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019eb54c-09cc-724a-b989-a5bb2bc62a72" xlink:to="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_019eb54c-09cc-788d-ac9c-233f28f580cc" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_019eb54c-09cc-72ab-a6e4-e445af1cd6a4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessAcquisitionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_019eb54c-09cc-788d-ac9c-233f28f580cc" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_019eb54c-09cc-72ab-a6e4-e445af1cd6a4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019eb54c-09cc-72ab-a6e4-e445af1cd6a4_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_019eb54c-09cc-72ab-a6e4-e445af1cd6a4" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019eb54c-09cc-72ab-a6e4-e445af1cd6a4_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019eb54c-09cc-7756-98a9-915ec536aeb5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_019eb54c-09cc-72ab-a6e4-e445af1cd6a4" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019eb54c-09cc-7756-98a9-915ec536aeb5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_joby_BladeUrbanAirMobilityLLCAcquisitionMember_019eb54c-09cc-7797-ba77-23ff896260c3" xlink:href="joby-20260630.xsd#joby_BladeUrbanAirMobilityLLCAcquisitionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019eb54c-09cc-7756-98a9-915ec536aeb5" xlink:to="loc_joby_BladeUrbanAirMobilityLLCAcquisitionMember_019eb54c-09cc-7797-ba77-23ff896260c3" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_019eb54c-09cc-7552-8afe-c37f5b8808ed" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_019eb54c-09cc-788d-ac9c-233f28f580cc" xlink:to="loc_us-gaap_AwardTypeAxis_019eb54c-09cc-7552-8afe-c37f5b8808ed" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019eb54c-09cc-7552-8afe-c37f5b8808ed_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_019eb54c-09cc-7552-8afe-c37f5b8808ed" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019eb54c-09cc-7552-8afe-c37f5b8808ed_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019eb54c-09cc-7411-a142-28b15b798d80" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_019eb54c-09cc-7552-8afe-c37f5b8808ed" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019eb54c-09cc-7411-a142-28b15b798d80" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_joby_RestrictedStockUnitsRSUsBeforeBusinessCombinationMember_019eb54c-09cc-70c3-ae61-e5b6488521db" xlink:href="joby-20260630.xsd#joby_RestrictedStockUnitsRSUsBeforeBusinessCombinationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019eb54c-09cc-7411-a142-28b15b798d80" xlink:to="loc_joby_RestrictedStockUnitsRSUsBeforeBusinessCombinationMember_019eb54c-09cc-70c3-ae61-e5b6488521db" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_joby_RestrictedStockUnitsRSUsAfterBusinessCombinationMember_019eb54c-09cc-780b-9a01-24eb53b2fc92" xlink:href="joby-20260630.xsd#joby_RestrictedStockUnitsRSUsAfterBusinessCombinationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019eb54c-09cc-7411-a142-28b15b798d80" xlink:to="loc_joby_RestrictedStockUnitsRSUsAfterBusinessCombinationMember_019eb54c-09cc-780b-9a01-24eb53b2fc92" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019eb54c-09cc-782f-b8f3-d10c1015d8e3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_019eb54c-09cc-788d-ac9c-233f28f580cc" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019eb54c-09cc-782f-b8f3-d10c1015d8e3" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019eb54c-09cc-782f-b8f3-d10c1015d8e3_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019eb54c-09cc-782f-b8f3-d10c1015d8e3" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019eb54c-09cc-782f-b8f3-d10c1015d8e3_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019eb54c-09cc-7f42-92a9-abfbf7817dce" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019eb54c-09cc-782f-b8f3-d10c1015d8e3" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019eb54c-09cc-7f42-92a9-abfbf7817dce" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel3Member_019eb54c-09cc-7775-8c6c-c9e11fb6bad7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueInputsLevel3Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019eb54c-09cc-7f42-92a9-abfbf7817dce" xlink:to="loc_us-gaap_FairValueInputsLevel3Member_019eb54c-09cc-7775-8c6c-c9e11fb6bad7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputTypeAxis_019eb54c-09cc-76a0-b053-eb786b35e5b2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_MeasurementInputTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_019eb54c-09cc-788d-ac9c-233f28f580cc" xlink:to="loc_us-gaap_MeasurementInputTypeAxis_019eb54c-09cc-76a0-b053-eb786b35e5b2" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputTypeDomain_019eb54c-09cc-76a0-b053-eb786b35e5b2_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_MeasurementInputTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_MeasurementInputTypeAxis_019eb54c-09cc-76a0-b053-eb786b35e5b2" xlink:to="loc_us-gaap_MeasurementInputTypeDomain_019eb54c-09cc-76a0-b053-eb786b35e5b2_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputTypeDomain_019eb54c-09cc-7745-80fe-8a788e68b2ff" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_MeasurementInputTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_MeasurementInputTypeAxis_019eb54c-09cc-76a0-b053-eb786b35e5b2" xlink:to="loc_us-gaap_MeasurementInputTypeDomain_019eb54c-09cc-7745-80fe-8a788e68b2ff" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputDiscountRateMember_019eb54c-09cc-79e3-9601-d965ed6b9e24" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_MeasurementInputDiscountRateMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MeasurementInputTypeDomain_019eb54c-09cc-7745-80fe-8a788e68b2ff" xlink:to="loc_us-gaap_MeasurementInputDiscountRateMember_019eb54c-09cc-79e3-9601-d965ed6b9e24" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_019eb54c-67b7-719f-a8b9-42ec64940b8d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_019eb54c-09cc-788d-ac9c-233f28f580cc" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_019eb54c-67b7-719f-a8b9-42ec64940b8d" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019eb54c-67b7-719f-a8b9-42ec64940b8d_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_019eb54c-67b7-719f-a8b9-42ec64940b8d" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019eb54c-67b7-719f-a8b9-42ec64940b8d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019eb54c-67b7-7c5b-9485-fa69fcb4a7db" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_019eb54c-67b7-719f-a8b9-42ec64940b8d" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019eb54c-67b7-7c5b-9485-fa69fcb4a7db" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TradeNamesMember_019eb54c-67b7-7a90-b30b-082f3fc21d54" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TradeNamesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019eb54c-67b7-7c5b-9485-fa69fcb4a7db" xlink:to="loc_us-gaap_TradeNamesMember_019eb54c-67b7-7a90-b30b-082f3fc21d54" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired_019eb54c-09cc-7056-b0e0-0f3fb28d1972" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019eb54c-09cc-724a-b989-a5bb2bc62a72" xlink:to="loc_us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired_019eb54c-09cc-7056-b0e0-0f3fb28d1972" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationConsiderationTransferred1_019eb54c-09cc-7f22-b5b1-ef6e4e4958f7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessCombinationConsiderationTransferred1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019eb54c-09cc-724a-b989-a5bb2bc62a72" xlink:to="loc_us-gaap_BusinessCombinationConsiderationTransferred1_019eb54c-09cc-7f22-b5b1-ef6e4e4958f7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued_019eb54c-09cc-783b-9228-6bd1164dbfa8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019eb54c-09cc-724a-b989-a5bb2bc62a72" xlink:to="loc_us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued_019eb54c-09cc-783b-9228-6bd1164dbfa8" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionEquityInterestIssuedOrIssuableValueAssigned_019eb54c-09cc-7ea4-87eb-187ff952d74c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessAcquisitionEquityInterestIssuedOrIssuableValueAssigned"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019eb54c-09cc-724a-b989-a5bb2bc62a72" xlink:to="loc_us-gaap_BusinessAcquisitionEquityInterestIssuedOrIssuableValueAssigned_019eb54c-09cc-7ea4-87eb-187ff952d74c" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_joby_BusinessCombinationConsiderationTransferredEquityInterestPostCombinationCompensationExpense_019eb54c-09cc-7a8f-a82b-0d622342d2b3" xlink:href="joby-20260630.xsd#joby_BusinessCombinationConsiderationTransferredEquityInterestPostCombinationCompensationExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019eb54c-09cc-724a-b989-a5bb2bc62a72" xlink:to="loc_joby_BusinessCombinationConsiderationTransferredEquityInterestPostCombinationCompensationExpense_019eb54c-09cc-7a8f-a82b-0d622342d2b3" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationContingentConsiderationLiability_019eb54c-09cc-70cc-b271-1ff4edef09cd" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessCombinationContingentConsiderationLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019eb54c-09cc-724a-b989-a5bb2bc62a72" xlink:to="loc_us-gaap_BusinessCombinationContingentConsiderationLiability_019eb54c-09cc-70cc-b271-1ff4edef09cd" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_joby_BusinessCombinationConsiderationIndemnityHoldbackAmount_019eb54c-09cc-7672-98fb-69d5fc717988" xlink:href="joby-20260630.xsd#joby_BusinessCombinationConsiderationIndemnityHoldbackAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019eb54c-09cc-724a-b989-a5bb2bc62a72" xlink:to="loc_joby_BusinessCombinationConsiderationIndemnityHoldbackAmount_019eb54c-09cc-7672-98fb-69d5fc717988" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_joby_BusinessCombinationConsiderationTransferredShareBasedCompensationFairValue_019eb54c-09cc-723e-884d-e15e61d18f55" xlink:href="joby-20260630.xsd#joby_BusinessCombinationConsiderationTransferredShareBasedCompensationFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019eb54c-09cc-724a-b989-a5bb2bc62a72" xlink:to="loc_joby_BusinessCombinationConsiderationTransferredShareBasedCompensationFairValue_019eb54c-09cc-723e-884d-e15e61d18f55" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_joby_BusinessCombinationContingentConsiderationLiabilityRetentionEarnout_019eb54c-09cc-79a6-8224-e7866825ecb3" xlink:href="joby-20260630.xsd#joby_BusinessCombinationContingentConsiderationLiabilityRetentionEarnout"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019eb54c-09cc-724a-b989-a5bb2bc62a72" xlink:to="loc_joby_BusinessCombinationContingentConsiderationLiabilityRetentionEarnout_019eb54c-09cc-79a6-8224-e7866825ecb3" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_joby_BusinessCombinationContingentConsiderationLiabilityRetentionEarnoutPeriod_019eb54c-09cc-7d1e-878e-e7719543ccbb" xlink:href="joby-20260630.xsd#joby_BusinessCombinationContingentConsiderationLiabilityRetentionEarnoutPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019eb54c-09cc-724a-b989-a5bb2bc62a72" xlink:to="loc_joby_BusinessCombinationContingentConsiderationLiabilityRetentionEarnoutPeriod_019eb54c-09cc-7d1e-878e-e7719543ccbb" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_joby_RetentionEarnoutLiabilityCurrent_019eb54c-09cc-747b-80e3-2c1f7fe7716a" xlink:href="joby-20260630.xsd#joby_RetentionEarnoutLiabilityCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019eb54c-09cc-724a-b989-a5bb2bc62a72" xlink:to="loc_joby_RetentionEarnoutLiabilityCurrent_019eb54c-09cc-747b-80e3-2c1f7fe7716a" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_joby_CommercialAgreementExclusiveRightsToMedicalTransportServicePeriod_019eb54c-09cc-755d-9294-04e424329611" xlink:href="joby-20260630.xsd#joby_CommercialAgreementExclusiveRightsToMedicalTransportServicePeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019eb54c-09cc-724a-b989-a5bb2bc62a72" xlink:to="loc_joby_CommercialAgreementExclusiveRightsToMedicalTransportServicePeriod_019eb54c-09cc-755d-9294-04e424329611" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueHigh_019eb54c-09cc-7b68-89f8-91a4df491b9c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueHigh"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019eb54c-09cc-724a-b989-a5bb2bc62a72" xlink:to="loc_us-gaap_BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueHigh_019eb54c-09cc-7b68-89f8-91a4df491b9c" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationContingentConsiderationLiabilityMeasurementInput_019eb54c-09cc-7eff-9abd-db957a64884b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessCombinationContingentConsiderationLiabilityMeasurementInput"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019eb54c-09cc-724a-b989-a5bb2bc62a72" xlink:to="loc_us-gaap_BusinessCombinationContingentConsiderationLiabilityMeasurementInput_019eb54c-09cc-7eff-9abd-db957a64884b" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_joby_EBITDAEarnoutLiabilityCurrent_019eb54c-09cc-7f4e-afd9-1e63ffcbc0b9" xlink:href="joby-20260630.xsd#joby_EBITDAEarnoutLiabilityCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019eb54c-09cc-724a-b989-a5bb2bc62a72" xlink:to="loc_joby_EBITDAEarnoutLiabilityCurrent_019eb54c-09cc-7f4e-afd9-1e63ffcbc0b9" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_joby_BusinessCombinationConsiderationTransferredIndemnityHoldbackPeriod_019eb54c-09cc-7d04-8e96-5c53c96a47cc" xlink:href="joby-20260630.xsd#joby_BusinessCombinationConsiderationTransferredIndemnityHoldbackPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019eb54c-09cc-724a-b989-a5bb2bc62a72" xlink:to="loc_joby_BusinessCombinationConsiderationTransferredIndemnityHoldbackPeriod_019eb54c-09cc-7d04-8e96-5c53c96a47cc" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_joby_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustments_019eb54c-3879-7def-96e4-ab521915931c" xlink:href="joby-20260630.xsd#joby_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019eb54c-09cc-724a-b989-a5bb2bc62a72" xlink:to="loc_joby_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustments_019eb54c-3879-7def-96e4-ab521915931c" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_joby_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentWorkingCapital_019eb54c-3879-7f5b-8094-a2cae8529113" xlink:href="joby-20260630.xsd#joby_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentWorkingCapital"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019eb54c-09cc-724a-b989-a5bb2bc62a72" xlink:to="loc_joby_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentWorkingCapital_019eb54c-3879-7f5b-8094-a2cae8529113" xlink:type="arc" order="17"/>
    <link:loc xlink:type="locator" xlink:label="loc_joby_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentOther_019eb54c-3879-7a38-931f-c2ad5c63d903" xlink:href="joby-20260630.xsd#joby_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentOther"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019eb54c-09cc-724a-b989-a5bb2bc62a72" xlink:to="loc_joby_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentOther_019eb54c-3879-7a38-931f-c2ad5c63d903" xlink:type="arc" order="18"/>
    <link:loc xlink:type="locator" xlink:label="loc_joby_BusinessCombinationRecognizedAssetAcquiredIdentifiableIntangibleAssetFiniteLivedMeasurementInput_019eb54c-67b7-70ab-b417-dd79eb97bfcf" xlink:href="joby-20260630.xsd#joby_BusinessCombinationRecognizedAssetAcquiredIdentifiableIntangibleAssetFiniteLivedMeasurementInput"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019eb54c-09cc-724a-b989-a5bb2bc62a72" xlink:to="loc_joby_BusinessCombinationRecognizedAssetAcquiredIdentifiableIntangibleAssetFiniteLivedMeasurementInput_019eb54c-67b7-70ab-b417-dd79eb97bfcf" xlink:type="arc" order="19"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Goodwill_019eb54c-67b7-7db1-bcf6-c2f8b333bfec" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_Goodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019eb54c-09cc-724a-b989-a5bb2bc62a72" xlink:to="loc_us-gaap_Goodwill_019eb54c-67b7-7db1-bcf6-c2f8b333bfec" xlink:type="arc" order="20"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationAcquisitionRelatedCosts_019eb54c-67b7-78b1-a334-1904c48ae311" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessCombinationAcquisitionRelatedCosts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019eb54c-09cc-724a-b989-a5bb2bc62a72" xlink:to="loc_us-gaap_BusinessCombinationAcquisitionRelatedCosts_019eb54c-67b7-78b1-a334-1904c48ae311" xlink:type="arc" order="21"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.jobyaviation.com/role/AcquisitionsScheduleofAssetsAcquiredandLiabilitiesAssumedDetails" xlink:type="simple" xlink:href="joby-20260630.xsd#AcquisitionsScheduleofAssetsAcquiredandLiabilitiesAssumedDetails"/>
  <link:definitionLink xlink:role="http://www.jobyaviation.com/role/AcquisitionsScheduleofAssetsAcquiredandLiabilitiesAssumedDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionLineItems_019eb54e-4abc-7df8-9c7a-523922540fbb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessAcquisitionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_019eb54e-4abc-7dc1-93f6-1547e3099d18" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019eb54e-4abc-7df8-9c7a-523922540fbb" xlink:to="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_019eb54e-4abc-7dc1-93f6-1547e3099d18" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_019eb54e-4abc-714f-887d-7f8784c9cbd5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessAcquisitionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_019eb54e-4abc-7dc1-93f6-1547e3099d18" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_019eb54e-4abc-714f-887d-7f8784c9cbd5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019eb54e-4abc-714f-887d-7f8784c9cbd5_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_019eb54e-4abc-714f-887d-7f8784c9cbd5" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019eb54e-4abc-714f-887d-7f8784c9cbd5_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019eb54e-4abc-750c-acf6-3c0d018fea99" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_019eb54e-4abc-714f-887d-7f8784c9cbd5" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019eb54e-4abc-750c-acf6-3c0d018fea99" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_joby_BladeUrbanAirMobilityLLCAcquisitionMember_019eb54e-4abc-725d-aa89-2898972fc1f7" xlink:href="joby-20260630.xsd#joby_BladeUrbanAirMobilityLLCAcquisitionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019eb54e-4abc-750c-acf6-3c0d018fea99" xlink:to="loc_joby_BladeUrbanAirMobilityLLCAcquisitionMember_019eb54e-4abc-725d-aa89-2898972fc1f7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssetsAbstract_019eb551-8a45-7474-a0df-87c5fe52d0cf" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssetsAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019eb54e-4abc-7df8-9c7a-523922540fbb" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssetsAbstract_019eb551-8a45-7474-a0df-87c5fe52d0cf" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents_019eb54e-4abc-7535-9fdb-96b25d30ba89" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssetsAbstract_019eb551-8a45-7474-a0df-87c5fe52d0cf" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents_019eb54e-4abc-7535-9fdb-96b25d30ba89" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_joby_BusinessCombinationRecognizedAssetAcquiredRestrictedCash_019eb54e-4abc-77cb-9eeb-dcbcc3b5e2de" xlink:href="joby-20260630.xsd#joby_BusinessCombinationRecognizedAssetAcquiredRestrictedCash"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssetsAbstract_019eb551-8a45-7474-a0df-87c5fe52d0cf" xlink:to="loc_joby_BusinessCombinationRecognizedAssetAcquiredRestrictedCash_019eb54e-4abc-77cb-9eeb-dcbcc3b5e2de" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_joby_BusinessCombinationRecognizedAssetAcquiredAccountsAndOtherReceivables_019eb54e-4abc-756c-8215-ff9ca031c672" xlink:href="joby-20260630.xsd#joby_BusinessCombinationRecognizedAssetAcquiredAccountsAndOtherReceivables"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssetsAbstract_019eb551-8a45-7474-a0df-87c5fe52d0cf" xlink:to="loc_joby_BusinessCombinationRecognizedAssetAcquiredAccountsAndOtherReceivables_019eb54e-4abc-756c-8215-ff9ca031c672" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsPrepaidExpenseAndOtherAssets_019eb54e-4abc-7dcd-b7e8-774e8512c850" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsPrepaidExpenseAndOtherAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssetsAbstract_019eb551-8a45-7474-a0df-87c5fe52d0cf" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsPrepaidExpenseAndOtherAssets_019eb54e-4abc-7dcd-b7e8-774e8512c850" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment_019eb54e-4abc-7ce2-80c3-53e2e9cd8e6e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssetsAbstract_019eb551-8a45-7474-a0df-87c5fe52d0cf" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment_019eb54e-4abc-7ce2-80c3-53e2e9cd8e6e" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_joby_BusinessCombinationRecognizedAssetAcquiredOperatingLeaseRightOfUseAssets_019eb54e-4abc-799a-8edd-0b7cc8dd7e02" xlink:href="joby-20260630.xsd#joby_BusinessCombinationRecognizedAssetAcquiredOperatingLeaseRightOfUseAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssetsAbstract_019eb551-8a45-7474-a0df-87c5fe52d0cf" xlink:to="loc_joby_BusinessCombinationRecognizedAssetAcquiredOperatingLeaseRightOfUseAssets_019eb54e-4abc-799a-8edd-0b7cc8dd7e02" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles_019eb54e-4abc-78cc-8765-89a986526c80" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssetsAbstract_019eb551-8a45-7474-a0df-87c5fe52d0cf" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles_019eb54e-4abc-78cc-8765-89a986526c80" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherNoncurrentAssets_019eb54e-4abc-779d-958b-c0f3306abf44" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherNoncurrentAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssetsAbstract_019eb551-8a45-7474-a0df-87c5fe52d0cf" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherNoncurrentAssets_019eb54e-4abc-779d-958b-c0f3306abf44" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Goodwill_019eb54e-4abc-7aab-8b0f-fb7401317c60" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_Goodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssetsAbstract_019eb551-8a45-7474-a0df-87c5fe52d0cf" xlink:to="loc_us-gaap_Goodwill_019eb54e-4abc-7aab-8b0f-fb7401317c60" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_joby_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssetsAcquiredIncludingGoodwill_019eb54e-4abc-7ba6-85e1-38551e1cdde5" xlink:href="joby-20260630.xsd#joby_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssetsAcquiredIncludingGoodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssetsAbstract_019eb551-8a45-7474-a0df-87c5fe52d0cf" xlink:to="loc_joby_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssetsAcquiredIncludingGoodwill_019eb54e-4abc-7ba6-85e1-38551e1cdde5" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilitiesAbstract_019eb551-d5ec-741a-b3a8-c6ffbac5f139" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilitiesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019eb54e-4abc-7df8-9c7a-523922540fbb" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilitiesAbstract_019eb551-d5ec-741a-b3a8-c6ffbac5f139" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesAccountsPayable_019eb54e-4abc-7a94-88b5-23a7ab73d314" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesAccountsPayable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilitiesAbstract_019eb551-d5ec-741a-b3a8-c6ffbac5f139" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesAccountsPayable_019eb54e-4abc-7a94-88b5-23a7ab73d314" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_joby_BusinessCombinationRecognizedLiabilityAssumedAccruedExpensesAndOtherLiabilityCurrent_019eb54e-4abc-77b1-ae28-e1171b83ca27" xlink:href="joby-20260630.xsd#joby_BusinessCombinationRecognizedLiabilityAssumedAccruedExpensesAndOtherLiabilityCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilitiesAbstract_019eb551-d5ec-741a-b3a8-c6ffbac5f139" xlink:to="loc_joby_BusinessCombinationRecognizedLiabilityAssumedAccruedExpensesAndOtherLiabilityCurrent_019eb54e-4abc-77b1-ae28-e1171b83ca27" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_joby_BusinessCombinationRecognizedLiabilityAssumedOperatingLeaseLiabilityCurrent_019eb54e-4abc-7a70-bc5a-926b4f33aeab" xlink:href="joby-20260630.xsd#joby_BusinessCombinationRecognizedLiabilityAssumedOperatingLeaseLiabilityCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilitiesAbstract_019eb551-d5ec-741a-b3a8-c6ffbac5f139" xlink:to="loc_joby_BusinessCombinationRecognizedLiabilityAssumedOperatingLeaseLiabilityCurrent_019eb54e-4abc-7a70-bc5a-926b4f33aeab" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_joby_BusinessCombinationRecognizedLiabilityAssumedOperatingLeaseLiabilityNoncurrent_019eb54e-4abc-7c8e-91bb-6cd42cd5a22a" xlink:href="joby-20260630.xsd#joby_BusinessCombinationRecognizedLiabilityAssumedOperatingLeaseLiabilityNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilitiesAbstract_019eb551-d5ec-741a-b3a8-c6ffbac5f139" xlink:to="loc_joby_BusinessCombinationRecognizedLiabilityAssumedOperatingLeaseLiabilityNoncurrent_019eb54e-4abc-7c8e-91bb-6cd42cd5a22a" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesOther_019eb54e-4abc-77db-b395-3d3375a63739" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesOther"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilitiesAbstract_019eb551-d5ec-741a-b3a8-c6ffbac5f139" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesOther_019eb54e-4abc-77db-b395-3d3375a63739" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities_019eb54e-4abc-72a7-b54c-6a57a25d2121" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilitiesAbstract_019eb551-d5ec-741a-b3a8-c6ffbac5f139" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities_019eb54e-4abc-72a7-b54c-6a57a25d2121" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet_019eb54e-4abc-7cd8-8440-e9b1155d472b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019eb54e-4abc-7df8-9c7a-523922540fbb" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet_019eb54e-4abc-7cd8-8440-e9b1155d472b" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.jobyaviation.com/role/AcquisitionsScheduleOfIntangibleAssetsAcquiredDetails" xlink:type="simple" xlink:href="joby-20260630.xsd#AcquisitionsScheduleOfIntangibleAssetsAcquiredDetails"/>
  <link:definitionLink xlink:role="http://www.jobyaviation.com/role/AcquisitionsScheduleOfIntangibleAssetsAcquiredDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionLineItems_019eb552-bfb5-7b4c-be0a-681a0147583d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessAcquisitionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_019eb552-bfb5-7879-b302-d37e2ee889a8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019eb552-bfb5-7b4c-be0a-681a0147583d" xlink:to="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_019eb552-bfb5-7879-b302-d37e2ee889a8" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_019eb552-bfb5-7aa8-baeb-4bbd10cc5ccc" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessAcquisitionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_019eb552-bfb5-7879-b302-d37e2ee889a8" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_019eb552-bfb5-7aa8-baeb-4bbd10cc5ccc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019eb552-bfb5-7aa8-baeb-4bbd10cc5ccc_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_019eb552-bfb5-7aa8-baeb-4bbd10cc5ccc" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019eb552-bfb5-7aa8-baeb-4bbd10cc5ccc_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019eb552-bfb5-79af-8e3c-656d6aed44a5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_019eb552-bfb5-7aa8-baeb-4bbd10cc5ccc" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019eb552-bfb5-79af-8e3c-656d6aed44a5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_joby_BladeUrbanAirMobilityLLCAcquisitionMember_019eb552-bfb5-716b-94a9-f8e68f826742" xlink:href="joby-20260630.xsd#joby_BladeUrbanAirMobilityLLCAcquisitionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019eb552-bfb5-79af-8e3c-656d6aed44a5" xlink:to="loc_joby_BladeUrbanAirMobilityLLCAcquisitionMember_019eb552-bfb5-716b-94a9-f8e68f826742" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_019eb552-bfb5-72ad-a077-846f28ae12e0" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_019eb552-bfb5-7879-b302-d37e2ee889a8" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_019eb552-bfb5-72ad-a077-846f28ae12e0" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019eb552-bfb5-72ad-a077-846f28ae12e0_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_019eb552-bfb5-72ad-a077-846f28ae12e0" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019eb552-bfb5-72ad-a077-846f28ae12e0_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019eb552-bfb5-7051-8866-2844058083cb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_019eb552-bfb5-72ad-a077-846f28ae12e0" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019eb552-bfb5-7051-8866-2844058083cb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_joby_ExclusiveRightsToAirTransportationServicesMember_019eb552-bfb5-7de9-93a4-e0af8c613670" xlink:href="joby-20260630.xsd#joby_ExclusiveRightsToAirTransportationServicesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019eb552-bfb5-7051-8866-2844058083cb" xlink:to="loc_joby_ExclusiveRightsToAirTransportationServicesMember_019eb552-bfb5-7de9-93a4-e0af8c613670" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DevelopedTechnologyRightsMember_019eb552-bfb5-7bcc-8370-cbc0e5194b53" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DevelopedTechnologyRightsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019eb552-bfb5-7051-8866-2844058083cb" xlink:to="loc_us-gaap_DevelopedTechnologyRightsMember_019eb552-bfb5-7bcc-8370-cbc0e5194b53" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CustomerRelationshipsMember_019eb552-bfb5-726c-a517-7e92240c538d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CustomerRelationshipsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019eb552-bfb5-7051-8866-2844058083cb" xlink:to="loc_us-gaap_CustomerRelationshipsMember_019eb552-bfb5-726c-a517-7e92240c538d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TradeNamesMember_019eb552-bfb5-7f7b-8d38-2338a255aa26" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TradeNamesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019eb552-bfb5-7051-8866-2844058083cb" xlink:to="loc_us-gaap_TradeNamesMember_019eb552-bfb5-7f7b-8d38-2338a255aa26" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetUsefulLife_019eb552-bfb5-7f40-a2c7-4ca2fb6132ef" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FiniteLivedIntangibleAssetUsefulLife"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019eb552-bfb5-7b4c-be0a-681a0147583d" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetUsefulLife_019eb552-bfb5-7f40-a2c7-4ca2fb6132ef" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles_019eb552-bfb5-7dfd-ab23-a2d95f74fa45" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019eb552-bfb5-7b4c-be0a-681a0147583d" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles_019eb552-bfb5-7dfd-ab23-a2d95f74fa45" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.jobyaviation.com/role/AcquisitionsAssetAcquisitionDetails" xlink:type="simple" xlink:href="joby-20260630.xsd#AcquisitionsAssetAcquisitionDetails"/>
  <link:definitionLink xlink:role="http://www.jobyaviation.com/role/AcquisitionsAssetAcquisitionDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetAcquisitionLineItems_019eb553-f35d-78c3-85b8-454137850311" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AssetAcquisitionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetAcquisitionTable_019eb553-f35d-7fee-b6a3-a3889bd999ea" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AssetAcquisitionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_AssetAcquisitionLineItems_019eb553-f35d-78c3-85b8-454137850311" xlink:to="loc_us-gaap_AssetAcquisitionTable_019eb553-f35d-7fee-b6a3-a3889bd999ea" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetAcquisitionAxis_019eb553-f35d-799c-bcc1-dca51dcb4b07" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AssetAcquisitionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_AssetAcquisitionTable_019eb553-f35d-7fee-b6a3-a3889bd999ea" xlink:to="loc_us-gaap_AssetAcquisitionAxis_019eb553-f35d-799c-bcc1-dca51dcb4b07" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetAcquisitionDomain_019eb553-f35d-799c-bcc1-dca51dcb4b07_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AssetAcquisitionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AssetAcquisitionAxis_019eb553-f35d-799c-bcc1-dca51dcb4b07" xlink:to="loc_us-gaap_AssetAcquisitionDomain_019eb553-f35d-799c-bcc1-dca51dcb4b07_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetAcquisitionDomain_019eb553-f35d-7d47-b593-6129fcca4fa6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AssetAcquisitionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AssetAcquisitionAxis_019eb553-f35d-799c-bcc1-dca51dcb4b07" xlink:to="loc_us-gaap_AssetAcquisitionDomain_019eb553-f35d-7d47-b593-6129fcca4fa6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_joby_SpecialPurposeEntityAcquisitionMember_019eb553-f35d-7993-95a6-12b9e671ad5d" xlink:href="joby-20260630.xsd#joby_SpecialPurposeEntityAcquisitionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetAcquisitionDomain_019eb553-f35d-7d47-b593-6129fcca4fa6" xlink:to="loc_joby_SpecialPurposeEntityAcquisitionMember_019eb553-f35d-7993-95a6-12b9e671ad5d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_019eb553-f35d-7ed8-a484-f3ae70a790f3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PropertyPlantAndEquipmentByTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_AssetAcquisitionTable_019eb553-f35d-7fee-b6a3-a3889bd999ea" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_019eb553-f35d-7ed8-a484-f3ae70a790f3" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019eb553-f35d-7ed8-a484-f3ae70a790f3_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_019eb553-f35d-7ed8-a484-f3ae70a790f3" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019eb553-f35d-7ed8-a484-f3ae70a790f3_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019eb553-f35d-7bbb-865a-5c33a2fe0a8d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_019eb553-f35d-7ed8-a484-f3ae70a790f3" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019eb553-f35d-7bbb-865a-5c33a2fe0a8d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LandMember_019eb553-f35d-7232-aba4-b94396f914eb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LandMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019eb553-f35d-7bbb-865a-5c33a2fe0a8d" xlink:to="loc_us-gaap_LandMember_019eb553-f35d-7232-aba4-b94396f914eb" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BuildingMember_019eb553-f35d-714d-86a1-e555553f7790" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BuildingMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019eb553-f35d-7bbb-865a-5c33a2fe0a8d" xlink:to="loc_us-gaap_BuildingMember_019eb553-f35d-714d-86a1-e555553f7790" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_joby_AssetAcquisitionPercentageofSharesAcquired_019eb553-f35d-79ba-8c47-c38c8e0a2e85" xlink:href="joby-20260630.xsd#joby_AssetAcquisitionPercentageofSharesAcquired"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetAcquisitionLineItems_019eb553-f35d-78c3-85b8-454137850311" xlink:to="loc_joby_AssetAcquisitionPercentageofSharesAcquired_019eb553-f35d-79ba-8c47-c38c8e0a2e85" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquireProductiveAssets_019eb553-f35d-752b-9db4-043f9d2ca365" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PaymentsToAcquireProductiveAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetAcquisitionLineItems_019eb553-f35d-78c3-85b8-454137850311" xlink:to="loc_us-gaap_PaymentsToAcquireProductiveAssets_019eb553-f35d-752b-9db4-043f9d2ca365" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentAdditions_019eb553-f35d-7b9d-a777-2905c1f93ac6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PropertyPlantAndEquipmentAdditions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetAcquisitionLineItems_019eb553-f35d-78c3-85b8-454137850311" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentAdditions_019eb553-f35d-7b9d-a777-2905c1f93ac6" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IndefinitelivedIntangibleAssetsAcquired_019eb553-f35d-7b34-9b05-59d61d4998d0" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IndefinitelivedIntangibleAssetsAcquired"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetAcquisitionLineItems_019eb553-f35d-78c3-85b8-454137850311" xlink:to="loc_us-gaap_IndefinitelivedIntangibleAssetsAcquired_019eb553-f35d-7b34-9b05-59d61d4998d0" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.jobyaviation.com/role/BalanceSheetComponentsSummaryofPropertyPlantandEquipmentDetails" xlink:type="simple" xlink:href="joby-20260630.xsd#BalanceSheetComponentsSummaryofPropertyPlantandEquipmentDetails"/>
  <link:definitionLink xlink:role="http://www.jobyaviation.com/role/BalanceSheetComponentsSummaryofPropertyPlantandEquipmentDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019e0416-5046-7437-8ab3-366f3c74d687" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PropertyPlantAndEquipmentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_019e0416-5046-7db3-bc4e-3b9b4e7b4b2a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfPropertyPlantAndEquipmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019e0416-5046-7437-8ab3-366f3c74d687" xlink:to="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_019e0416-5046-7db3-bc4e-3b9b4e7b4b2a" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_019e0416-5046-7c43-a62a-daff6b8cf5aa" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PropertyPlantAndEquipmentByTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_019e0416-5046-7db3-bc4e-3b9b4e7b4b2a" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_019e0416-5046-7c43-a62a-daff6b8cf5aa" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019e0416-5046-7c43-a62a-daff6b8cf5aa_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_019e0416-5046-7c43-a62a-daff6b8cf5aa" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019e0416-5046-7c43-a62a-daff6b8cf5aa_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019e0416-5046-7a70-9c3e-d5d474ed6d31" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_019e0416-5046-7c43-a62a-daff6b8cf5aa" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019e0416-5046-7a70-9c3e-d5d474ed6d31" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquipmentMember_019e0416-5046-795d-b933-4aa4870b1241" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EquipmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019e0416-5046-7a70-9c3e-d5d474ed6d31" xlink:to="loc_us-gaap_EquipmentMember_019e0416-5046-795d-b933-4aa4870b1241" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BuildingMember_019e0416-5046-7566-8c8b-a8b64511a7ba" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BuildingMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019e0416-5046-7a70-9c3e-d5d474ed6d31" xlink:to="loc_us-gaap_BuildingMember_019e0416-5046-7566-8c8b-a8b64511a7ba" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ToolsDiesAndMoldsMember_019e0416-5046-70cd-9dfb-b33e69180735" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ToolsDiesAndMoldsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019e0416-5046-7a70-9c3e-d5d474ed6d31" xlink:to="loc_us-gaap_ToolsDiesAndMoldsMember_019e0416-5046-70cd-9dfb-b33e69180735" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LeaseholdImprovementsMember_019e0416-5046-719c-a76c-4214c7c0e685" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LeaseholdImprovementsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019e0416-5046-7a70-9c3e-d5d474ed6d31" xlink:to="loc_us-gaap_LeaseholdImprovementsMember_019e0416-5046-719c-a76c-4214c7c0e685" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SoftwareAndSoftwareDevelopmentCostsMember_019fb8a6-428f-7961-a4cf-6c2320c71f61" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SoftwareAndSoftwareDevelopmentCostsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019e0416-5046-7a70-9c3e-d5d474ed6d31" xlink:to="loc_us-gaap_SoftwareAndSoftwareDevelopmentCostsMember_019fb8a6-428f-7961-a4cf-6c2320c71f61" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LandMember_019e0416-5046-7d3d-a856-1c63769e3d4f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LandMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019e0416-5046-7a70-9c3e-d5d474ed6d31" xlink:to="loc_us-gaap_LandMember_019e0416-5046-7d3d-a856-1c63769e3d4f" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransportationEquipmentMember_019e0416-5046-731a-9a46-7c5e531923bf" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TransportationEquipmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019e0416-5046-7a70-9c3e-d5d474ed6d31" xlink:to="loc_us-gaap_TransportationEquipmentMember_019e0416-5046-731a-9a46-7c5e531923bf" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FurnitureAndFixturesMember_019e0416-5046-768e-8ad4-1543309f6361" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FurnitureAndFixturesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019e0416-5046-7a70-9c3e-d5d474ed6d31" xlink:to="loc_us-gaap_FurnitureAndFixturesMember_019e0416-5046-768e-8ad4-1543309f6361" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConstructionInProgressMember_019e0416-5046-7b70-b1e9-5bd41f24829a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ConstructionInProgressMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019e0416-5046-7a70-9c3e-d5d474ed6d31" xlink:to="loc_us-gaap_ConstructionInProgressMember_019e0416-5046-7b70-b1e9-5bd41f24829a" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization_019e0416-5046-73f9-aa7c-ed6aa7d3faa1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019e0416-5046-7437-8ab3-366f3c74d687" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization_019e0416-5046-73f9-aa7c-ed6aa7d3faa1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization_019e0416-5046-7747-9c2f-8daf59ebc1fa" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019e0416-5046-7437-8ab3-366f3c74d687" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization_019e0416-5046-7747-9c2f-8daf59ebc1fa" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization_019e0416-5046-75b3-8b1b-26000793c10c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019e0416-5046-7437-8ab3-366f3c74d687" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization_019e0416-5046-75b3-8b1b-26000793c10c" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.jobyaviation.com/role/BalanceSheetComponentsScheduleofIntangibleAssetsDetails" xlink:type="simple" xlink:href="joby-20260630.xsd#BalanceSheetComponentsScheduleofIntangibleAssetsDetails"/>
  <link:definitionLink xlink:role="http://www.jobyaviation.com/role/BalanceSheetComponentsScheduleofIntangibleAssetsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassLineItems_019e0416-5046-78f2-b23e-2299667f0c18" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfIndefiniteLivedIntangibleAssetsTable_019e0416-5046-701c-b872-a1b490aa239e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfIndefiniteLivedIntangibleAssetsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassLineItems_019e0416-5046-78f2-b23e-2299667f0c18" xlink:to="loc_us-gaap_ScheduleOfIndefiniteLivedIntangibleAssetsTable_019e0416-5046-701c-b872-a1b490aa239e" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_019e0416-5046-7c69-b307-29fdba964932" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfIndefiniteLivedIntangibleAssetsTable_019e0416-5046-701c-b872-a1b490aa239e" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_019e0416-5046-7c69-b307-29fdba964932" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019e0416-5046-7c69-b307-29fdba964932_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_019e0416-5046-7c69-b307-29fdba964932" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019e0416-5046-7c69-b307-29fdba964932_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019e0416-5046-7e23-84da-c77c4eda299a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_019e0416-5046-7c69-b307-29fdba964932" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019e0416-5046-7e23-84da-c77c4eda299a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DevelopedTechnologyRightsMember_019e0416-5046-75fe-9a5b-96c4d028268f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DevelopedTechnologyRightsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019e0416-5046-7e23-84da-c77c4eda299a" xlink:to="loc_us-gaap_DevelopedTechnologyRightsMember_019e0416-5046-75fe-9a5b-96c4d028268f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_joby_ExclusiveRightsToAirTransportationServicesMember_019eb540-4ff3-7126-b0e0-4b0cd3ebaf2a" xlink:href="joby-20260630.xsd#joby_ExclusiveRightsToAirTransportationServicesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019e0416-5046-7e23-84da-c77c4eda299a" xlink:to="loc_joby_ExclusiveRightsToAirTransportationServicesMember_019eb540-4ff3-7126-b0e0-4b0cd3ebaf2a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LeasesAcquiredInPlaceMember_019eb540-9dda-76bf-a251-bb8a42d83527" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LeasesAcquiredInPlaceMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019e0416-5046-7e23-84da-c77c4eda299a" xlink:to="loc_us-gaap_LeasesAcquiredInPlaceMember_019eb540-9dda-76bf-a251-bb8a42d83527" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherIntangibleAssetsMember_019e0416-5046-7ff7-9fbc-98500b4e3000" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherIntangibleAssetsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019e0416-5046-7e23-84da-c77c4eda299a" xlink:to="loc_us-gaap_OtherIntangibleAssetsMember_019e0416-5046-7ff7-9fbc-98500b4e3000" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsGross_019e0416-5046-7c55-8e94-3bfd694589ef" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FiniteLivedIntangibleAssetsGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassLineItems_019e0416-5046-78f2-b23e-2299667f0c18" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsGross_019e0416-5046-7c55-8e94-3bfd694589ef" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_019e6751-728f-7802-bab3-8b21e923477d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassLineItems_019e0416-5046-78f2-b23e-2299667f0c18" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_019e6751-728f-7802-bab3-8b21e923477d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsNet_019e0416-5046-79d7-a798-b21d8f03bbda" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FiniteLivedIntangibleAssetsNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassLineItems_019e0416-5046-78f2-b23e-2299667f0c18" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsNet_019e0416-5046-79d7-a798-b21d8f03bbda" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.jobyaviation.com/role/LongtermdebtScheduleofLongTermDebtInstrumentsDetails" xlink:type="simple" xlink:href="joby-20260630.xsd#LongtermdebtScheduleofLongTermDebtInstrumentsDetails"/>
  <link:definitionLink xlink:role="http://www.jobyaviation.com/role/LongtermdebtScheduleofLongTermDebtInstrumentsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_019eb556-29ae-75ca-8fb0-5140361582d4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTable_019eb556-29ae-7c9b-a459-ce734b350061" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019eb556-29ae-75ca-8fb0-5140361582d4" xlink:to="loc_us-gaap_DebtInstrumentTable_019eb556-29ae-7c9b-a459-ce734b350061" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_019eb556-29ae-7fd9-ac95-cabfecbbc397" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019eb556-29ae-7c9b-a459-ce734b350061" xlink:to="loc_us-gaap_DebtInstrumentAxis_019eb556-29ae-7fd9-ac95-cabfecbbc397" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019eb556-29ae-7fd9-ac95-cabfecbbc397_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_019eb556-29ae-7fd9-ac95-cabfecbbc397" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019eb556-29ae-7fd9-ac95-cabfecbbc397_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019eb556-29ae-7f82-a16c-4259b7e7b1c3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_019eb556-29ae-7fd9-ac95-cabfecbbc397" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019eb556-29ae-7f82-a16c-4259b7e7b1c3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_joby_ConvertibleSeniorNotesDue2032Member_019eb556-29ae-7be6-9687-425555e5e7f1" xlink:href="joby-20260630.xsd#joby_ConvertibleSeniorNotesDue2032Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019eb556-29ae-7f82-a16c-4259b7e7b1c3" xlink:to="loc_joby_ConvertibleSeniorNotesDue2032Member_019eb556-29ae-7be6-9687-425555e5e7f1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_joby_MortgageLoan6.784Due2036Member_019eb556-29ae-7421-b917-54d4dc099b08" xlink:href="joby-20260630.xsd#joby_MortgageLoan6.784Due2036Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019eb556-29ae-7f82-a16c-4259b7e7b1c3" xlink:to="loc_joby_MortgageLoan6.784Due2036Member_019eb556-29ae-7421-b917-54d4dc099b08" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_019eb556-29ae-72d6-9efa-655328202617" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019eb556-29ae-7c9b-a459-ce734b350061" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_019eb556-29ae-72d6-9efa-655328202617" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019eb556-29ae-72d6-9efa-655328202617_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_019eb556-29ae-72d6-9efa-655328202617" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019eb556-29ae-72d6-9efa-655328202617_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019eb556-29ae-7d12-b422-835c1c311c1a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_019eb556-29ae-72d6-9efa-655328202617" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019eb556-29ae-7d12-b422-835c1c311c1a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConvertibleDebtMember_019eb556-29ae-7bf7-8c7c-6aaa4da346ff" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ConvertibleDebtMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_019eb556-29ae-7d12-b422-835c1c311c1a" xlink:to="loc_us-gaap_ConvertibleDebtMember_019eb556-29ae-7bf7-8c7c-6aaa4da346ff" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MortgagesMember_019eb556-29ae-7d05-93a8-c62c8cc0d695" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_MortgagesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_019eb556-29ae-7d12-b422-835c1c311c1a" xlink:to="loc_us-gaap_MortgagesMember_019eb556-29ae-7d05-93a8-c62c8cc0d695" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebt_019eb556-29ae-7d73-b2b0-0dbfceea03e9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongTermDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019eb556-29ae-75ca-8fb0-5140361582d4" xlink:to="loc_us-gaap_LongTermDebt_019eb556-29ae-7d73-b2b0-0dbfceea03e9" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.jobyaviation.com/role/LongtermdebtAdditionalInformationDetails" xlink:type="simple" xlink:href="joby-20260630.xsd#LongtermdebtAdditionalInformationDetails"/>
  <link:definitionLink xlink:role="http://www.jobyaviation.com/role/LongtermdebtAdditionalInformationDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_019eb556-b1a2-7061-8d78-67a579fa062e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTable_019eb556-b1a2-7d47-abbb-638907ddb404" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019eb556-b1a2-7061-8d78-67a579fa062e" xlink:to="loc_us-gaap_DebtInstrumentTable_019eb556-b1a2-7d47-abbb-638907ddb404" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_019eb556-b1a2-701d-b1fc-8fffab29b97a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019eb556-b1a2-7d47-abbb-638907ddb404" xlink:to="loc_us-gaap_DebtInstrumentAxis_019eb556-b1a2-701d-b1fc-8fffab29b97a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019eb556-b1a2-701d-b1fc-8fffab29b97a_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_019eb556-b1a2-701d-b1fc-8fffab29b97a" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019eb556-b1a2-701d-b1fc-8fffab29b97a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019eb556-b1a2-7ca1-be64-cf80cf3fec35" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_019eb556-b1a2-701d-b1fc-8fffab29b97a" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019eb556-b1a2-7ca1-be64-cf80cf3fec35" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_joby_ConvertibleSeniorNotesDue2032Member_019eb556-b1a2-7cdc-adbc-068993d6bd82" xlink:href="joby-20260630.xsd#joby_ConvertibleSeniorNotesDue2032Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019eb556-b1a2-7ca1-be64-cf80cf3fec35" xlink:to="loc_joby_ConvertibleSeniorNotesDue2032Member_019eb556-b1a2-7cdc-adbc-068993d6bd82" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_joby_MortgageLoan6.784Due2036Member_019eb557-557e-759c-955f-f95358bcf6f3" xlink:href="joby-20260630.xsd#joby_MortgageLoan6.784Due2036Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019eb556-b1a2-7ca1-be64-cf80cf3fec35" xlink:to="loc_joby_MortgageLoan6.784Due2036Member_019eb557-557e-759c-955f-f95358bcf6f3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_019eb556-b1a2-75fe-8869-f73acb5fe08e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019eb556-b1a2-7d47-abbb-638907ddb404" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_019eb556-b1a2-75fe-8869-f73acb5fe08e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019eb556-b1a2-75fe-8869-f73acb5fe08e_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_019eb556-b1a2-75fe-8869-f73acb5fe08e" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019eb556-b1a2-75fe-8869-f73acb5fe08e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019eb556-b1a2-7ec2-bbce-4e03abd1a9ef" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_019eb556-b1a2-75fe-8869-f73acb5fe08e" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019eb556-b1a2-7ec2-bbce-4e03abd1a9ef" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConvertibleDebtMember_019eb556-b1a2-79be-a5e3-9b48eb510123" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ConvertibleDebtMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_019eb556-b1a2-7ec2-bbce-4e03abd1a9ef" xlink:to="loc_us-gaap_ConvertibleDebtMember_019eb556-b1a2-79be-a5e3-9b48eb510123" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MortgagesMember_019eb557-557e-74f4-bdac-9337d0c7f77d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_MortgagesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_019eb556-b1a2-7ec2-bbce-4e03abd1a9ef" xlink:to="loc_us-gaap_MortgagesMember_019eb557-557e-74f4-bdac-9337d0c7f77d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_joby_DebtInstrumentConvertibleTermsOfConversionAxis_019eb556-b1a2-7566-ac69-9b522a6ce73d" xlink:href="joby-20260630.xsd#joby_DebtInstrumentConvertibleTermsOfConversionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019eb556-b1a2-7d47-abbb-638907ddb404" xlink:to="loc_joby_DebtInstrumentConvertibleTermsOfConversionAxis_019eb556-b1a2-7566-ac69-9b522a6ce73d" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_joby_DebtInstrumentConvertibleTermsOfConversionDomain_019eb556-b1a2-7566-ac69-9b522a6ce73d_default" xlink:href="joby-20260630.xsd#joby_DebtInstrumentConvertibleTermsOfConversionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_joby_DebtInstrumentConvertibleTermsOfConversionAxis_019eb556-b1a2-7566-ac69-9b522a6ce73d" xlink:to="loc_joby_DebtInstrumentConvertibleTermsOfConversionDomain_019eb556-b1a2-7566-ac69-9b522a6ce73d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_joby_DebtInstrumentConvertibleTermsOfConversionDomain_019eb556-b1a2-7ca8-bc6e-318644947e43" xlink:href="joby-20260630.xsd#joby_DebtInstrumentConvertibleTermsOfConversionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_joby_DebtInstrumentConvertibleTermsOfConversionAxis_019eb556-b1a2-7566-ac69-9b522a6ce73d" xlink:to="loc_joby_DebtInstrumentConvertibleTermsOfConversionDomain_019eb556-b1a2-7ca8-bc6e-318644947e43" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_joby_DebtConversionConditionOneMember_019eb556-b1a2-7d70-a525-cad7ef613a35" xlink:href="joby-20260630.xsd#joby_DebtConversionConditionOneMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_joby_DebtInstrumentConvertibleTermsOfConversionDomain_019eb556-b1a2-7ca8-bc6e-318644947e43" xlink:to="loc_joby_DebtConversionConditionOneMember_019eb556-b1a2-7d70-a525-cad7ef613a35" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_joby_DebtConversionConditionTwoMember_019eb556-b1a2-7039-be92-aac128c3daec" xlink:href="joby-20260630.xsd#joby_DebtConversionConditionTwoMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_joby_DebtInstrumentConvertibleTermsOfConversionDomain_019eb556-b1a2-7ca8-bc6e-318644947e43" xlink:to="loc_joby_DebtConversionConditionTwoMember_019eb556-b1a2-7039-be92-aac128c3daec" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentFaceAmount_019eb556-b1a2-7603-986b-7514edea04a2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentFaceAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019eb556-b1a2-7061-8d78-67a579fa062e" xlink:to="loc_us-gaap_DebtInstrumentFaceAmount_019eb556-b1a2-7603-986b-7514edea04a2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_019eb556-b1a2-7af7-8c03-d6a00a995b42" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019eb556-b1a2-7061-8d78-67a579fa062e" xlink:to="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_019eb556-b1a2-7af7-8c03-d6a00a995b42" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_joby_DebtInstrumentConvertibleAdditionalPurchaseOptionAmount_019eb556-b1a2-751e-aa92-01492660c07e" xlink:href="joby-20260630.xsd#joby_DebtInstrumentConvertibleAdditionalPurchaseOptionAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019eb556-b1a2-7061-8d78-67a579fa062e" xlink:to="loc_joby_DebtInstrumentConvertibleAdditionalPurchaseOptionAmount_019eb556-b1a2-751e-aa92-01492660c07e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromConvertibleDebt_019eb556-b1a2-7a61-8133-47d9af09ac63" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ProceedsFromConvertibleDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019eb556-b1a2-7061-8d78-67a579fa062e" xlink:to="loc_us-gaap_ProceedsFromConvertibleDebt_019eb556-b1a2-7a61-8133-47d9af09ac63" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredFinanceCostsNet_019eb556-b1a2-7066-a255-39f598fe07fa" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DeferredFinanceCostsNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019eb556-b1a2-7061-8d78-67a579fa062e" xlink:to="loc_us-gaap_DeferredFinanceCostsNet_019eb556-b1a2-7066-a255-39f598fe07fa" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentConvertibleThresholdTradingDays_019eb556-b1a2-75f4-bc80-bf077e54c03d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentConvertibleThresholdTradingDays"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019eb556-b1a2-7061-8d78-67a579fa062e" xlink:to="loc_us-gaap_DebtInstrumentConvertibleThresholdTradingDays_019eb556-b1a2-75f4-bc80-bf077e54c03d" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentConvertibleThresholdConsecutiveTradingDays1_019eb556-b1a2-775a-8c6b-6f0d57e1b182" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentConvertibleThresholdConsecutiveTradingDays1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019eb556-b1a2-7061-8d78-67a579fa062e" xlink:to="loc_us-gaap_DebtInstrumentConvertibleThresholdConsecutiveTradingDays1_019eb556-b1a2-775a-8c6b-6f0d57e1b182" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentConvertibleThresholdPercentageOfStockPriceTrigger_019eb556-b1a2-7a36-9a45-75031bcd3890" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentConvertibleThresholdPercentageOfStockPriceTrigger"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019eb556-b1a2-7061-8d78-67a579fa062e" xlink:to="loc_us-gaap_DebtInstrumentConvertibleThresholdPercentageOfStockPriceTrigger_019eb556-b1a2-7a36-9a45-75031bcd3890" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_joby_DebtInstrumentConvertibleThresholdPercentageOfStockTradingPrice_019eb556-b1a2-7cc5-9f6f-16fe97b65085" xlink:href="joby-20260630.xsd#joby_DebtInstrumentConvertibleThresholdPercentageOfStockTradingPrice"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019eb556-b1a2-7061-8d78-67a579fa062e" xlink:to="loc_joby_DebtInstrumentConvertibleThresholdPercentageOfStockTradingPrice_019eb556-b1a2-7cc5-9f6f-16fe97b65085" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentConvertibleConversionRatio1_019eb557-01cf-79cb-be6e-59d15e7f327d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentConvertibleConversionRatio1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019eb556-b1a2-7061-8d78-67a579fa062e" xlink:to="loc_us-gaap_DebtInstrumentConvertibleConversionRatio1_019eb557-01cf-79cb-be6e-59d15e7f327d" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentConvertibleConversionPrice1_019eb557-557e-7a98-91b0-8d205bc451bc" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentConvertibleConversionPrice1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019eb556-b1a2-7061-8d78-67a579fa062e" xlink:to="loc_us-gaap_DebtInstrumentConvertibleConversionPrice1_019eb557-557e-7a98-91b0-8d205bc451bc" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConvertibleDebtFairValueDisclosures_019eb557-557e-7b07-97f4-6b954dcac26e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ConvertibleDebtFairValueDisclosures"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019eb556-b1a2-7061-8d78-67a579fa062e" xlink:to="loc_us-gaap_ConvertibleDebtFairValueDisclosures_019eb557-557e-7b07-97f4-6b954dcac26e" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentInterestRateEffectivePercentage_019eb557-557e-7ff8-9450-5fd06999dab1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentInterestRateEffectivePercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019eb556-b1a2-7061-8d78-67a579fa062e" xlink:to="loc_us-gaap_DebtInstrumentInterestRateEffectivePercentage_019eb557-557e-7ff8-9450-5fd06999dab1" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestExpenseDebt_019eb557-557e-7857-94d9-930bbadf380e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InterestExpenseDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019eb556-b1a2-7061-8d78-67a579fa062e" xlink:to="loc_us-gaap_InterestExpenseDebt_019eb557-557e-7857-94d9-930bbadf380e" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestExpenseDebtExcludingAmortization_019eb557-557e-73f1-bfbe-c38b22688640" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InterestExpenseDebtExcludingAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019eb556-b1a2-7061-8d78-67a579fa062e" xlink:to="loc_us-gaap_InterestExpenseDebtExcludingAmortization_019eb557-557e-73f1-bfbe-c38b22688640" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AmortizationOfFinancingCosts_019eb557-557e-79ac-a7a4-05d7361da6be" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AmortizationOfFinancingCosts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019eb556-b1a2-7061-8d78-67a579fa062e" xlink:to="loc_us-gaap_AmortizationOfFinancingCosts_019eb557-557e-79ac-a7a4-05d7361da6be" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentCollateralAmount_019eb557-557e-7129-9b6c-c3d395ee7ee1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentCollateralAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019eb556-b1a2-7061-8d78-67a579fa062e" xlink:to="loc_us-gaap_DebtInstrumentCollateralAmount_019eb557-557e-7129-9b6c-c3d395ee7ee1" xlink:type="arc" order="16"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.jobyaviation.com/role/StockWarrantsEarnoutSharesandContingentConsiderationAdditionalInformationDetails" xlink:type="simple" xlink:href="joby-20260630.xsd#StockWarrantsEarnoutSharesandContingentConsiderationAdditionalInformationDetails"/>
  <link:definitionLink xlink:role="http://www.jobyaviation.com/role/StockWarrantsEarnoutSharesandContingentConsiderationAdditionalInformationDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfWarrantOrRightLineItems_019e0416-5046-7ff7-b91f-fad055e36930" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ClassOfWarrantOrRightLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfWarrantOrRightTable_019e0416-5046-7820-b65e-e16d8aae5b2f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ClassOfWarrantOrRightTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ClassOfWarrantOrRightLineItems_019e0416-5046-7ff7-b91f-fad055e36930" xlink:to="loc_us-gaap_ClassOfWarrantOrRightTable_019e0416-5046-7820-b65e-e16d8aae5b2f" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_019e0416-5046-7763-b343-500b25b96a98" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementEquityComponentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ClassOfWarrantOrRightTable_019e0416-5046-7820-b65e-e16d8aae5b2f" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_019e0416-5046-7763-b343-500b25b96a98" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_019e0416-5046-7763-b343-500b25b96a98_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_019e0416-5046-7763-b343-500b25b96a98" xlink:to="loc_us-gaap_EquityComponentDomain_019e0416-5046-7763-b343-500b25b96a98_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_019e0416-5046-77bc-bd73-ed4852b73513" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_019e0416-5046-7763-b343-500b25b96a98" xlink:to="loc_us-gaap_EquityComponentDomain_019e0416-5046-77bc-bd73-ed4852b73513" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockMember_019e0416-5046-73d5-ab84-3273b60723ee" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_019e0416-5046-77bc-bd73-ed4852b73513" xlink:to="loc_us-gaap_CommonStockMember_019e0416-5046-73d5-ab84-3273b60723ee" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfWarrantOrRightAxis_019e0416-5046-7838-be91-f358f37d8ef9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ClassOfWarrantOrRightAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ClassOfWarrantOrRightTable_019e0416-5046-7820-b65e-e16d8aae5b2f" xlink:to="loc_us-gaap_ClassOfWarrantOrRightAxis_019e0416-5046-7838-be91-f358f37d8ef9" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfWarrantOrRightDomain_019e0416-5046-7838-be91-f358f37d8ef9_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ClassOfWarrantOrRightDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ClassOfWarrantOrRightAxis_019e0416-5046-7838-be91-f358f37d8ef9" xlink:to="loc_us-gaap_ClassOfWarrantOrRightDomain_019e0416-5046-7838-be91-f358f37d8ef9_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfWarrantOrRightDomain_019e0416-5046-73bf-a1f5-846be7f8d5cc" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ClassOfWarrantOrRightDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ClassOfWarrantOrRightAxis_019e0416-5046-7838-be91-f358f37d8ef9" xlink:to="loc_us-gaap_ClassOfWarrantOrRightDomain_019e0416-5046-73bf-a1f5-846be7f8d5cc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_joby_PublicWarrantsMember_019e0416-5046-7db2-a5a8-8a27e8596767" xlink:href="joby-20260630.xsd#joby_PublicWarrantsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfWarrantOrRightDomain_019e0416-5046-73bf-a1f5-846be7f8d5cc" xlink:to="loc_joby_PublicWarrantsMember_019e0416-5046-7db2-a5a8-8a27e8596767" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_joby_PrivatePlacementWarrantsMember_019e0416-5046-7d0f-a547-5874faed8c00" xlink:href="joby-20260630.xsd#joby_PrivatePlacementWarrantsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfWarrantOrRightDomain_019e0416-5046-73bf-a1f5-846be7f8d5cc" xlink:to="loc_joby_PrivatePlacementWarrantsMember_019e0416-5046-7d0f-a547-5874faed8c00" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_joby_EarnOutSharesMember_019e0416-5046-7e44-94b6-bec70ca86327" xlink:href="joby-20260630.xsd#joby_EarnOutSharesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfWarrantOrRightDomain_019e0416-5046-73bf-a1f5-846be7f8d5cc" xlink:to="loc_joby_EarnOutSharesMember_019e0416-5046-7e44-94b6-bec70ca86327" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_joby_DeltaWarrantsMember_019e0416-5046-7763-aa1a-6d535ea32475" xlink:href="joby-20260630.xsd#joby_DeltaWarrantsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfWarrantOrRightDomain_019e0416-5046-73bf-a1f5-846be7f8d5cc" xlink:to="loc_joby_DeltaWarrantsMember_019e0416-5046-7763-aa1a-6d535ea32475" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_joby_EBITDAEarnoutLiabilityMember_019f7d91-4789-7bb1-a92c-d8df11ed92bf" xlink:href="joby-20260630.xsd#joby_EBITDAEarnoutLiabilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfWarrantOrRightDomain_019e0416-5046-73bf-a1f5-846be7f8d5cc" xlink:to="loc_joby_EBITDAEarnoutLiabilityMember_019f7d91-4789-7bb1-a92c-d8df11ed92bf" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameAxis_019e0416-5046-76f5-ae8b-38c3d1b30663" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PlanNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ClassOfWarrantOrRightTable_019e0416-5046-7820-b65e-e16d8aae5b2f" xlink:to="loc_us-gaap_PlanNameAxis_019e0416-5046-76f5-ae8b-38c3d1b30663" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_019e0416-5046-76f5-ae8b-38c3d1b30663_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PlanNameAxis_019e0416-5046-76f5-ae8b-38c3d1b30663" xlink:to="loc_us-gaap_PlanNameDomain_019e0416-5046-76f5-ae8b-38c3d1b30663_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_019e0416-5046-711f-b3f9-baff907de47a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PlanNameAxis_019e0416-5046-76f5-ae8b-38c3d1b30663" xlink:to="loc_us-gaap_PlanNameDomain_019e0416-5046-711f-b3f9-baff907de47a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_joby_TrancheOneMember_019e0416-5046-7999-b537-852520ec5432" xlink:href="joby-20260630.xsd#joby_TrancheOneMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanNameDomain_019e0416-5046-711f-b3f9-baff907de47a" xlink:to="loc_joby_TrancheOneMember_019e0416-5046-7999-b537-852520ec5432" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_joby_TrancheTwoMember_019e0416-5046-7c46-b908-0b32aa768b6c" xlink:href="joby-20260630.xsd#joby_TrancheTwoMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanNameDomain_019e0416-5046-711f-b3f9-baff907de47a" xlink:to="loc_joby_TrancheTwoMember_019e0416-5046-7c46-b908-0b32aa768b6c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_joby_TrancheThreeMember_019e0416-5046-7920-a616-5d6b99ff3056" xlink:href="joby-20260630.xsd#joby_TrancheThreeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanNameDomain_019e0416-5046-711f-b3f9-baff907de47a" xlink:to="loc_joby_TrancheThreeMember_019e0416-5046-7920-a616-5d6b99ff3056" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_joby_TrancheFourMember_019e0416-5046-7ae8-807a-b1d7970f4be5" xlink:href="joby-20260630.xsd#joby_TrancheFourMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanNameDomain_019e0416-5046-711f-b3f9-baff907de47a" xlink:to="loc_joby_TrancheFourMember_019e0416-5046-7ae8-807a-b1d7970f4be5" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_joby_TrancheFiveMember_019e0416-5046-7222-bec9-f11478cfc4f9" xlink:href="joby-20260630.xsd#joby_TrancheFiveMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanNameDomain_019e0416-5046-711f-b3f9-baff907de47a" xlink:to="loc_joby_TrancheFiveMember_019e0416-5046-7222-bec9-f11478cfc4f9" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_019e0416-5046-7502-8e35-b2665c36f3a0" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ClassOfWarrantOrRightTable_019e0416-5046-7820-b65e-e16d8aae5b2f" xlink:to="loc_srt_RangeAxis_019e0416-5046-7502-8e35-b2665c36f3a0" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019e0416-5046-7502-8e35-b2665c36f3a0_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_019e0416-5046-7502-8e35-b2665c36f3a0" xlink:to="loc_srt_RangeMember_019e0416-5046-7502-8e35-b2665c36f3a0_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019e0416-5046-7fd8-aacb-b913e027909c" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_019e0416-5046-7502-8e35-b2665c36f3a0" xlink:to="loc_srt_RangeMember_019e0416-5046-7fd8-aacb-b913e027909c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_019e0416-5046-769e-bf5f-36566ea4520e" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_019e0416-5046-7fd8-aacb-b913e027909c" xlink:to="loc_srt_MinimumMember_019e0416-5046-769e-bf5f-36566ea4520e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_019e0416-5046-7ba6-bedb-1b0fc4aa08c9" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_019e0416-5046-7fd8-aacb-b913e027909c" xlink:to="loc_srt_MaximumMember_019e0416-5046-7ba6-bedb-1b0fc4aa08c9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_019ecf57-7075-70f1-a035-9ab6ed896c0f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessAcquisitionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ClassOfWarrantOrRightTable_019e0416-5046-7820-b65e-e16d8aae5b2f" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_019ecf57-7075-70f1-a035-9ab6ed896c0f" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019ecf57-7075-70f1-a035-9ab6ed896c0f_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_019ecf57-7075-70f1-a035-9ab6ed896c0f" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019ecf57-7075-70f1-a035-9ab6ed896c0f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019ecf57-7075-76a7-a623-79f9f56f403a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_019ecf57-7075-70f1-a035-9ab6ed896c0f" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019ecf57-7075-76a7-a623-79f9f56f403a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_joby_BladeUrbanAirMobilityLLCAcquisitionMember_019ecf57-a114-7523-949d-2fe91f0403a4" xlink:href="joby-20260630.xsd#joby_BladeUrbanAirMobilityLLCAcquisitionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019ecf57-7075-76a7-a623-79f9f56f403a" xlink:to="loc_joby_BladeUrbanAirMobilityLLCAcquisitionMember_019ecf57-a114-7523-949d-2fe91f0403a4" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_joby_WarrantsIssuedToSponsor_019e0416-5046-7de1-a0ed-3f9e38dd7e57" xlink:href="joby-20260630.xsd#joby_WarrantsIssuedToSponsor"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfWarrantOrRightLineItems_019e0416-5046-7ff7-b91f-fad055e36930" xlink:to="loc_joby_WarrantsIssuedToSponsor_019e0416-5046-7de1-a0ed-3f9e38dd7e57" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByEachWarrantOrRight_019e0416-5046-7bb9-9733-5f9a768a843a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByEachWarrantOrRight"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfWarrantOrRightLineItems_019e0416-5046-7ff7-b91f-fad055e36930" xlink:to="loc_us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByEachWarrantOrRight_019e0416-5046-7bb9-9733-5f9a768a843a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockParOrStatedValuePerShare_019e0416-5046-7693-9ea2-333dd584ee9d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonStockParOrStatedValuePerShare"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfWarrantOrRightLineItems_019e0416-5046-7ff7-b91f-fad055e36930" xlink:to="loc_us-gaap_CommonStockParOrStatedValuePerShare_019e0416-5046-7693-9ea2-333dd584ee9d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1_019e0416-5046-7cfd-84fd-f1c9bec7f4e6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfWarrantOrRightLineItems_019e0416-5046-7ff7-b91f-fad055e36930" xlink:to="loc_us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1_019e0416-5046-7cfd-84fd-f1c9bec7f4e6" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WarrantsAndRightsOutstandingTerm_019e0416-5046-76f1-a291-8d4cfce4c044" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_WarrantsAndRightsOutstandingTerm"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfWarrantOrRightLineItems_019e0416-5046-7ff7-b91f-fad055e36930" xlink:to="loc_us-gaap_WarrantsAndRightsOutstandingTerm_019e0416-5046-76f1-a291-8d4cfce4c044" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WarrantsAndRightsOutstanding_019e0416-5046-729b-8a6e-95cd76e40b24" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_WarrantsAndRightsOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfWarrantOrRightLineItems_019e0416-5046-7ff7-b91f-fad055e36930" xlink:to="loc_us-gaap_WarrantsAndRightsOutstanding_019e0416-5046-729b-8a6e-95cd76e40b24" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities_019ecf4e-cc99-7d7c-86a5-1420d52bdec1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfWarrantOrRightLineItems_019e0416-5046-7ff7-b91f-fad055e36930" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities_019ecf4e-cc99-7d7c-86a5-1420d52bdec1" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_joby_ClassOfWarrantsOrRightExercised_019e0416-5046-7e27-b54d-65b71e44f14b" xlink:href="joby-20260630.xsd#joby_ClassOfWarrantsOrRightExercised"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfWarrantOrRightLineItems_019e0416-5046-7ff7-b91f-fad055e36930" xlink:to="loc_joby_ClassOfWarrantsOrRightExercised_019e0416-5046-7e27-b54d-65b71e44f14b" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainLossOnDerivativeInstrumentsNetPretax_019e0416-5046-76ae-8458-115361facd69" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_GainLossOnDerivativeInstrumentsNetPretax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfWarrantOrRightLineItems_019e0416-5046-7ff7-b91f-fad055e36930" xlink:to="loc_us-gaap_GainLossOnDerivativeInstrumentsNetPretax_019e0416-5046-76ae-8458-115361facd69" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_joby_LockUpAndTransferOfCommonShares_019e0416-5046-744f-a791-037758a0365f" xlink:href="joby-20260630.xsd#joby_LockUpAndTransferOfCommonShares"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfWarrantOrRightLineItems_019e0416-5046-7ff7-b91f-fad055e36930" xlink:to="loc_joby_LockUpAndTransferOfCommonShares_019e0416-5046-744f-a791-037758a0365f" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_joby_EarnoutShareVestingPercentage_019e0416-5046-7682-990b-45a4ead71380" xlink:href="joby-20260630.xsd#joby_EarnoutShareVestingPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfWarrantOrRightLineItems_019e0416-5046-7ff7-b91f-fad055e36930" xlink:to="loc_joby_EarnoutShareVestingPercentage_019e0416-5046-7682-990b-45a4ead71380" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_joby_WeightedAveragePricePerShare_019e0416-5046-7775-913b-6f218428eb07" xlink:href="joby-20260630.xsd#joby_WeightedAveragePricePerShare"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfWarrantOrRightLineItems_019e0416-5046-7ff7-b91f-fad055e36930" xlink:to="loc_joby_WeightedAveragePricePerShare_019e0416-5046-7775-913b-6f218428eb07" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_joby_NumberOfTradingDays_019e0416-5046-7701-b93a-31e57913961a" xlink:href="joby-20260630.xsd#joby_NumberOfTradingDays"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfWarrantOrRightLineItems_019e0416-5046-7ff7-b91f-fad055e36930" xlink:to="loc_joby_NumberOfTradingDays_019e0416-5046-7701-b93a-31e57913961a" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_joby_EarnoutSharesVested_019e0416-5046-7eb0-ad81-7bbb26b47a01" xlink:href="joby-20260630.xsd#joby_EarnoutSharesVested"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfWarrantOrRightLineItems_019e0416-5046-7ff7-b91f-fad055e36930" xlink:to="loc_joby_EarnoutSharesVested_019e0416-5046-7eb0-ad81-7bbb26b47a01" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeLiabilities_019e0416-5046-78da-8f11-fb95f3ac86c4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfWarrantOrRightLineItems_019e0416-5046-7ff7-b91f-fad055e36930" xlink:to="loc_us-gaap_DerivativeLiabilities_019e0416-5046-78da-8f11-fb95f3ac86c4" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesOther_019e0416-5046-7179-a625-7bac4c78094c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockIssuedDuringPeriodSharesOther"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfWarrantOrRightLineItems_019e0416-5046-7ff7-b91f-fad055e36930" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesOther_019e0416-5046-7179-a625-7bac4c78094c" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharesIssuedPricePerShare_019e0416-5046-76b9-9a68-a586d8ecf060" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SharesIssuedPricePerShare"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfWarrantOrRightLineItems_019e0416-5046-7ff7-b91f-fad055e36930" xlink:to="loc_us-gaap_SharesIssuedPricePerShare_019e0416-5046-76b9-9a68-a586d8ecf060" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueOther_019e0416-5046-7cd3-b753-1e712505c934" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockIssuedDuringPeriodValueOther"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfWarrantOrRightLineItems_019e0416-5046-7ff7-b91f-fad055e36930" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueOther_019e0416-5046-7cd3-b753-1e712505c934" xlink:type="arc" order="17"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfWarrantOrRightOutstanding_019e0416-5046-75b1-b1fe-2356c2945f66" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ClassOfWarrantOrRightOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfWarrantOrRightLineItems_019e0416-5046-7ff7-b91f-fad055e36930" xlink:to="loc_us-gaap_ClassOfWarrantOrRightOutstanding_019e0416-5046-75b1-b1fe-2356c2945f66" xlink:type="arc" order="18"/>
    <link:loc xlink:type="locator" xlink:label="loc_joby_ClassOfWarrantOrRightNumberOfTranches_019e0416-5046-73a3-b9d4-4abae05017ac" xlink:href="joby-20260630.xsd#joby_ClassOfWarrantOrRightNumberOfTranches"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfWarrantOrRightLineItems_019e0416-5046-7ff7-b91f-fad055e36930" xlink:to="loc_joby_ClassOfWarrantOrRightNumberOfTranches_019e0416-5046-73a3-b9d4-4abae05017ac" xlink:type="arc" order="19"/>
    <link:loc xlink:type="locator" xlink:label="loc_joby_ClassOfWarrantOrRightValueCapAdjustmentPeriod_019e0416-5046-771a-a265-8bf4ba454700" xlink:href="joby-20260630.xsd#joby_ClassOfWarrantOrRightValueCapAdjustmentPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfWarrantOrRightLineItems_019e0416-5046-7ff7-b91f-fad055e36930" xlink:to="loc_joby_ClassOfWarrantOrRightValueCapAdjustmentPeriod_019e0416-5046-771a-a265-8bf4ba454700" xlink:type="arc" order="20"/>
    <link:loc xlink:type="locator" xlink:label="loc_joby_ClassOfWarrantOrRightValueCapAdjustmentPeriodStockPriceTriggerPercent_019e0416-5046-79f7-95c4-2e7bcd592e78" xlink:href="joby-20260630.xsd#joby_ClassOfWarrantOrRightValueCapAdjustmentPeriodStockPriceTriggerPercent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfWarrantOrRightLineItems_019e0416-5046-7ff7-b91f-fad055e36930" xlink:to="loc_joby_ClassOfWarrantOrRightValueCapAdjustmentPeriodStockPriceTriggerPercent_019e0416-5046-79f7-95c4-2e7bcd592e78" xlink:type="arc" order="21"/>
    <link:loc xlink:type="locator" xlink:label="loc_joby_ClassOfWarrantOrRightValueCapAdjustmentPeriodThresholdBusinessDays_019e0416-5046-732e-a36d-504b2b2efef4" xlink:href="joby-20260630.xsd#joby_ClassOfWarrantOrRightValueCapAdjustmentPeriodThresholdBusinessDays"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfWarrantOrRightLineItems_019e0416-5046-7ff7-b91f-fad055e36930" xlink:to="loc_joby_ClassOfWarrantOrRightValueCapAdjustmentPeriodThresholdBusinessDays_019e0416-5046-732e-a36d-504b2b2efef4" xlink:type="arc" order="22"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationContingentConsiderationLiability_019ecf57-2514-737e-b8db-9d51e19cfb4d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessCombinationContingentConsiderationLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfWarrantOrRightLineItems_019e0416-5046-7ff7-b91f-fad055e36930" xlink:to="loc_us-gaap_BusinessCombinationContingentConsiderationLiability_019ecf57-2514-737e-b8db-9d51e19cfb4d" xlink:type="arc" order="23"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1_019f8ac6-c606-7414-a96f-806056453c16" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfWarrantOrRightLineItems_019e0416-5046-7ff7-b91f-fad055e36930" xlink:to="loc_us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1_019f8ac6-c606-7414-a96f-806056453c16" xlink:type="arc" order="24"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.jobyaviation.com/role/StockWarrantsEarnoutSharesandContingentConsiderationScheduleofAssumptionsUsedtoEstimateFairValueofEarnoutSharesLiabilityDetails" xlink:type="simple" xlink:href="joby-20260630.xsd#StockWarrantsEarnoutSharesandContingentConsiderationScheduleofAssumptionsUsedtoEstimateFairValueofEarnoutSharesLiabilityDetails"/>
  <link:definitionLink xlink:role="http://www.jobyaviation.com/role/StockWarrantsEarnoutSharesandContingentConsiderationScheduleofAssumptionsUsedtoEstimateFairValueofEarnoutSharesLiabilityDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfWarrantOrRightLineItems_019e0416-5047-784a-9ab4-b9e816513d9e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ClassOfWarrantOrRightLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfWarrantOrRightTable_019e0416-5046-70cb-9ac1-d5bb3ffa73a4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ClassOfWarrantOrRightTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ClassOfWarrantOrRightLineItems_019e0416-5047-784a-9ab4-b9e816513d9e" xlink:to="loc_us-gaap_ClassOfWarrantOrRightTable_019e0416-5046-70cb-9ac1-d5bb3ffa73a4" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfWarrantOrRightAxis_019e0416-5046-7724-9acc-1906577cda51" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ClassOfWarrantOrRightAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ClassOfWarrantOrRightTable_019e0416-5046-70cb-9ac1-d5bb3ffa73a4" xlink:to="loc_us-gaap_ClassOfWarrantOrRightAxis_019e0416-5046-7724-9acc-1906577cda51" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfWarrantOrRightDomain_019e0416-5046-7724-9acc-1906577cda51_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ClassOfWarrantOrRightDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ClassOfWarrantOrRightAxis_019e0416-5046-7724-9acc-1906577cda51" xlink:to="loc_us-gaap_ClassOfWarrantOrRightDomain_019e0416-5046-7724-9acc-1906577cda51_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfWarrantOrRightDomain_019e0416-5046-7d3f-813d-10bfd75d8ee5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ClassOfWarrantOrRightDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ClassOfWarrantOrRightAxis_019e0416-5046-7724-9acc-1906577cda51" xlink:to="loc_us-gaap_ClassOfWarrantOrRightDomain_019e0416-5046-7d3f-813d-10bfd75d8ee5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_joby_DeltaWarrantsMember_019e0416-5047-78e7-ac15-abcaff40086c" xlink:href="joby-20260630.xsd#joby_DeltaWarrantsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfWarrantOrRightDomain_019e0416-5046-7d3f-813d-10bfd75d8ee5" xlink:to="loc_joby_DeltaWarrantsMember_019e0416-5047-78e7-ac15-abcaff40086c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByLiabilityClassAxis_019ecf7c-12ce-7f2f-a57f-0ac2af8d0e9c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueByLiabilityClassAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ClassOfWarrantOrRightTable_019e0416-5046-70cb-9ac1-d5bb3ffa73a4" xlink:to="loc_us-gaap_FairValueByLiabilityClassAxis_019ecf7c-12ce-7f2f-a57f-0ac2af8d0e9c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_019ecf7c-12ce-7f2f-a57f-0ac2af8d0e9c_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByLiabilityClassAxis_019ecf7c-12ce-7f2f-a57f-0ac2af8d0e9c" xlink:to="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_019ecf7c-12ce-7f2f-a57f-0ac2af8d0e9c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_019ecf7c-12ce-79c1-82c2-caaf61fc34f5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByLiabilityClassAxis_019ecf7c-12ce-7f2f-a57f-0ac2af8d0e9c" xlink:to="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_019ecf7c-12ce-79c1-82c2-caaf61fc34f5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_joby_EBITDAEarnoutLiabilityMember_019ecf7c-3abb-7871-af8c-c3c89196928c" xlink:href="joby-20260630.xsd#joby_EBITDAEarnoutLiabilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_019ecf7c-12ce-79c1-82c2-caaf61fc34f5" xlink:to="loc_joby_EBITDAEarnoutLiabilityMember_019ecf7c-3abb-7871-af8c-c3c89196928c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputTypeAxis_019ecf7c-6d61-73cf-bed5-0a681f661a0d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_MeasurementInputTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ClassOfWarrantOrRightTable_019e0416-5046-70cb-9ac1-d5bb3ffa73a4" xlink:to="loc_us-gaap_MeasurementInputTypeAxis_019ecf7c-6d61-73cf-bed5-0a681f661a0d" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputTypeDomain_019ecf7c-6d61-73cf-bed5-0a681f661a0d_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_MeasurementInputTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_MeasurementInputTypeAxis_019ecf7c-6d61-73cf-bed5-0a681f661a0d" xlink:to="loc_us-gaap_MeasurementInputTypeDomain_019ecf7c-6d61-73cf-bed5-0a681f661a0d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputTypeDomain_019ecf7c-6d61-7a45-b175-bdcb5ebca55f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_MeasurementInputTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_MeasurementInputTypeAxis_019ecf7c-6d61-73cf-bed5-0a681f661a0d" xlink:to="loc_us-gaap_MeasurementInputTypeDomain_019ecf7c-6d61-7a45-b175-bdcb5ebca55f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputPriceVolatilityMember_019ecf7c-a448-77bc-b094-fd0491e10f81" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_MeasurementInputPriceVolatilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MeasurementInputTypeDomain_019ecf7c-6d61-7a45-b175-bdcb5ebca55f" xlink:to="loc_us-gaap_MeasurementInputPriceVolatilityMember_019ecf7c-a448-77bc-b094-fd0491e10f81" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputRiskFreeInterestRateMember_019ecf7c-ec67-7fe5-a6dc-ece1fae4e112" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_MeasurementInputRiskFreeInterestRateMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MeasurementInputTypeDomain_019ecf7c-6d61-7a45-b175-bdcb5ebca55f" xlink:to="loc_us-gaap_MeasurementInputRiskFreeInterestRateMember_019ecf7c-ec67-7fe5-a6dc-ece1fae4e112" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputExpectedDividendRateMember_019ecf7d-2786-730e-9e1b-56da19644f55" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_MeasurementInputExpectedDividendRateMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MeasurementInputTypeDomain_019ecf7c-6d61-7a45-b175-bdcb5ebca55f" xlink:to="loc_us-gaap_MeasurementInputExpectedDividendRateMember_019ecf7d-2786-730e-9e1b-56da19644f55" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputExpectedTermMember_019ecf7d-6d19-71a0-bda6-5e0699eabf2f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_MeasurementInputExpectedTermMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MeasurementInputTypeDomain_019ecf7c-6d61-7a45-b175-bdcb5ebca55f" xlink:to="loc_us-gaap_MeasurementInputExpectedTermMember_019ecf7d-6d19-71a0-bda6-5e0699eabf2f" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate_019e0416-5047-7fa8-9917-8ca65a80ed6f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfWarrantOrRightLineItems_019e0416-5047-784a-9ab4-b9e816513d9e" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate_019e0416-5047-7fa8-9917-8ca65a80ed6f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate_019e0416-5047-7099-9ab0-0cdc082a65a1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfWarrantOrRightLineItems_019e0416-5047-784a-9ab4-b9e816513d9e" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate_019e0416-5047-7099-9ab0-0cdc082a65a1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate_019e0416-5047-737b-a506-6945c6530913" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfWarrantOrRightLineItems_019e0416-5047-784a-9ab4-b9e816513d9e" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate_019e0416-5047-737b-a506-6945c6530913" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1_019e0416-5047-78a4-9bc0-69f29437785c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfWarrantOrRightLineItems_019e0416-5047-784a-9ab4-b9e816513d9e" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1_019e0416-5047-78a4-9bc0-69f29437785c" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationContingentConsiderationLiabilityMeasurementInput_019ecf7b-cd6d-73d7-a571-35a43839a109" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessCombinationContingentConsiderationLiabilityMeasurementInput"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfWarrantOrRightLineItems_019e0416-5047-784a-9ab4-b9e816513d9e" xlink:to="loc_us-gaap_BusinessCombinationContingentConsiderationLiabilityMeasurementInput_019ecf7b-cd6d-73d7-a571-35a43839a109" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.jobyaviation.com/role/CommitmentsandContingenciesScheduleofUnfulfilledObligationsDetails" xlink:type="simple" xlink:href="joby-20260630.xsd#CommitmentsandContingenciesScheduleofUnfulfilledObligationsDetails"/>
  <link:definitionLink xlink:role="http://www.jobyaviation.com/role/CommitmentsandContingenciesScheduleofUnfulfilledObligationsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationLineItems_019ecf82-35be-7e5c-a9ad-4da0008b9d0f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_UnrecordedUnconditionalPurchaseObligationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationTable_019ecf82-35be-76bd-b9c4-57d8c15720c5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_UnrecordedUnconditionalPurchaseObligationTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationLineItems_019ecf82-35be-7e5c-a9ad-4da0008b9d0f" xlink:to="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationTable_019ecf82-35be-76bd-b9c4-57d8c15720c5" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchasedAxis_019ecf82-35be-75ba-a56a-9e0f1201d616" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchasedAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationTable_019ecf82-35be-76bd-b9c4-57d8c15720c5" xlink:to="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchasedAxis_019ecf82-35be-75ba-a56a-9e0f1201d616" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnconditionalPurchaseObligationCategoryOfGoodsOrServicesAcquiredDomain_019ecf82-35be-75ba-a56a-9e0f1201d616_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_UnconditionalPurchaseObligationCategoryOfGoodsOrServicesAcquiredDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchasedAxis_019ecf82-35be-75ba-a56a-9e0f1201d616" xlink:to="loc_us-gaap_UnconditionalPurchaseObligationCategoryOfGoodsOrServicesAcquiredDomain_019ecf82-35be-75ba-a56a-9e0f1201d616_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnconditionalPurchaseObligationCategoryOfGoodsOrServicesAcquiredDomain_019ecf82-35be-7ce9-8120-79f3c2b22f41" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_UnconditionalPurchaseObligationCategoryOfGoodsOrServicesAcquiredDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchasedAxis_019ecf82-35be-75ba-a56a-9e0f1201d616" xlink:to="loc_us-gaap_UnconditionalPurchaseObligationCategoryOfGoodsOrServicesAcquiredDomain_019ecf82-35be-7ce9-8120-79f3c2b22f41" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AirlineCapacityPurchaseArrangementsMember_019ecf82-69a4-7262-a64b-0b28eb493062" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AirlineCapacityPurchaseArrangementsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_UnconditionalPurchaseObligationCategoryOfGoodsOrServicesAcquiredDomain_019ecf82-35be-7ce9-8120-79f3c2b22f41" xlink:to="loc_us-gaap_AirlineCapacityPurchaseArrangementsMember_019ecf82-69a4-7262-a64b-0b28eb493062" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationDueInRemainderOfFiscalYear_019ecf82-35be-7894-b025-8285ebc54386" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_UnrecordedUnconditionalPurchaseObligationDueInRemainderOfFiscalYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationLineItems_019ecf82-35be-7e5c-a9ad-4da0008b9d0f" xlink:to="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationDueInRemainderOfFiscalYear_019ecf82-35be-7894-b025-8285ebc54386" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceOnFirstAnniversary_019ecf82-ae5a-74f1-bccd-811608c5e68d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceOnFirstAnniversary"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationLineItems_019ecf82-35be-7e5c-a9ad-4da0008b9d0f" xlink:to="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceOnFirstAnniversary_019ecf82-ae5a-74f1-bccd-811608c5e68d" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.jobyaviation.com/role/StockholdersEquityDetails" xlink:type="simple" xlink:href="joby-20260630.xsd#StockholdersEquityDetails"/>
  <link:definitionLink xlink:role="http://www.jobyaviation.com/role/StockholdersEquityDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockLineItems_019ecf87-5297-7d8e-ba5f-e3f6b44528fd" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ClassOfStockLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfStockByClassTable_019ecf87-5297-7cdc-949c-19cc9adf6bbf" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfStockByClassTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ClassOfStockLineItems_019ecf87-5297-7d8e-ba5f-e3f6b44528fd" xlink:to="loc_us-gaap_ScheduleOfStockByClassTable_019ecf87-5297-7cdc-949c-19cc9adf6bbf" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsidiarySaleOfStockAxis_019ecf8a-fa7b-7a46-91e0-ff44bf70e166" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SubsidiarySaleOfStockAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfStockByClassTable_019ecf87-5297-7cdc-949c-19cc9adf6bbf" xlink:to="loc_us-gaap_SubsidiarySaleOfStockAxis_019ecf8a-fa7b-7a46-91e0-ff44bf70e166" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SaleOfStockNameOfTransactionDomain_019ecf8a-fa7b-7a46-91e0-ff44bf70e166_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SaleOfStockNameOfTransactionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_SubsidiarySaleOfStockAxis_019ecf8a-fa7b-7a46-91e0-ff44bf70e166" xlink:to="loc_us-gaap_SaleOfStockNameOfTransactionDomain_019ecf8a-fa7b-7a46-91e0-ff44bf70e166_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SaleOfStockNameOfTransactionDomain_019ecf8a-fa7b-732b-a534-6ca4abdfe744" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SaleOfStockNameOfTransactionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_SubsidiarySaleOfStockAxis_019ecf8a-fa7b-7a46-91e0-ff44bf70e166" xlink:to="loc_us-gaap_SaleOfStockNameOfTransactionDomain_019ecf8a-fa7b-732b-a534-6ca4abdfe744" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_joby_PublicStockOfferingMember_019ecf8b-7c9b-72aa-9eed-c9e85389ab6c" xlink:href="joby-20260630.xsd#joby_PublicStockOfferingMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SaleOfStockNameOfTransactionDomain_019ecf8a-fa7b-732b-a534-6ca4abdfe744" xlink:to="loc_joby_PublicStockOfferingMember_019ecf8b-7c9b-72aa-9eed-c9e85389ab6c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OverAllotmentOptionMember_019ecf8b-e2f9-774a-a212-fab6da0ce8f7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OverAllotmentOptionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SaleOfStockNameOfTransactionDomain_019ecf8a-fa7b-732b-a534-6ca4abdfe744" xlink:to="loc_us-gaap_OverAllotmentOptionMember_019ecf8b-e2f9-774a-a212-fab6da0ce8f7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_joby_AdditionalPublicStockOfferingMember_019ecf8c-737a-728d-9b41-a3b6a94ea86e" xlink:href="joby-20260630.xsd#joby_AdditionalPublicStockOfferingMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SaleOfStockNameOfTransactionDomain_019ecf8a-fa7b-732b-a534-6ca4abdfe744" xlink:to="loc_joby_AdditionalPublicStockOfferingMember_019ecf8c-737a-728d-9b41-a3b6a94ea86e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_019ecf8d-48c0-716f-a00a-dc97d82dd6e4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfStockByClassTable_019ecf87-5297-7cdc-949c-19cc9adf6bbf" xlink:to="loc_us-gaap_DebtInstrumentAxis_019ecf8d-48c0-716f-a00a-dc97d82dd6e4" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019ecf8d-48c0-716f-a00a-dc97d82dd6e4_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_019ecf8d-48c0-716f-a00a-dc97d82dd6e4" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019ecf8d-48c0-716f-a00a-dc97d82dd6e4_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019ecf8d-48c0-792c-a589-8667e18abae7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_019ecf8d-48c0-716f-a00a-dc97d82dd6e4" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019ecf8d-48c0-792c-a589-8667e18abae7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_joby_ConvertibleSeniorNotesDue2032Member_019ecf8d-48c0-7998-950e-20ea1caa1f68" xlink:href="joby-20260630.xsd#joby_ConvertibleSeniorNotesDue2032Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019ecf8d-48c0-792c-a589-8667e18abae7" xlink:to="loc_joby_ConvertibleSeniorNotesDue2032Member_019ecf8d-48c0-7998-950e-20ea1caa1f68" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_019ecf8d-48c0-764d-a391-d953f5a6d457" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfStockByClassTable_019ecf87-5297-7cdc-949c-19cc9adf6bbf" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_019ecf8d-48c0-764d-a391-d953f5a6d457" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019ecf8d-48c0-764d-a391-d953f5a6d457_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_019ecf8d-48c0-764d-a391-d953f5a6d457" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019ecf8d-48c0-764d-a391-d953f5a6d457_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019ecf8d-48c0-7280-9dd6-eac23dc6e3fb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_019ecf8d-48c0-764d-a391-d953f5a6d457" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019ecf8d-48c0-7280-9dd6-eac23dc6e3fb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConvertibleDebtMember_019ecf8d-48c0-7d97-9c92-86e8e531d4d6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ConvertibleDebtMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_019ecf8d-48c0-7280-9dd6-eac23dc6e3fb" xlink:to="loc_us-gaap_ConvertibleDebtMember_019ecf8d-48c0-7d97-9c92-86e8e531d4d6" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction_019ecf87-5297-7766-98d4-2dc3ee980e51" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_019ecf87-5297-7d8e-ba5f-e3f6b44528fd" xlink:to="loc_us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction_019ecf87-5297-7766-98d4-2dc3ee980e51" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SaleOfStockPricePerShare_019ecf87-b466-782c-85eb-37a28b46bbc6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SaleOfStockPricePerShare"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_019ecf87-5297-7d8e-ba5f-e3f6b44528fd" xlink:to="loc_us-gaap_SaleOfStockPricePerShare_019ecf87-b466-782c-85eb-37a28b46bbc6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SaleOfStockConsiderationReceivedOnTransaction_019ecf88-1732-7338-8426-9ef8cc966e5a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SaleOfStockConsiderationReceivedOnTransaction"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_019ecf87-5297-7d8e-ba5f-e3f6b44528fd" xlink:to="loc_us-gaap_SaleOfStockConsiderationReceivedOnTransaction_019ecf88-1732-7338-8426-9ef8cc966e5a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_joby_SaleOfStockOverAllotmentOptionPeriod_019ecf88-5755-7cc4-8587-50d8050a853a" xlink:href="joby-20260630.xsd#joby_SaleOfStockOverAllotmentOptionPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_019ecf87-5297-7d8e-ba5f-e3f6b44528fd" xlink:to="loc_joby_SaleOfStockOverAllotmentOptionPeriod_019ecf88-5755-7cc4-8587-50d8050a853a" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_joby_DebtInstrumentConvertibleCappedCallTransaction_019ecf89-1986-796a-a3c1-b883f3b24f98" xlink:href="joby-20260630.xsd#joby_DebtInstrumentConvertibleCappedCallTransaction"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_019ecf87-5297-7d8e-ba5f-e3f6b44528fd" xlink:to="loc_joby_DebtInstrumentConvertibleCappedCallTransaction_019ecf89-1986-796a-a3c1-b883f3b24f98" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentConvertibleNumberOfEquityInstruments_019ecf89-54e2-7670-a61f-ddcd9101c2f3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentConvertibleNumberOfEquityInstruments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_019ecf87-5297-7d8e-ba5f-e3f6b44528fd" xlink:to="loc_us-gaap_DebtInstrumentConvertibleNumberOfEquityInstruments_019ecf89-54e2-7670-a61f-ddcd9101c2f3" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentConvertibleConversionPrice1_019ecf89-bbdf-750c-96b5-d48c023ffdfa" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentConvertibleConversionPrice1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_019ecf87-5297-7d8e-ba5f-e3f6b44528fd" xlink:to="loc_us-gaap_DebtInstrumentConvertibleConversionPrice1_019ecf89-bbdf-750c-96b5-d48c023ffdfa" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_joby_DebtInstrumentConvertibleCapConversionPrice_019ecf89-f9c0-7d6c-987e-34d29dfdd0dd" xlink:href="joby-20260630.xsd#joby_DebtInstrumentConvertibleCapConversionPrice"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_019ecf87-5297-7d8e-ba5f-e3f6b44528fd" xlink:to="loc_joby_DebtInstrumentConvertibleCapConversionPrice_019ecf89-f9c0-7d6c-987e-34d29dfdd0dd" xlink:type="arc" order="7"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.jobyaviation.com/role/RevenueScheduleofDisaggregatedRevenueDetails" xlink:type="simple" xlink:href="joby-20260630.xsd#RevenueScheduleofDisaggregatedRevenueDetails"/>
  <link:definitionLink xlink:role="http://www.jobyaviation.com/role/RevenueScheduleofDisaggregatedRevenueDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueLineItems_019eeea1-55a2-7859-b02b-76b69be714ac" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DisaggregationOfRevenueLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueTable_019eeea1-55a2-70ce-8f49-3037f70d1c25" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DisaggregationOfRevenueTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_019eeea1-55a2-7859-b02b-76b69be714ac" xlink:to="loc_us-gaap_DisaggregationOfRevenueTable_019eeea1-55a2-70ce-8f49-3037f70d1c25" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_019eeea1-9a41-7ee2-9f33-a856a78f100c" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_019eeea1-55a2-70ce-8f49-3037f70d1c25" xlink:to="loc_srt_ProductOrServiceAxis_019eeea1-9a41-7ee2-9f33-a856a78f100c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_019eeea1-9a41-7ee2-9f33-a856a78f100c_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_019eeea1-9a41-7ee2-9f33-a856a78f100c" xlink:to="loc_srt_ProductsAndServicesDomain_019eeea1-9a41-7ee2-9f33-a856a78f100c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_019eeea1-9a41-7f91-bbfd-c4049f540d7a" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_019eeea1-9a41-7ee2-9f33-a856a78f100c" xlink:to="loc_srt_ProductsAndServicesDomain_019eeea1-9a41-7f91-bbfd-c4049f540d7a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PassengerMember_019eeea1-ea2b-78a5-aff1-78762f5e76b8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PassengerMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_019eeea1-9a41-7f91-bbfd-c4049f540d7a" xlink:to="loc_us-gaap_PassengerMember_019eeea1-ea2b-78a5-aff1-78762f5e76b8" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProductAndServiceOtherMember_019eeea2-566e-7384-8451-54322363d241" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ProductAndServiceOtherMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_019eeea1-9a41-7f91-bbfd-c4049f540d7a" xlink:to="loc_us-gaap_ProductAndServiceOtherMember_019eeea2-566e-7384-8451-54322363d241" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_019eeea1-55a2-77ab-832d-77a69d9a9ee3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_019eeea1-55a2-7859-b02b-76b69be714ac" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_019eeea1-55a2-77ab-832d-77a69d9a9ee3" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.jobyaviation.com/role/StockbasedCompensationAdditionalInformationDetails" xlink:type="simple" xlink:href="joby-20260630.xsd#StockbasedCompensationAdditionalInformationDetails"/>
  <link:definitionLink xlink:role="http://www.jobyaviation.com/role/StockbasedCompensationAdditionalInformationDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019e0416-5047-7c61-b1c1-55b54608241b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019e0416-5047-726a-9770-641faa62796e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019e0416-5047-7c61-b1c1-55b54608241b" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019e0416-5047-726a-9770-641faa62796e" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameAxis_019e0416-5047-7af1-affe-399fec69a4a7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PlanNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019e0416-5047-726a-9770-641faa62796e" xlink:to="loc_us-gaap_PlanNameAxis_019e0416-5047-7af1-affe-399fec69a4a7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_019e0416-5047-7af1-affe-399fec69a4a7_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PlanNameAxis_019e0416-5047-7af1-affe-399fec69a4a7" xlink:to="loc_us-gaap_PlanNameDomain_019e0416-5047-7af1-affe-399fec69a4a7_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_019e0416-5047-7bbe-9a51-7770c0532985" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PlanNameAxis_019e0416-5047-7af1-affe-399fec69a4a7" xlink:to="loc_us-gaap_PlanNameDomain_019e0416-5047-7bbe-9a51-7770c0532985" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_joby_TwoThousandAndSixteenStockOptionAndGrantPlanMember_019e0416-5047-743e-92d6-44ad4de40b67" xlink:href="joby-20260630.xsd#joby_TwoThousandAndSixteenStockOptionAndGrantPlanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanNameDomain_019e0416-5047-7bbe-9a51-7770c0532985" xlink:to="loc_joby_TwoThousandAndSixteenStockOptionAndGrantPlanMember_019e0416-5047-743e-92d6-44ad4de40b67" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_joby_EquityIncentivePlanTwoThousandTwentyOnePlanMember_019e0416-5047-761d-8f6c-da9d0eccfb77" xlink:href="joby-20260630.xsd#joby_EquityIncentivePlanTwoThousandTwentyOnePlanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanNameDomain_019e0416-5047-7bbe-9a51-7770c0532985" xlink:to="loc_joby_EquityIncentivePlanTwoThousandTwentyOnePlanMember_019e0416-5047-761d-8f6c-da9d0eccfb77" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GranteeStatusAxis_019e0416-5047-7fba-89fb-60a9003a55c5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_GranteeStatusAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019e0416-5047-726a-9770-641faa62796e" xlink:to="loc_us-gaap_GranteeStatusAxis_019e0416-5047-7fba-89fb-60a9003a55c5" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GranteeStatusDomain_019e0416-5047-7fba-89fb-60a9003a55c5_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_GranteeStatusDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_GranteeStatusAxis_019e0416-5047-7fba-89fb-60a9003a55c5" xlink:to="loc_us-gaap_GranteeStatusDomain_019e0416-5047-7fba-89fb-60a9003a55c5_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GranteeStatusDomain_019e0416-5047-7a30-95c0-5ff2323421c8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_GranteeStatusDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_GranteeStatusAxis_019e0416-5047-7fba-89fb-60a9003a55c5" xlink:to="loc_us-gaap_GranteeStatusDomain_019e0416-5047-7a30-95c0-5ff2323421c8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_joby_GranteeOwnsTenPercentOfVotingRightsMember_019e0416-5047-78aa-a75b-65370d1cbc8c" xlink:href="joby-20260630.xsd#joby_GranteeOwnsTenPercentOfVotingRightsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GranteeStatusDomain_019e0416-5047-7a30-95c0-5ff2323421c8" xlink:to="loc_joby_GranteeOwnsTenPercentOfVotingRightsMember_019e0416-5047-78aa-a75b-65370d1cbc8c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_joby_NewHiresMember_019fb8ac-2380-7312-b2ce-4f0247a78a48" xlink:href="joby-20260630.xsd#joby_NewHiresMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GranteeStatusDomain_019e0416-5047-7a30-95c0-5ff2323421c8" xlink:to="loc_joby_NewHiresMember_019fb8ac-2380-7312-b2ce-4f0247a78a48" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_joby_ExistingEmployeesMember_019fb8ac-4c39-77a9-b6d7-941231463585" xlink:href="joby-20260630.xsd#joby_ExistingEmployeesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GranteeStatusDomain_019e0416-5047-7a30-95c0-5ff2323421c8" xlink:to="loc_joby_ExistingEmployeesMember_019fb8ac-4c39-77a9-b6d7-941231463585" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_019e0416-5047-7601-aad1-bd653b852370" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019e0416-5047-726a-9770-641faa62796e" xlink:to="loc_us-gaap_AwardTypeAxis_019e0416-5047-7601-aad1-bd653b852370" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019e0416-5047-7601-aad1-bd653b852370_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_019e0416-5047-7601-aad1-bd653b852370" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019e0416-5047-7601-aad1-bd653b852370_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019e0416-5047-737c-b50a-6ae9fc4cafd1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_019e0416-5047-7601-aad1-bd653b852370" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019e0416-5047-737c-b50a-6ae9fc4cafd1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_joby_IncentiveStockOptionsMember_019e0416-5047-7327-8398-bc21a81fb4ea" xlink:href="joby-20260630.xsd#joby_IncentiveStockOptionsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019e0416-5047-737c-b50a-6ae9fc4cafd1" xlink:to="loc_joby_IncentiveStockOptionsMember_019e0416-5047-7327-8398-bc21a81fb4ea" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedStockUnitsRSUMember_019e0416-5047-7302-a807-0351c560ba7e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RestrictedStockUnitsRSUMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019e0416-5047-737c-b50a-6ae9fc4cafd1" xlink:to="loc_us-gaap_RestrictedStockUnitsRSUMember_019e0416-5047-7302-a807-0351c560ba7e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PerformanceSharesMember_019e0416-5047-7a2e-9177-722d42a6b829" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PerformanceSharesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019e0416-5047-737c-b50a-6ae9fc4cafd1" xlink:to="loc_us-gaap_PerformanceSharesMember_019e0416-5047-7a2e-9177-722d42a6b829" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeStockMember_019e0416-5047-7236-8d56-bc03bcbc5c3e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EmployeeStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019e0416-5047-737c-b50a-6ae9fc4cafd1" xlink:to="loc_us-gaap_EmployeeStockMember_019e0416-5047-7236-8d56-bc03bcbc5c3e" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeStockOptionMember_019e0416-5047-7e3b-9f20-513615fa7a05" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EmployeeStockOptionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019e0416-5047-737c-b50a-6ae9fc4cafd1" xlink:to="loc_us-gaap_EmployeeStockOptionMember_019e0416-5047-7e3b-9f20-513615fa7a05" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_joby_OtherStockBasedAwardsMember_019e0416-5047-7093-ab45-026670fedf5a" xlink:href="joby-20260630.xsd#joby_OtherStockBasedAwardsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019e0416-5047-737c-b50a-6ae9fc4cafd1" xlink:to="loc_joby_OtherStockBasedAwardsMember_019e0416-5047-7093-ab45-026670fedf5a" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementClassOfStockAxis_019e0416-5047-71f3-968f-c8bb96e72d50" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementClassOfStockAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019e0416-5047-726a-9770-641faa62796e" xlink:to="loc_us-gaap_StatementClassOfStockAxis_019e0416-5047-71f3-968f-c8bb96e72d50" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_019e0416-5047-71f3-968f-c8bb96e72d50_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementClassOfStockAxis_019e0416-5047-71f3-968f-c8bb96e72d50" xlink:to="loc_us-gaap_ClassOfStockDomain_019e0416-5047-71f3-968f-c8bb96e72d50_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_019e0416-5047-788e-b4b7-65fd6a6b3459" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementClassOfStockAxis_019e0416-5047-71f3-968f-c8bb96e72d50" xlink:to="loc_us-gaap_ClassOfStockDomain_019e0416-5047-788e-b4b7-65fd6a6b3459" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_joby_LegacyJobyPreferredStockMember_019f174f-acac-77b4-bd6f-3c2593e997fc" xlink:href="joby-20260630.xsd#joby_LegacyJobyPreferredStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_019e0416-5047-788e-b4b7-65fd6a6b3459" xlink:to="loc_joby_LegacyJobyPreferredStockMember_019f174f-acac-77b4-bd6f-3c2593e997fc" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_019e0416-5047-7ad3-a049-2db83da76710" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019e0416-5047-726a-9770-641faa62796e" xlink:to="loc_srt_RangeAxis_019e0416-5047-7ad3-a049-2db83da76710" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019e0416-5047-7ad3-a049-2db83da76710_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_019e0416-5047-7ad3-a049-2db83da76710" xlink:to="loc_srt_RangeMember_019e0416-5047-7ad3-a049-2db83da76710_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019e0416-5047-72f4-8dbb-63c17b98b70a" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_019e0416-5047-7ad3-a049-2db83da76710" xlink:to="loc_srt_RangeMember_019e0416-5047-72f4-8dbb-63c17b98b70a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_019e0416-5047-78a3-beed-008ae806c439" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_019e0416-5047-72f4-8dbb-63c17b98b70a" xlink:to="loc_srt_MaximumMember_019e0416-5047-78a3-beed-008ae806c439" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_joby_ContractualTermOfOptions_019e0416-5047-7deb-950a-e3ef8b167de7" xlink:href="joby-20260630.xsd#joby_ContractualTermOfOptions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019e0416-5047-7c61-b1c1-55b54608241b" xlink:to="loc_joby_ContractualTermOfOptions_019e0416-5047-7deb-950a-e3ef8b167de7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_019e0416-5047-7133-acf4-d160c87ea5f5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019e0416-5047-7c61-b1c1-55b54608241b" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_019e0416-5047-7133-acf4-d160c87ea5f5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_joby_AwardCliffOffPeriod_019e0416-5047-7559-9ddd-c7649396ca7c" xlink:href="joby-20260630.xsd#joby_AwardCliffOffPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019e0416-5047-7c61-b1c1-55b54608241b" xlink:to="loc_joby_AwardCliffOffPeriod_019e0416-5047-7559-9ddd-c7649396ca7c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_joby_PercentageOfShareholdingByGrantee_019e0416-5047-7c9a-b760-7a5abafa111a" xlink:href="joby-20260630.xsd#joby_PercentageOfShareholdingByGrantee"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019e0416-5047-7c61-b1c1-55b54608241b" xlink:to="loc_joby_PercentageOfShareholdingByGrantee_019e0416-5047-7c9a-b760-7a5abafa111a" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_joby_PercentageOfStockholdersOnExercisePriceOfOptionGranted_019e0416-5047-74c1-8e22-f44cda1f54dc" xlink:href="joby-20260630.xsd#joby_PercentageOfStockholdersOnExercisePriceOfOptionGranted"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019e0416-5047-7c61-b1c1-55b54608241b" xlink:to="loc_joby_PercentageOfStockholdersOnExercisePriceOfOptionGranted_019e0416-5047-74c1-8e22-f44cda1f54dc" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardPurchasePriceOfCommonStockPercent_019e0416-5047-70d4-940f-8a58adb5c10e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardPurchasePriceOfCommonStockPercent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019e0416-5047-7c61-b1c1-55b54608241b" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardPurchasePriceOfCommonStockPercent_019e0416-5047-70d4-940f-8a58adb5c10e" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_joby_PercentageOfShareOutstanding_019e0416-5047-7198-9771-e2ed040e4dbe" xlink:href="joby-20260630.xsd#joby_PercentageOfShareOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019e0416-5047-7c61-b1c1-55b54608241b" xlink:to="loc_joby_PercentageOfShareOutstanding_019e0416-5047-7198-9771-e2ed040e4dbe" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfAdditionalSharesAuthorized_019e0416-5047-7b7e-81b8-e3c2bc1029e4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfAdditionalSharesAuthorized"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019e0416-5047-7c61-b1c1-55b54608241b" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfAdditionalSharesAuthorized_019e0416-5047-7b7e-81b8-e3c2bc1029e4" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue_019e0416-5047-7a8f-ab7d-7c351c8dc596" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019e0416-5047-7c61-b1c1-55b54608241b" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue_019e0416-5047-7a8f-ab7d-7c351c8dc596" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_joby_ShareBasedCompensationArrangementRestrictedStockUnitMaximumPotentialConversionRatio_019e0416-5047-7215-a714-de7aeb7df7b4" xlink:href="joby-20260630.xsd#joby_ShareBasedCompensationArrangementRestrictedStockUnitMaximumPotentialConversionRatio"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019e0416-5047-7c61-b1c1-55b54608241b" xlink:to="loc_joby_ShareBasedCompensationArrangementRestrictedStockUnitMaximumPotentialConversionRatio_019e0416-5047-7215-a714-de7aeb7df7b4" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_joby_ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumEarnedPercentage_019e0416-5047-74c6-9369-e8169b9a82ab" xlink:href="joby-20260630.xsd#joby_ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumEarnedPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019e0416-5047-7c61-b1c1-55b54608241b" xlink:to="loc_joby_ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumEarnedPercentage_019e0416-5047-74c6-9369-e8169b9a82ab" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_joby_ShareBasedCompensationArrangementByShareBasedPaymentAwardMinimumEarnedPercentage_019e0416-5047-7954-beb5-32eb15a7deec" xlink:href="joby-20260630.xsd#joby_ShareBasedCompensationArrangementByShareBasedPaymentAwardMinimumEarnedPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019e0416-5047-7c61-b1c1-55b54608241b" xlink:to="loc_joby_ShareBasedCompensationArrangementByShareBasedPaymentAwardMinimumEarnedPercentage_019e0416-5047-7954-beb5-32eb15a7deec" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_joby_ShareBasedCompensationArrangementByShareBasedPaymentAwardTargetEarnedPercentage_019e0416-5047-7fd7-8b6d-04af2ab5720c" xlink:href="joby-20260630.xsd#joby_ShareBasedCompensationArrangementByShareBasedPaymentAwardTargetEarnedPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019e0416-5047-7c61-b1c1-55b54608241b" xlink:to="loc_joby_ShareBasedCompensationArrangementByShareBasedPaymentAwardTargetEarnedPercentage_019e0416-5047-7fd7-8b6d-04af2ab5720c" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_joby_ShareBasedCompensationArrangementByShareBasedPaymentAwardShareConversionRatio_019e0416-5047-7baf-ae1e-59c0b207d546" xlink:href="joby-20260630.xsd#joby_ShareBasedCompensationArrangementByShareBasedPaymentAwardShareConversionRatio"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019e0416-5047-7c61-b1c1-55b54608241b" xlink:to="loc_joby_ShareBasedCompensationArrangementByShareBasedPaymentAwardShareConversionRatio_019e0416-5047-7baf-ae1e-59c0b207d546" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_joby_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfPerformanceGoals_019eeea8-8dcf-7840-9361-a41d18a5eba5" xlink:href="joby-20260630.xsd#joby_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfPerformanceGoals"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019e0416-5047-7c61-b1c1-55b54608241b" xlink:to="loc_joby_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfPerformanceGoals_019eeea8-8dcf-7840-9361-a41d18a5eba5" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_joby_ShareBasedPaymentArrangementByShareBasedPaymentAwardNumberOfAwardInstallments_019e0416-5047-7b91-97ff-ace4949ce1a1" xlink:href="joby-20260630.xsd#joby_ShareBasedPaymentArrangementByShareBasedPaymentAwardNumberOfAwardInstallments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019e0416-5047-7c61-b1c1-55b54608241b" xlink:to="loc_joby_ShareBasedPaymentArrangementByShareBasedPaymentAwardNumberOfAwardInstallments_019e0416-5047-7b91-97ff-ace4949ce1a1" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_joby_PercentageOfShareOutstandingYearlyIncrease_019e0416-5047-7512-bdf2-f7b30cb2dd94" xlink:href="joby-20260630.xsd#joby_PercentageOfShareOutstandingYearlyIncrease"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019e0416-5047-7c61-b1c1-55b54608241b" xlink:to="loc_joby_PercentageOfShareOutstandingYearlyIncrease_019e0416-5047-7512-bdf2-f7b30cb2dd94" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationEstimatedQuantityOfSharesToBeRepurchasedInFollowingPeriod_019e0416-5047-7879-9d69-d1fdde236380" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EmployeeServiceShareBasedCompensationEstimatedQuantityOfSharesToBeRepurchasedInFollowingPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019e0416-5047-7c61-b1c1-55b54608241b" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationEstimatedQuantityOfSharesToBeRepurchasedInFollowingPeriod_019e0416-5047-7879-9d69-d1fdde236380" xlink:type="arc" order="17"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardPerShareWeightedAveragePriceOfSharesPurchased_019e0416-5047-7065-8623-cb007b29778e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardPerShareWeightedAveragePriceOfSharesPurchased"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019e0416-5047-7c61-b1c1-55b54608241b" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardPerShareWeightedAveragePriceOfSharesPurchased_019e0416-5047-7065-8623-cb007b29778e" xlink:type="arc" order="18"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsPayableAndAccruedLiabilitiesNoncurrent_019e0416-5047-7457-b708-1719510141b1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AccountsPayableAndAccruedLiabilitiesNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019e0416-5047-7c61-b1c1-55b54608241b" xlink:to="loc_us-gaap_AccountsPayableAndAccruedLiabilitiesNoncurrent_019e0416-5047-7457-b708-1719510141b1" xlink:type="arc" order="19"/>
    <link:loc xlink:type="locator" xlink:label="loc_joby_PaymentsForAdvisoryServicesShares_019e0416-5047-7463-8f68-9c1b453ae878" xlink:href="joby-20260630.xsd#joby_PaymentsForAdvisoryServicesShares"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019e0416-5047-7c61-b1c1-55b54608241b" xlink:to="loc_joby_PaymentsForAdvisoryServicesShares_019e0416-5047-7463-8f68-9c1b453ae878" xlink:type="arc" order="20"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesToBeRepurchasedNextYear_019e0416-5047-7740-9beb-fad2b27f96b3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesToBeRepurchasedNextYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019e0416-5047-7c61-b1c1-55b54608241b" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesToBeRepurchasedNextYear_019e0416-5047-7740-9beb-fad2b27f96b3" xlink:type="arc" order="21"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.jobyaviation.com/role/StockbasedCompensationScheduleofNonvestedRestrictedStockUnitsActivityDetails" xlink:type="simple" xlink:href="joby-20260630.xsd#StockbasedCompensationScheduleofNonvestedRestrictedStockUnitsActivityDetails"/>
  <link:definitionLink xlink:role="http://www.jobyaviation.com/role/StockbasedCompensationScheduleofNonvestedRestrictedStockUnitsActivityDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019e0416-5047-76e8-8075-3dcdbfca760c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019e0416-5047-7448-bb38-a8bdf742e56b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019e0416-5047-76e8-8075-3dcdbfca760c" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019e0416-5047-7448-bb38-a8bdf742e56b" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_019e0416-5047-7e17-b99a-c98dd339dab8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019e0416-5047-7448-bb38-a8bdf742e56b" xlink:to="loc_us-gaap_AwardTypeAxis_019e0416-5047-7e17-b99a-c98dd339dab8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019e0416-5047-7e17-b99a-c98dd339dab8_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_019e0416-5047-7e17-b99a-c98dd339dab8" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019e0416-5047-7e17-b99a-c98dd339dab8_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019e0416-5047-7556-a099-767564992b25" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_019e0416-5047-7e17-b99a-c98dd339dab8" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019e0416-5047-7556-a099-767564992b25" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedStockUnitsRSUMember_019e0416-5047-74cb-83e0-3baa503a05f2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RestrictedStockUnitsRSUMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019e0416-5047-7556-a099-767564992b25" xlink:to="loc_us-gaap_RestrictedStockUnitsRSUMember_019e0416-5047-74cb-83e0-3baa503a05f2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_019e0416-5047-764f-a1a7-a2083e2ee9c5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019e0416-5047-76e8-8075-3dcdbfca760c" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_019e0416-5047-764f-a1a7-a2083e2ee9c5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_019e0416-5047-7bc6-b21e-ba2272442613" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_019e0416-5047-764f-a1a7-a2083e2ee9c5" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_019e0416-5047-7bc6-b21e-ba2272442613" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_019e0416-5047-7cda-9512-95ccee1dd14f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_019e0416-5047-764f-a1a7-a2083e2ee9c5" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_019e0416-5047-7cda-9512-95ccee1dd14f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_019e0416-5047-7989-8451-598abf8915e3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_019e0416-5047-764f-a1a7-a2083e2ee9c5" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_019e0416-5047-7989-8451-598abf8915e3" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_019e0416-5047-7a2b-a1a8-425f8bc136b0" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_019e0416-5047-764f-a1a7-a2083e2ee9c5" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_019e0416-5047-7a2b-a1a8-425f8bc136b0" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_019e0416-5047-7dad-8f1c-3e4bd7e0e764" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_019e0416-5047-76d8-b4a2-caf239e2c296" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019e0416-5047-76e8-8075-3dcdbfca760c" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_019e0416-5047-76d8-b4a2-caf239e2c296" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_019e0416-5047-7d4a-a44a-af678934d5f6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_019e0416-5047-76d8-b4a2-caf239e2c296" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_019e0416-5047-7d4a-a44a-af678934d5f6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_019e0416-5047-721f-8b83-90caf18ae130" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_019e0416-5047-76d8-b4a2-caf239e2c296" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_019e0416-5047-721f-8b83-90caf18ae130" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_019e0416-5047-79ac-ab60-867ef714068e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_019e0416-5047-76d8-b4a2-caf239e2c296" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_019e0416-5047-79ac-ab60-867ef714068e" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_019e0416-5047-7706-ba2a-08fc2bb8a0a4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_019e0416-5047-76d8-b4a2-caf239e2c296" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_019e0416-5047-7706-ba2a-08fc2bb8a0a4" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_019e0416-5047-7fc5-b696-fda9fc4108c1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueOutstanding_019e0416-5047-7171-8f71-7458b4d68e76" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019e0416-5047-76e8-8075-3dcdbfca760c" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueOutstanding_019e0416-5047-7171-8f71-7458b4d68e76" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.jobyaviation.com/role/StockbasedCompensationSummaryofStockBasedCompensationExpenseDetails" xlink:type="simple" xlink:href="joby-20260630.xsd#StockbasedCompensationSummaryofStockBasedCompensationExpenseDetails"/>
  <link:definitionLink xlink:role="http://www.jobyaviation.com/role/StockbasedCompensationSummaryofStockBasedCompensationExpenseDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems_019e0416-5047-7cbc-b512-fef898bddb22" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable_019e0416-5047-7df9-b6b2-623e14422473" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems_019e0416-5047-7cbc-b512-fef898bddb22" xlink:to="loc_us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable_019e0416-5047-7df9-b6b2-623e14422473" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementOfIncomeLocationBalanceAxis_019e0416-5047-7d3f-9aaf-5ee46afff395" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementOfIncomeLocationBalanceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable_019e0416-5047-7df9-b6b2-623e14422473" xlink:to="loc_us-gaap_StatementOfIncomeLocationBalanceAxis_019e0416-5047-7d3f-9aaf-5ee46afff395" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllocatedShareBasedCompensationExpense_019e0416-5047-7b30-9e67-f916f47e8d16" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AllocatedShareBasedCompensationExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems_019e0416-5047-7cbc-b512-fef898bddb22" xlink:to="loc_us-gaap_AllocatedShareBasedCompensationExpense_019e0416-5047-7b30-9e67-f916f47e8d16" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.jobyaviation.com/role/StockbasedCompensationSummaryofStockBasedCompensationExpenseDetails_1" xlink:type="simple" xlink:href="joby-20260630.xsd#StockbasedCompensationSummaryofStockBasedCompensationExpenseDetails_1"/>
  <link:definitionLink xlink:role="http://www.jobyaviation.com/role/StockbasedCompensationSummaryofStockBasedCompensationExpenseDetails_1" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems_019e0416-5047-7cbc-b512-fef898bddb22" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable_019e0416-5047-7df9-b6b2-623e14422473" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems_019e0416-5047-7cbc-b512-fef898bddb22" xlink:to="loc_us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable_019e0416-5047-7df9-b6b2-623e14422473" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllocatedShareBasedCompensationExpense_019e0416-5047-7b30-9e67-f916f47e8d16" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AllocatedShareBasedCompensationExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems_019e0416-5047-7cbc-b512-fef898bddb22" xlink:to="loc_us-gaap_AllocatedShareBasedCompensationExpense_019e0416-5047-7b30-9e67-f916f47e8d16" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.jobyaviation.com/role/RelatedPartyTransactionsAdditionalInformationDetails" xlink:type="simple" xlink:href="joby-20260630.xsd#RelatedPartyTransactionsAdditionalInformationDetails"/>
  <link:definitionLink xlink:role="http://www.jobyaviation.com/role/RelatedPartyTransactionsAdditionalInformationDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionLineItems_019e0416-5047-721a-8f57-bdc012a78bcc" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RelatedPartyTransactionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_019e0416-5047-725c-b653-ca8f57c350ae" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019e0416-5047-721a-8f57-bdc012a78bcc" xlink:to="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_019e0416-5047-725c-b653-ca8f57c350ae" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionAxis_019e0416-5047-75e1-9bb5-956a9d9ca197" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RelatedPartyTransactionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_019e0416-5047-725c-b653-ca8f57c350ae" xlink:to="loc_us-gaap_RelatedPartyTransactionAxis_019e0416-5047-75e1-9bb5-956a9d9ca197" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionDomain_019e0416-5047-75e1-9bb5-956a9d9ca197_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RelatedPartyTransactionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RelatedPartyTransactionAxis_019e0416-5047-75e1-9bb5-956a9d9ca197" xlink:to="loc_us-gaap_RelatedPartyTransactionDomain_019e0416-5047-75e1-9bb5-956a9d9ca197_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionDomain_019e0416-5047-77e5-adfc-86d74c277aa6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RelatedPartyTransactionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RelatedPartyTransactionAxis_019e0416-5047-75e1-9bb5-956a9d9ca197" xlink:to="loc_us-gaap_RelatedPartyTransactionDomain_019e0416-5047-77e5-adfc-86d74c277aa6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_joby_OfficeSpaceAndCertainUtilitiesAndMaintenanceServicesMember_019e0416-5047-716f-be63-3095a711a99d" xlink:href="joby-20260630.xsd#joby_OfficeSpaceAndCertainUtilitiesAndMaintenanceServicesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionDomain_019e0416-5047-77e5-adfc-86d74c277aa6" xlink:to="loc_joby_OfficeSpaceAndCertainUtilitiesAndMaintenanceServicesMember_019e0416-5047-716f-be63-3095a711a99d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_joby_SubassemblyComponentsMember_019e0416-5047-7bb2-a5d5-d5b0c94b008f" xlink:href="joby-20260630.xsd#joby_SubassemblyComponentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionDomain_019e0416-5047-77e5-adfc-86d74c277aa6" xlink:to="loc_joby_SubassemblyComponentsMember_019e0416-5047-7bb2-a5d5-d5b0c94b008f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_joby_ToyotaStockPurchaseAgreementMember_019e0416-5047-7b1a-a46f-fb22479cb7db" xlink:href="joby-20260630.xsd#joby_ToyotaStockPurchaseAgreementMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionDomain_019e0416-5047-77e5-adfc-86d74c277aa6" xlink:to="loc_joby_ToyotaStockPurchaseAgreementMember_019e0416-5047-7b1a-a46f-fb22479cb7db" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019e0416-5047-76f0-8d59-3e1193b7664a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_019e0416-5047-725c-b653-ca8f57c350ae" xlink:to="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019e0416-5047-76f0-8d59-3e1193b7664a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_019e0416-5047-76f0-8d59-3e1193b7664a_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019e0416-5047-76f0-8d59-3e1193b7664a" xlink:to="loc_us-gaap_RelatedPartyDomain_019e0416-5047-76f0-8d59-3e1193b7664a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_019e0416-5047-7fa5-8670-90239cc06925" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019e0416-5047-76f0-8d59-3e1193b7664a" xlink:to="loc_us-gaap_RelatedPartyDomain_019e0416-5047-7fa5-8670-90239cc06925" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAffiliatesMember_019e0416-5047-7ecd-9cef-77695622d2a5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherAffiliatesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyDomain_019e0416-5047-7fa5-8670-90239cc06925" xlink:to="loc_us-gaap_OtherAffiliatesMember_019e0416-5047-7ecd-9cef-77695622d2a5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsidiarySaleOfStockAxis_019e0416-5047-727e-bf3e-eb34468a7683" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SubsidiarySaleOfStockAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_019e0416-5047-725c-b653-ca8f57c350ae" xlink:to="loc_us-gaap_SubsidiarySaleOfStockAxis_019e0416-5047-727e-bf3e-eb34468a7683" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SaleOfStockNameOfTransactionDomain_019e0416-5047-727e-bf3e-eb34468a7683_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SaleOfStockNameOfTransactionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_SubsidiarySaleOfStockAxis_019e0416-5047-727e-bf3e-eb34468a7683" xlink:to="loc_us-gaap_SaleOfStockNameOfTransactionDomain_019e0416-5047-727e-bf3e-eb34468a7683_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SaleOfStockNameOfTransactionDomain_019e0416-5047-76f5-aae7-6dfab22404ba" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SaleOfStockNameOfTransactionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_SubsidiarySaleOfStockAxis_019e0416-5047-727e-bf3e-eb34468a7683" xlink:to="loc_us-gaap_SaleOfStockNameOfTransactionDomain_019e0416-5047-76f5-aae7-6dfab22404ba" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PrivatePlacementMember_019e0416-5047-7bdb-873c-ddf902a5cafc" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PrivatePlacementMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SaleOfStockNameOfTransactionDomain_019e0416-5047-76f5-aae7-6dfab22404ba" xlink:to="loc_us-gaap_PrivatePlacementMember_019e0416-5047-7bdb-873c-ddf902a5cafc" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_019f6dbc-ab77-792a-b862-28e2718070d3" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_019e0416-5047-725c-b653-ca8f57c350ae" xlink:to="loc_dei_LegalEntityAxis_019f6dbc-ab77-792a-b862-28e2718070d3" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019f6dbc-ab77-792a-b862-28e2718070d3_default" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_019f6dbc-ab77-792a-b862-28e2718070d3" xlink:to="loc_dei_EntityDomain_019f6dbc-ab77-792a-b862-28e2718070d3_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019f6dbc-ab77-7e18-81d0-7e7b8ce3e581" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_019f6dbc-ab77-792a-b862-28e2718070d3" xlink:to="loc_dei_EntityDomain_019f6dbc-ab77-7e18-81d0-7e7b8ce3e581" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_joby_JobyAeroMember_019f6dbd-39ad-7c92-ba82-978a57eae2d4" xlink:href="joby-20260630.xsd#joby_JobyAeroMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019f6dbc-ab77-7e18-81d0-7e7b8ce3e581" xlink:to="loc_joby_JobyAeroMember_019f6dbd-39ad-7c92-ba82-978a57eae2d4" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_joby_ToyotaMember_019f6dc1-99f7-7f07-bf12-592748db7732" xlink:href="joby-20260630.xsd#joby_ToyotaMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019f6dbc-ab77-7e18-81d0-7e7b8ce3e581" xlink:to="loc_joby_ToyotaMember_019f6dc1-99f7-7f07-bf12-592748db7732" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_019fa4a5-e438-767b-892e-8433f7bb1894" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_019e0416-5047-725c-b653-ca8f57c350ae" xlink:to="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_019fa4a5-e438-767b-892e-8433f7bb1894" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_EquityMethodInvesteeNameDomain_019fa4a5-e438-767b-892e-8433f7bb1894_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_EquityMethodInvesteeNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_019fa4a5-e438-767b-892e-8433f7bb1894" xlink:to="loc_srt_EquityMethodInvesteeNameDomain_019fa4a5-e438-767b-892e-8433f7bb1894_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_EquityMethodInvesteeNameDomain_019fa4a5-e438-72b1-abc0-5a6fd6165bbb" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_EquityMethodInvesteeNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_019fa4a5-e438-767b-892e-8433f7bb1894" xlink:to="loc_srt_EquityMethodInvesteeNameDomain_019fa4a5-e438-72b1-abc0-5a6fd6165bbb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_joby_JTAMPCMember_019fa4a6-0252-75fa-9ab6-c215a2fbc908" xlink:href="joby-20260630.xsd#joby_JTAMPCMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_EquityMethodInvesteeNameDomain_019fa4a5-e438-72b1-abc0-5a6fd6165bbb" xlink:to="loc_joby_JTAMPCMember_019fa4a6-0252-75fa-9ab6-c215a2fbc908" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionAmountsOfTransaction_019e0416-5047-7999-8f48-6dc4fb5f9295" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RelatedPartyTransactionAmountsOfTransaction"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019e0416-5047-721a-8f57-bdc012a78bcc" xlink:to="loc_us-gaap_RelatedPartyTransactionAmountsOfTransaction_019e0416-5047-7999-8f48-6dc4fb5f9295" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsPayableCurrent_019eeebe-efa7-7b5d-8e10-29bf1eae70aa" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AccountsPayableCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019e0416-5047-721a-8f57-bdc012a78bcc" xlink:to="loc_us-gaap_AccountsPayableCurrent_019eeebe-efa7-7b5d-8e10-29bf1eae70aa" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_joby_RelatedPartyTransactionBeneficialOwnerPercentage_019e0416-5047-70a2-a3b4-8196aa43a716" xlink:href="joby-20260630.xsd#joby_RelatedPartyTransactionBeneficialOwnerPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019e0416-5047-721a-8f57-bdc012a78bcc" xlink:to="loc_joby_RelatedPartyTransactionBeneficialOwnerPercentage_019e0416-5047-70a2-a3b4-8196aa43a716" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseRightOfUseAssetBeforeAccumulatedAmortization_019e0416-5047-7a10-9a1e-06d10e76b1a2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FinanceLeaseRightOfUseAssetBeforeAccumulatedAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019e0416-5047-721a-8f57-bdc012a78bcc" xlink:to="loc_us-gaap_FinanceLeaseRightOfUseAssetBeforeAccumulatedAmortization_019e0416-5047-7a10-9a1e-06d10e76b1a2" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction_019e0416-5047-7524-a1b4-0d81aab30672" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019e0416-5047-721a-8f57-bdc012a78bcc" xlink:to="loc_us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction_019e0416-5047-7524-a1b4-0d81aab30672" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SaleOfStockPricePerShare_019e0416-5047-7d13-b304-cdaa9ebf50ea" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SaleOfStockPricePerShare"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019e0416-5047-721a-8f57-bdc012a78bcc" xlink:to="loc_us-gaap_SaleOfStockPricePerShare_019e0416-5047-7d13-b304-cdaa9ebf50ea" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SaleOfStockConsiderationReceivedOnTransaction_019e0416-5047-7004-bc8a-d00551d95ad3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SaleOfStockConsiderationReceivedOnTransaction"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019e0416-5047-721a-8f57-bdc012a78bcc" xlink:to="loc_us-gaap_SaleOfStockConsiderationReceivedOnTransaction_019e0416-5047-7004-bc8a-d00551d95ad3" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_joby_GainLossOnCommonStockIssuedInPrivatePlacement_019e0416-5047-791a-9932-7c652b025ac8" xlink:href="joby-20260630.xsd#joby_GainLossOnCommonStockIssuedInPrivatePlacement"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019e0416-5047-721a-8f57-bdc012a78bcc" xlink:to="loc_joby_GainLossOnCommonStockIssuedInPrivatePlacement_019e0416-5047-791a-9932-7c652b025ac8" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_joby_JointVentureCommonStockSharesAcquired_019f5e86-294f-7499-a044-752a4631489c" xlink:href="joby-20260630.xsd#joby_JointVentureCommonStockSharesAcquired"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019e0416-5047-721a-8f57-bdc012a78bcc" xlink:to="loc_joby_JointVentureCommonStockSharesAcquired_019f5e86-294f-7499-a044-752a4631489c" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockParOrStatedValuePerShare_019f5e87-3517-7dd4-83fb-ce8a0d0bd20e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonStockParOrStatedValuePerShare"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019e0416-5047-721a-8f57-bdc012a78bcc" xlink:to="loc_us-gaap_CommonStockParOrStatedValuePerShare_019f5e87-3517-7dd4-83fb-ce8a0d0bd20e" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquireInterestInJointVenture_019f6dbe-2372-7aa6-886c-cae2c6ed6f2c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PaymentsToAcquireInterestInJointVenture"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019e0416-5047-721a-8f57-bdc012a78bcc" xlink:to="loc_us-gaap_PaymentsToAcquireInterestInJointVenture_019f6dbe-2372-7aa6-886c-cae2c6ed6f2c" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityMethodInvestmentOwnershipPercentage_019f5e51-cdbb-79de-8927-83d27ba1d942" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EquityMethodInvestmentOwnershipPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019e0416-5047-721a-8f57-bdc012a78bcc" xlink:to="loc_us-gaap_EquityMethodInvestmentOwnershipPercentage_019f5e51-cdbb-79de-8927-83d27ba1d942" xlink:type="arc" order="11"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.jobyaviation.com/role/NetLossPerShareAttributabletoCommonStockholdersScheduleofAntidilutiveSecuritiesExcludedfromComputationofEarningsPerShareDetails" xlink:type="simple" xlink:href="joby-20260630.xsd#NetLossPerShareAttributabletoCommonStockholdersScheduleofAntidilutiveSecuritiesExcludedfromComputationofEarningsPerShareDetails"/>
  <link:definitionLink xlink:role="http://www.jobyaviation.com/role/NetLossPerShareAttributabletoCommonStockholdersScheduleofAntidilutiveSecuritiesExcludedfromComputationofEarningsPerShareDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_019e0416-5047-7391-849c-e19868c7f1ba" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_019e0416-5047-7fd8-947a-21ff1c5c9aaa" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_019e0416-5047-7391-849c-e19868c7f1ba" xlink:to="loc_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_019e0416-5047-7fd8-947a-21ff1c5c9aaa" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_019e0416-5047-72cc-af9a-376e74429d39" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_019e0416-5047-7fd8-947a-21ff1c5c9aaa" xlink:to="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_019e0416-5047-72cc-af9a-376e74429d39" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesNameDomain_019e0416-5047-72cc-af9a-376e74429d39_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AntidilutiveSecuritiesNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_019e0416-5047-72cc-af9a-376e74429d39" xlink:to="loc_us-gaap_AntidilutiveSecuritiesNameDomain_019e0416-5047-72cc-af9a-376e74429d39_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesNameDomain_019e0416-5047-749a-9ce1-0ea261511af1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AntidilutiveSecuritiesNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_019e0416-5047-72cc-af9a-376e74429d39" xlink:to="loc_us-gaap_AntidilutiveSecuritiesNameDomain_019e0416-5047-749a-9ce1-0ea261511af1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WarrantMember_019e0416-5047-7e4d-80c9-dfb6015129b4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_WarrantMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesNameDomain_019e0416-5047-749a-9ce1-0ea261511af1" xlink:to="loc_us-gaap_WarrantMember_019e0416-5047-7e4d-80c9-dfb6015129b4" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_joby_UnvestedRestrictedStockAwardsMember_019f2341-744f-738f-b667-6994d5ca8607" xlink:href="joby-20260630.xsd#joby_UnvestedRestrictedStockAwardsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesNameDomain_019e0416-5047-749a-9ce1-0ea261511af1" xlink:to="loc_joby_UnvestedRestrictedStockAwardsMember_019f2341-744f-738f-b667-6994d5ca8607" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_joby_UnvestedRestrictedStockUnitsMember_019eeec6-d7d1-7de7-9ddd-f372dc12578c" xlink:href="joby-20260630.xsd#joby_UnvestedRestrictedStockUnitsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesNameDomain_019e0416-5047-749a-9ce1-0ea261511af1" xlink:to="loc_joby_UnvestedRestrictedStockUnitsMember_019eeec6-d7d1-7de7-9ddd-f372dc12578c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeStockOptionMember_019e0416-5047-7495-aa71-e9902a5c33cc" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EmployeeStockOptionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesNameDomain_019e0416-5047-749a-9ce1-0ea261511af1" xlink:to="loc_us-gaap_EmployeeStockOptionMember_019e0416-5047-7495-aa71-e9902a5c33cc" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_joby_UnvestedExercisedCommonStockOptionsMember_019e0416-5047-777a-9c2a-59f775e87793" xlink:href="joby-20260630.xsd#joby_UnvestedExercisedCommonStockOptionsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesNameDomain_019e0416-5047-749a-9ce1-0ea261511af1" xlink:to="loc_joby_UnvestedExercisedCommonStockOptionsMember_019e0416-5047-777a-9c2a-59f775e87793" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConvertibleDebtSecuritiesMember_019eeec8-317a-7ad8-ab11-2d30be711632" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ConvertibleDebtSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesNameDomain_019e0416-5047-749a-9ce1-0ea261511af1" xlink:to="loc_us-gaap_ConvertibleDebtSecuritiesMember_019eeec8-317a-7ad8-ab11-2d30be711632" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_019eeec9-0690-77e4-8010-a9465b3d7906" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_019e0416-5047-7fd8-947a-21ff1c5c9aaa" xlink:to="loc_us-gaap_DebtInstrumentAxis_019eeec9-0690-77e4-8010-a9465b3d7906" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019eeec9-0690-77e4-8010-a9465b3d7906_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_019eeec9-0690-77e4-8010-a9465b3d7906" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019eeec9-0690-77e4-8010-a9465b3d7906_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019eeec9-0690-7aab-8eec-03c3417d37c7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_019eeec9-0690-77e4-8010-a9465b3d7906" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019eeec9-0690-7aab-8eec-03c3417d37c7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_joby_ConvertibleSeniorNotesDue2032Member_019eeec9-34e8-7bf5-bdda-4459165ddb18" xlink:href="joby-20260630.xsd#joby_ConvertibleSeniorNotesDue2032Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019eeec9-0690-7aab-8eec-03c3417d37c7" xlink:to="loc_joby_ConvertibleSeniorNotesDue2032Member_019eeec9-34e8-7bf5-bdda-4459165ddb18" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_019eeec9-5e99-7f41-ad64-7cd1770d55d6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_019e0416-5047-7fd8-947a-21ff1c5c9aaa" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_019eeec9-5e99-7f41-ad64-7cd1770d55d6" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019eeec9-5e99-7f41-ad64-7cd1770d55d6_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_019eeec9-5e99-7f41-ad64-7cd1770d55d6" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019eeec9-5e99-7f41-ad64-7cd1770d55d6_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019eeec9-5e99-77b0-af74-bb089ad2b41e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_019eeec9-5e99-7f41-ad64-7cd1770d55d6" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019eeec9-5e99-77b0-af74-bb089ad2b41e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConvertibleDebtMember_019eeec9-87da-7093-93b0-07db3f45832e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ConvertibleDebtMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_019eeec9-5e99-77b0-af74-bb089ad2b41e" xlink:to="loc_us-gaap_ConvertibleDebtMember_019eeec9-87da-7093-93b0-07db3f45832e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_019e0416-5047-7b01-b9fa-7e53f6594a41" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_019e0416-5047-7391-849c-e19868c7f1ba" xlink:to="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_019e0416-5047-7b01-b9fa-7e53f6594a41" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentFaceAmount_019eeec8-cd0e-7ffd-89d9-231b3af6d6c3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentFaceAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_019e0416-5047-7391-849c-e19868c7f1ba" xlink:to="loc_us-gaap_DebtInstrumentFaceAmount_019eeec8-cd0e-7ffd-89d9-231b3af6d6c3" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.jobyaviation.com/role/SegmentReportingScheduleofSegmentReportingDetails" xlink:type="simple" xlink:href="joby-20260630.xsd#SegmentReportingScheduleofSegmentReportingDetails"/>
  <link:definitionLink xlink:role="http://www.jobyaviation.com/role/SegmentReportingScheduleofSegmentReportingDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentReportingInformationLineItems_019e0416-5047-7e47-a894-4492a1f8e718" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SegmentReportingInformationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_019e0416-5047-7a97-97b3-d28af123526b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019e0416-5047-7e47-a894-4492a1f8e718" xlink:to="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_019e0416-5047-7a97-97b3-d28af123526b" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_019e0416-5047-7858-be88-2121730e2939" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_019e0416-5047-7a97-97b3-d28af123526b" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_019e0416-5047-7858-be88-2121730e2939" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_019e0416-5047-7858-be88-2121730e2939_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_019e0416-5047-7858-be88-2121730e2939" xlink:to="loc_us-gaap_SegmentDomain_019e0416-5047-7858-be88-2121730e2939_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_019e0416-5047-7064-8451-d120495fa6fc" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_019e0416-5047-7858-be88-2121730e2939" xlink:to="loc_us-gaap_SegmentDomain_019e0416-5047-7064-8451-d120495fa6fc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_joby_FlightServicesMember_019e0416-5047-7f5f-a3c3-a3ffa79f936d" xlink:href="joby-20260630.xsd#joby_FlightServicesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019e0416-5047-7064-8451-d120495fa6fc" xlink:to="loc_joby_FlightServicesMember_019e0416-5047-7f5f-a3c3-a3ffa79f936d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_019e0416-5047-759a-b143-5e0956cee06b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019e0416-5047-7e47-a894-4492a1f8e718" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_019e0416-5047-759a-b143-5e0956cee06b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_joby_PersonnelRelatedCostsExcludingStockBasedCompensationExpense_019e0416-5047-70ed-9189-7181a60520db" xlink:href="joby-20260630.xsd#joby_PersonnelRelatedCostsExcludingStockBasedCompensationExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019e0416-5047-7e47-a894-4492a1f8e718" xlink:to="loc_joby_PersonnelRelatedCostsExcludingStockBasedCompensationExpense_019e0416-5047-70ed-9189-7181a60520db" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_joby_GainLossFromChangeInTheFairValueOfWarrantsEarnoutSharesAndContingentConsideration_019f2345-661f-78f8-a38c-f0635b9fdae3" xlink:href="joby-20260630.xsd#joby_GainLossFromChangeInTheFairValueOfWarrantsEarnoutSharesAndContingentConsideration"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019e0416-5047-7e47-a894-4492a1f8e718" xlink:to="loc_joby_GainLossFromChangeInTheFairValueOfWarrantsEarnoutSharesAndContingentConsideration_019f2345-661f-78f8-a38c-f0635b9fdae3" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllocatedShareBasedCompensationExpense_019e0416-5047-7a7b-9a39-961be5930817" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AllocatedShareBasedCompensationExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019e0416-5047-7e47-a894-4492a1f8e718" xlink:to="loc_us-gaap_AllocatedShareBasedCompensationExpense_019e0416-5047-7a7b-9a39-961be5930817" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentReportingOtherItemAmount_019e0416-5047-7114-8f3f-439cc1f56cc9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SegmentReportingOtherItemAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019e0416-5047-7e47-a894-4492a1f8e718" xlink:to="loc_us-gaap_SegmentReportingOtherItemAmount_019e0416-5047-7114-8f3f-439cc1f56cc9" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_019e0416-5047-7f5f-a2d8-9c94830bea26" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019e0416-5047-7e47-a894-4492a1f8e718" xlink:to="loc_us-gaap_NetIncomeLoss_019e0416-5047-7f5f-a2d8-9c94830bea26" xlink:type="arc" order="5"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.jobyaviation.com/role/SegmentReportingGeographicInformationDetails" xlink:type="simple" xlink:href="joby-20260630.xsd#SegmentReportingGeographicInformationDetails"/>
  <link:definitionLink xlink:role="http://www.jobyaviation.com/role/SegmentReportingGeographicInformationDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems_019eeed2-e02d-7a14-a840-a7ed8c3e623f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable_019eeed2-e02d-7927-89f8-17c517293d36" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems_019eeed2-e02d-7a14-a840-a7ed8c3e623f" xlink:to="loc_us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable_019eeed2-e02d-7927-89f8-17c517293d36" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_StatementGeographicalAxis_019eeed3-20f4-75fe-b695-1d99e7def6d2" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_StatementGeographicalAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable_019eeed2-e02d-7927-89f8-17c517293d36" xlink:to="loc_srt_StatementGeographicalAxis_019eeed3-20f4-75fe-b695-1d99e7def6d2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_019eeed3-20f4-75fe-b695-1d99e7def6d2_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_SegmentGeographicalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_StatementGeographicalAxis_019eeed3-20f4-75fe-b695-1d99e7def6d2" xlink:to="loc_srt_SegmentGeographicalDomain_019eeed3-20f4-75fe-b695-1d99e7def6d2_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_019eeed3-20f4-7843-a545-e2d2860255f3" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_SegmentGeographicalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_StatementGeographicalAxis_019eeed3-20f4-75fe-b695-1d99e7def6d2" xlink:to="loc_srt_SegmentGeographicalDomain_019eeed3-20f4-7843-a545-e2d2860255f3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_US_019eeed3-6285-7c9b-b6be-4a2bec9f0513" xlink:href="https://xbrl.sec.gov/country/2026/country-2026.xsd#country_US"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_019eeed3-20f4-7843-a545-e2d2860255f3" xlink:to="loc_country_US_019eeed3-6285-7c9b-b6be-4a2bec9f0513" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_EuropeMember_019eeed5-95b0-7cc7-8fe0-17042153848f" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_EuropeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_019eeed3-20f4-7843-a545-e2d2860255f3" xlink:to="loc_srt_EuropeMember_019eeed5-95b0-7cc7-8fe0-17042153848f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NonUsMember_019eeed5-d74f-7e90-a38d-6642b9f56507" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NonUsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_019eeed3-20f4-7843-a545-e2d2860255f3" xlink:to="loc_us-gaap_NonUsMember_019eeed5-d74f-7e90-a38d-6642b9f56507" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_019eeed2-e02d-74f8-9982-b3bbb23e2c51" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems_019eeed2-e02d-7a14-a840-a7ed8c3e623f" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_019eeed2-e02d-74f8-9982-b3bbb23e2c51" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NoncurrentAssets_019eeed7-0358-781d-b9f1-4f10e9c83594" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NoncurrentAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems_019eeed2-e02d-7a14-a840-a7ed8c3e623f" xlink:to="loc_us-gaap_NoncurrentAssets_019eeed7-0358-781d-b9f1-4f10e9c83594" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://xbrl.sec.gov/ecd/role/IndividualsOnly" xlink:type="simple" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#IndividualsOnly"/>
  <link:definitionLink xlink:role="http://xbrl.sec.gov/ecd/role/IndividualsOnly" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ecd_AllIndividualsMember" xlink:href="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd#ecd_AllIndividualsMember"/>
    <link:loc xlink:type="locator" xlink:label="loc_joby_PaulSciarraMember_019e0416-4ef6-798e-9171-588e90e07902" xlink:href="joby-20260630.xsd#joby_PaulSciarraMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ecd_AllIndividualsMember" xlink:to="loc_joby_PaulSciarraMember_019e0416-4ef6-798e-9171-588e90e07902" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_joby_BonnySimiMember_019f5e9e-5f96-7cdb-a68c-c1b2c8c0d578" xlink:href="joby-20260630.xsd#joby_BonnySimiMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ecd_AllIndividualsMember" xlink:to="loc_joby_BonnySimiMember_019f5e9e-5f96-7cdb-a68c-c1b2c8c0d578" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_joby_BonnySimiTradingArrangementCommonStockMember_019fb8bf-171a-73e4-9f26-22ac33228657" xlink:href="joby-20260630.xsd#joby_BonnySimiTradingArrangementCommonStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ecd_AllIndividualsMember" xlink:to="loc_joby_BonnySimiTradingArrangementCommonStockMember_019fb8bf-171a-73e4-9f26-22ac33228657" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_joby_BonnySimiTradingArrangementStockOptionsMember_019f5e9f-9c52-7915-a126-0268553a9dc4" xlink:href="joby-20260630.xsd#joby_BonnySimiTradingArrangementStockOptionsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ecd_AllIndividualsMember" xlink:to="loc_joby_BonnySimiTradingArrangementStockOptionsMember_019f5e9f-9c52-7915-a126-0268553a9dc4" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_joby_GregBowlesMember_019f5ea4-422f-73fd-b2be-abea26c6b36e" xlink:href="joby-20260630.xsd#joby_GregBowlesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ecd_AllIndividualsMember" xlink:to="loc_joby_GregBowlesMember_019f5ea4-422f-73fd-b2be-abea26c6b36e" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_joby_GregBowlesTradingArrangementCommonStockMember_019fb8c0-9dc8-720e-887f-143c644cb7ee" xlink:href="joby-20260630.xsd#joby_GregBowlesTradingArrangementCommonStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ecd_AllIndividualsMember" xlink:to="loc_joby_GregBowlesTradingArrangementCommonStockMember_019fb8c0-9dc8-720e-887f-143c644cb7ee" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_joby_GregBowlesTradingArrangementStockOptionsMember_019f5ea4-8f71-7a72-8f07-702382e79835" xlink:href="joby-20260630.xsd#joby_GregBowlesTradingArrangementStockOptionsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ecd_AllIndividualsMember" xlink:to="loc_joby_GregBowlesTradingArrangementStockOptionsMember_019f5ea4-8f71-7a72-8f07-702382e79835" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_joby_GregBowlesTradingArrangementSharesIssuedUponVestingOfRestrictedStockUnitsMember_019fb8c1-fc3f-7edc-91cd-d57bc289890d" xlink:href="joby-20260630.xsd#joby_GregBowlesTradingArrangementSharesIssuedUponVestingOfRestrictedStockUnitsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ecd_AllIndividualsMember" xlink:to="loc_joby_GregBowlesTradingArrangementSharesIssuedUponVestingOfRestrictedStockUnitsMember_019fb8c1-fc3f-7edc-91cd-d57bc289890d" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_joby_DidierPapadopoulosMember_019f5ea8-97ea-752d-b796-733c0be6242b" xlink:href="joby-20260630.xsd#joby_DidierPapadopoulosMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ecd_AllIndividualsMember" xlink:to="loc_joby_DidierPapadopoulosMember_019f5ea8-97ea-752d-b796-733c0be6242b" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_joby_DidierPapadopoulosTradingArrangementCommonStockMember_019fb8c2-9615-788a-a2f5-5c23bb6f645a" xlink:href="joby-20260630.xsd#joby_DidierPapadopoulosTradingArrangementCommonStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ecd_AllIndividualsMember" xlink:to="loc_joby_DidierPapadopoulosTradingArrangementCommonStockMember_019fb8c2-9615-788a-a2f5-5c23bb6f645a" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_joby_DidierPapadopoulosTradingArrangementSharesIssuedUponVestingOfRestrictedStockUnitsMember_019fb8c2-fc9b-7666-89dc-2be2b747d362" xlink:href="joby-20260630.xsd#joby_DidierPapadopoulosTradingArrangementSharesIssuedUponVestingOfRestrictedStockUnitsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ecd_AllIndividualsMember" xlink:to="loc_joby_DidierPapadopoulosTradingArrangementSharesIssuedUponVestingOfRestrictedStockUnitsMember_019fb8c2-fc9b-7666-89dc-2be2b747d362" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_joby_KateDeHoffMember_019e0416-4ef6-7475-b00b-28a0dfa45378" xlink:href="joby-20260630.xsd#joby_KateDeHoffMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ecd_AllIndividualsMember" xlink:to="loc_joby_KateDeHoffMember_019e0416-4ef6-7475-b00b-28a0dfa45378" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_joby_KateDeHoffTradingArrangementCommonStockMember_019fb8c3-714d-75c6-87ac-f7d38f9eeb8f" xlink:href="joby-20260630.xsd#joby_KateDeHoffTradingArrangementCommonStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ecd_AllIndividualsMember" xlink:to="loc_joby_KateDeHoffTradingArrangementCommonStockMember_019fb8c3-714d-75c6-87ac-f7d38f9eeb8f" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_joby_KateDeHoffTradingArrangementSharesIssuedUponVestingOfRestrictedStockUnitsMember_019fb8c4-ad6a-7b6d-92eb-8d3c5b2dc0a1" xlink:href="joby-20260630.xsd#joby_KateDeHoffTradingArrangementSharesIssuedUponVestingOfRestrictedStockUnitsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ecd_AllIndividualsMember" xlink:to="loc_joby_KateDeHoffTradingArrangementSharesIssuedUponVestingOfRestrictedStockUnitsMember_019fb8c4-ad6a-7b6d-92eb-8d3c5b2dc0a1" xlink:type="arc" order="15"/>
  </link:definitionLink>
</link:linkbase>
