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

<!--XBRL Document Created with the Workiva Platform-->
<!--Copyright 2026 Workiva-->
<!--r:019fcd6b-87be-75b6-8b88-45fe98dab0a9,g:2ed0a09a-755f-4321-b3be-2c2bb3b3b89c-->
<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://voyager.com/role/Cover" xlink:type="simple" xlink:href="voyg-20260930.xsd#Cover"/>
  <link:definitionLink xlink:role="http://voyager.com/role/Cover" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentInformationLineItems_019fcd6b-8933-709b-96fd-c2ba5f5ea7f6" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_DocumentInformationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentInformationTable_019fcd6b-8933-70eb-965b-df471d74a04c" 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_019fcd6b-8933-709b-96fd-c2ba5f5ea7f6" xlink:to="loc_dei_DocumentInformationTable_019fcd6b-8933-70eb-965b-df471d74a04c" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementClassOfStockAxis_019fcd6b-8933-7a92-91f1-3fa5532d0c14" 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_019fcd6b-8933-70eb-965b-df471d74a04c" xlink:to="loc_us-gaap_StatementClassOfStockAxis_019fcd6b-8933-7a92-91f1-3fa5532d0c14" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_019fcd6b-8933-7a92-91f1-3fa5532d0c14_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_019fcd6b-8933-7a92-91f1-3fa5532d0c14" xlink:to="loc_us-gaap_ClassOfStockDomain_019fcd6b-8933-7a92-91f1-3fa5532d0c14_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_019fcd6b-8933-7ec0-adee-8a1432377564" 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_019fcd6b-8933-7a92-91f1-3fa5532d0c14" xlink:to="loc_us-gaap_ClassOfStockDomain_019fcd6b-8933-7ec0-adee-8a1432377564" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonClassAMember_019fcd6b-8933-78f6-ad97-95ea059041ee" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonClassAMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_019fcd6b-8933-7ec0-adee-8a1432377564" xlink:to="loc_us-gaap_CommonClassAMember_019fcd6b-8933-78f6-ad97-95ea059041ee" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonClassBMember_019fcd6b-8933-7e63-ba9e-f848575b258c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonClassBMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_019fcd6b-8933-7ec0-adee-8a1432377564" xlink:to="loc_us-gaap_CommonClassBMember_019fcd6b-8933-7e63-ba9e-f848575b258c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentType_019fcd6b-8933-75dd-83f8-27e3f4a4ff71" 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_019fcd6b-8933-709b-96fd-c2ba5f5ea7f6" xlink:to="loc_dei_DocumentType_019fcd6b-8933-75dd-83f8-27e3f4a4ff71" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentQuarterlyReport_019fcd6b-8933-7262-b594-d476d2b4dc17" 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_019fcd6b-8933-709b-96fd-c2ba5f5ea7f6" xlink:to="loc_dei_DocumentQuarterlyReport_019fcd6b-8933-7262-b594-d476d2b4dc17" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentPeriodEndDate_019fcd6b-8933-73aa-9fcf-89f8007c7317" 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_019fcd6b-8933-709b-96fd-c2ba5f5ea7f6" xlink:to="loc_dei_DocumentPeriodEndDate_019fcd6b-8933-73aa-9fcf-89f8007c7317" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentTransitionReport_019fcd6b-8933-798a-b2b8-1d5678669361" 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_019fcd6b-8933-709b-96fd-c2ba5f5ea7f6" xlink:to="loc_dei_DocumentTransitionReport_019fcd6b-8933-798a-b2b8-1d5678669361" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityFileNumber_019fcd6b-8933-77d2-bc09-a1b508cac5db" 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_019fcd6b-8933-709b-96fd-c2ba5f5ea7f6" xlink:to="loc_dei_EntityFileNumber_019fcd6b-8933-77d2-bc09-a1b508cac5db" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityRegistrantName_019fcd6b-8933-7e53-b61b-0d2594ef6095" 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_019fcd6b-8933-709b-96fd-c2ba5f5ea7f6" xlink:to="loc_dei_EntityRegistrantName_019fcd6b-8933-7e53-b61b-0d2594ef6095" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityIncorporationStateCountryCode_019fcd6b-8933-7286-8573-6d4a67e53928" 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_019fcd6b-8933-709b-96fd-c2ba5f5ea7f6" xlink:to="loc_dei_EntityIncorporationStateCountryCode_019fcd6b-8933-7286-8573-6d4a67e53928" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityTaxIdentificationNumber_019fcd6b-8933-717b-bf10-14b597392de4" 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_019fcd6b-8933-709b-96fd-c2ba5f5ea7f6" xlink:to="loc_dei_EntityTaxIdentificationNumber_019fcd6b-8933-717b-bf10-14b597392de4" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressAddressLine1_019fcd6b-8933-7b2c-ad4a-9bf9312376ba" 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_019fcd6b-8933-709b-96fd-c2ba5f5ea7f6" xlink:to="loc_dei_EntityAddressAddressLine1_019fcd6b-8933-7b2c-ad4a-9bf9312376ba" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressAddressLine2_019fcd6b-8933-7ae3-8554-2947bd8da316" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityAddressAddressLine2"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019fcd6b-8933-709b-96fd-c2ba5f5ea7f6" xlink:to="loc_dei_EntityAddressAddressLine2_019fcd6b-8933-7ae3-8554-2947bd8da316" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressCityOrTown_019fcd6b-8933-7da0-b2f3-c0228f9bb5b5" 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_019fcd6b-8933-709b-96fd-c2ba5f5ea7f6" xlink:to="loc_dei_EntityAddressCityOrTown_019fcd6b-8933-7da0-b2f3-c0228f9bb5b5" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressStateOrProvince_019fcd6b-8933-7df4-a4b2-4b55145968c5" 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_019fcd6b-8933-709b-96fd-c2ba5f5ea7f6" xlink:to="loc_dei_EntityAddressStateOrProvince_019fcd6b-8933-7df4-a4b2-4b55145968c5" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressPostalZipCode_019fcd6b-8933-78bc-b5e9-9f0afc3bd8d0" 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_019fcd6b-8933-709b-96fd-c2ba5f5ea7f6" xlink:to="loc_dei_EntityAddressPostalZipCode_019fcd6b-8933-78bc-b5e9-9f0afc3bd8d0" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_CityAreaCode_019fcd6b-8933-708d-bb07-fe46c544e76f" 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_019fcd6b-8933-709b-96fd-c2ba5f5ea7f6" xlink:to="loc_dei_CityAreaCode_019fcd6b-8933-708d-bb07-fe46c544e76f" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LocalPhoneNumber_019fcd6b-8933-7c07-b179-6ec83324a63d" 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_019fcd6b-8933-709b-96fd-c2ba5f5ea7f6" xlink:to="loc_dei_LocalPhoneNumber_019fcd6b-8933-7c07-b179-6ec83324a63d" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_Security12bTitle_019fcd6b-8933-727f-937c-64fe290ea288" 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_019fcd6b-8933-709b-96fd-c2ba5f5ea7f6" xlink:to="loc_dei_Security12bTitle_019fcd6b-8933-727f-937c-64fe290ea288" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_TradingSymbol_019fcd6b-8933-7b3f-a552-93ec97de6d14" 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_019fcd6b-8933-709b-96fd-c2ba5f5ea7f6" xlink:to="loc_dei_TradingSymbol_019fcd6b-8933-7b3f-a552-93ec97de6d14" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_SecurityExchangeName_019fcd6b-8933-7469-acb4-375d39460946" 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_019fcd6b-8933-709b-96fd-c2ba5f5ea7f6" xlink:to="loc_dei_SecurityExchangeName_019fcd6b-8933-7469-acb4-375d39460946" xlink:type="arc" order="17"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityCurrentReportingStatus_019fcd6b-8933-7919-801a-9361d8de20ce" 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_019fcd6b-8933-709b-96fd-c2ba5f5ea7f6" xlink:to="loc_dei_EntityCurrentReportingStatus_019fcd6b-8933-7919-801a-9361d8de20ce" xlink:type="arc" order="18"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityInteractiveDataCurrent_019fcd6b-8933-7711-8986-820d51e06246" 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_019fcd6b-8933-709b-96fd-c2ba5f5ea7f6" xlink:to="loc_dei_EntityInteractiveDataCurrent_019fcd6b-8933-7711-8986-820d51e06246" xlink:type="arc" order="19"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityFilerCategory_019fcd6b-8933-77a1-af94-8b5d35497c2c" 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_019fcd6b-8933-709b-96fd-c2ba5f5ea7f6" xlink:to="loc_dei_EntityFilerCategory_019fcd6b-8933-77a1-af94-8b5d35497c2c" xlink:type="arc" order="20"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntitySmallBusiness_019fcd6b-8933-773f-921c-69ef47d3e8ec" 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_019fcd6b-8933-709b-96fd-c2ba5f5ea7f6" xlink:to="loc_dei_EntitySmallBusiness_019fcd6b-8933-773f-921c-69ef47d3e8ec" xlink:type="arc" order="21"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityEmergingGrowthCompany_019fcd6b-8933-71fa-bbdd-723aa9ecc924" 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_019fcd6b-8933-709b-96fd-c2ba5f5ea7f6" xlink:to="loc_dei_EntityEmergingGrowthCompany_019fcd6b-8933-71fa-bbdd-723aa9ecc924" xlink:type="arc" order="22"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityExTransitionPeriod_019fcd6b-8933-7245-b9bd-3b054ef3f4ee" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityExTransitionPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019fcd6b-8933-709b-96fd-c2ba5f5ea7f6" xlink:to="loc_dei_EntityExTransitionPeriod_019fcd6b-8933-7245-b9bd-3b054ef3f4ee" xlink:type="arc" order="23"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityShellCompany_019fcd6b-8933-7d18-9291-eadcbe790e41" 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_019fcd6b-8933-709b-96fd-c2ba5f5ea7f6" xlink:to="loc_dei_EntityShellCompany_019fcd6b-8933-7d18-9291-eadcbe790e41" xlink:type="arc" order="24"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityCommonStockSharesOutstanding_019fcd6b-8933-76dc-aeb6-e5184aa03587" 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_019fcd6b-8933-709b-96fd-c2ba5f5ea7f6" xlink:to="loc_dei_EntityCommonStockSharesOutstanding_019fcd6b-8933-76dc-aeb6-e5184aa03587" xlink:type="arc" order="25"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityCentralIndexKey_019fcd6b-8933-7cea-aad4-be544947c12a" 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_019fcd6b-8933-709b-96fd-c2ba5f5ea7f6" xlink:to="loc_dei_EntityCentralIndexKey_019fcd6b-8933-7cea-aad4-be544947c12a" xlink:type="arc" order="26"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_AmendmentFlag_019fcd6b-8933-750b-b71e-63e1add8f95d" 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_019fcd6b-8933-709b-96fd-c2ba5f5ea7f6" xlink:to="loc_dei_AmendmentFlag_019fcd6b-8933-750b-b71e-63e1add8f95d" xlink:type="arc" order="27"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentFiscalPeriodFocus_019fcd6b-8933-704f-a59c-4b4e4cd9afa1" 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_019fcd6b-8933-709b-96fd-c2ba5f5ea7f6" xlink:to="loc_dei_DocumentFiscalPeriodFocus_019fcd6b-8933-704f-a59c-4b4e4cd9afa1" xlink:type="arc" order="28"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentFiscalYearFocus_019fcd6b-8933-7e25-914d-e4d309f7df23" 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_019fcd6b-8933-709b-96fd-c2ba5f5ea7f6" xlink:to="loc_dei_DocumentFiscalYearFocus_019fcd6b-8933-7e25-914d-e4d309f7df23" xlink:type="arc" order="29"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_CurrentFiscalYearEndDate_019fcd6b-8933-7b97-a907-3217ad803d1a" 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_019fcd6b-8933-709b-96fd-c2ba5f5ea7f6" xlink:to="loc_dei_CurrentFiscalYearEndDate_019fcd6b-8933-7b97-a907-3217ad803d1a" xlink:type="arc" order="30"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://voyager.com/role/CONDENSEDCONSOLIDATEDBALANCESHEETS" xlink:type="simple" xlink:href="voyg-20260930.xsd#CONDENSEDCONSOLIDATEDBALANCESHEETS"/>
  <link:definitionLink xlink:role="http://voyager.com/role/CONDENSEDCONSOLIDATEDBALANCESHEETS" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_019fcd6b-8933-7039-821a-94ffeaa43f09" 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_019fcd6b-8933-76a2-bedd-a596d92bd35a" 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_019fcd6b-8933-7039-821a-94ffeaa43f09" xlink:to="loc_us-gaap_StatementTable_019fcd6b-8933-76a2-bedd-a596d92bd35a" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementClassOfStockAxis_019fcd6b-8933-7090-810b-7dd91e0cd528" 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_StatementTable_019fcd6b-8933-76a2-bedd-a596d92bd35a" xlink:to="loc_us-gaap_StatementClassOfStockAxis_019fcd6b-8933-7090-810b-7dd91e0cd528" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_019fcd6b-8933-7090-810b-7dd91e0cd528_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_019fcd6b-8933-7090-810b-7dd91e0cd528" xlink:to="loc_us-gaap_ClassOfStockDomain_019fcd6b-8933-7090-810b-7dd91e0cd528_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_019fcd6b-8933-79b0-8b8e-ef78fee31f7f" 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_019fcd6b-8933-7090-810b-7dd91e0cd528" xlink:to="loc_us-gaap_ClassOfStockDomain_019fcd6b-8933-79b0-8b8e-ef78fee31f7f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonClassAMember_019fcd6b-8933-7173-8599-fbc10bf1971a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonClassAMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_019fcd6b-8933-79b0-8b8e-ef78fee31f7f" xlink:to="loc_us-gaap_CommonClassAMember_019fcd6b-8933-7173-8599-fbc10bf1971a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonClassBMember_019fcd6b-8933-7dec-af50-ffc72b88f75d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonClassBMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_019fcd6b-8933-79b0-8b8e-ef78fee31f7f" xlink:to="loc_us-gaap_CommonClassBMember_019fcd6b-8933-7dec-af50-ffc72b88f75d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsAbstract_019fcd6b-8933-76c8-878b-b504c5254395" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AssetsAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019fcd6b-8933-7039-821a-94ffeaa43f09" xlink:to="loc_us-gaap_AssetsAbstract_019fcd6b-8933-76c8-878b-b504c5254395" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsCurrentAbstract_019fcd6b-8933-745d-a104-65e87feb1d5e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AssetsCurrentAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_019fcd6b-8933-76c8-878b-b504c5254395" xlink:to="loc_us-gaap_AssetsCurrentAbstract_019fcd6b-8933-745d-a104-65e87feb1d5e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_019fcd6b-8933-750b-9537-904d3d746830" 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_AssetsCurrentAbstract_019fcd6b-8933-745d-a104-65e87feb1d5e" xlink:to="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_019fcd6b-8933-750b-9537-904d3d746830" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsReceivableNetCurrent_019fcd6b-8934-70b2-94a3-46cf79677b00" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AccountsReceivableNetCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsCurrentAbstract_019fcd6b-8933-745d-a104-65e87feb1d5e" xlink:to="loc_us-gaap_AccountsReceivableNetCurrent_019fcd6b-8934-70b2-94a3-46cf79677b00" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerAssetNetCurrent_019fcd6b-8934-7435-8ffa-40bc0418e1d3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ContractWithCustomerAssetNetCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsCurrentAbstract_019fcd6b-8933-745d-a104-65e87feb1d5e" xlink:to="loc_us-gaap_ContractWithCustomerAssetNetCurrent_019fcd6b-8934-7435-8ffa-40bc0418e1d3" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InventoryNet_019fcd6b-8934-78ec-ae63-697af7f9f6ba" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InventoryNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsCurrentAbstract_019fcd6b-8933-745d-a104-65e87feb1d5e" xlink:to="loc_us-gaap_InventoryNet_019fcd6b-8934-78ec-ae63-697af7f9f6ba" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PrepaidExpenseCurrent_01a10a6e-e46f-7f30-bdea-4c5ff06ab569" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PrepaidExpenseCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsCurrentAbstract_019fcd6b-8933-745d-a104-65e87feb1d5e" xlink:to="loc_us-gaap_PrepaidExpenseCurrent_01a10a6e-e46f-7f30-bdea-4c5ff06ab569" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PrepaidExpenseAndOtherAssetsCurrent_019fcd6b-8934-7ad1-b04f-2017ff0f47d8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PrepaidExpenseAndOtherAssetsCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsCurrentAbstract_019fcd6b-8933-745d-a104-65e87feb1d5e" xlink:to="loc_us-gaap_PrepaidExpenseAndOtherAssetsCurrent_019fcd6b-8934-7ad1-b04f-2017ff0f47d8" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsCurrent_019fcd6b-8934-7275-ac8d-5a717a5bd758" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AssetsCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsCurrentAbstract_019fcd6b-8933-745d-a104-65e87feb1d5e" xlink:to="loc_us-gaap_AssetsCurrent_019fcd6b-8934-7275-ac8d-5a717a5bd758" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentNet_019fcd6b-8934-7423-a699-e00fba7679fa" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PropertyPlantAndEquipmentNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_019fcd6b-8933-76c8-878b-b504c5254395" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentNet_019fcd6b-8934-7423-a699-e00fba7679fa" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseRightOfUseAsset_019fcd6b-8934-7d5c-a0ef-7be1f05e4d96" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingLeaseRightOfUseAsset"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_019fcd6b-8933-76c8-878b-b504c5254395" xlink:to="loc_us-gaap_OperatingLeaseRightOfUseAsset_019fcd6b-8934-7d5c-a0ef-7be1f05e4d96" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_019fcd6b-8934-755a-a307-1cf91c493ea4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IntangibleAssetsNetExcludingGoodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_019fcd6b-8933-76c8-878b-b504c5254395" xlink:to="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_019fcd6b-8934-755a-a307-1cf91c493ea4" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Goodwill_019fcd6b-8934-75f8-bd24-6d19540cd5d9" 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_AssetsAbstract_019fcd6b-8933-76c8-878b-b504c5254395" xlink:to="loc_us-gaap_Goodwill_019fcd6b-8934-75f8-bd24-6d19540cd5d9" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAssetsNoncurrent_019fcd6b-8934-7ffe-9cea-dc12039a28fd" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherAssetsNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_019fcd6b-8933-76c8-878b-b504c5254395" xlink:to="loc_us-gaap_OtherAssetsNoncurrent_019fcd6b-8934-7ffe-9cea-dc12039a28fd" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Assets_019fcd6b-8934-7aeb-bb93-71b5811658a4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_Assets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_019fcd6b-8933-76c8-878b-b504c5254395" xlink:to="loc_us-gaap_Assets_019fcd6b-8934-7aeb-bb93-71b5811658a4" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_019fcd6b-8934-7b1c-8be5-fd1709128d47" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LiabilitiesAndStockholdersEquityAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019fcd6b-8933-7039-821a-94ffeaa43f09" xlink:to="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_019fcd6b-8934-7b1c-8be5-fd1709128d47" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesCurrentAbstract_019fcd6b-8934-7ded-8e21-b5b754d4e0d2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LiabilitiesCurrentAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_019fcd6b-8934-7b1c-8be5-fd1709128d47" xlink:to="loc_us-gaap_LiabilitiesCurrentAbstract_019fcd6b-8934-7ded-8e21-b5b754d4e0d2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsPayableCurrent_019fcd6b-8934-79dd-8ecf-27b269608f11" 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_LiabilitiesCurrentAbstract_019fcd6b-8934-7ded-8e21-b5b754d4e0d2" xlink:to="loc_us-gaap_AccountsPayableCurrent_019fcd6b-8934-79dd-8ecf-27b269608f11" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerLiabilityCurrent_019fcd6b-8934-778a-b7fc-9e57f1f91c2c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ContractWithCustomerLiabilityCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_019fcd6b-8934-7ded-8e21-b5b754d4e0d2" xlink:to="loc_us-gaap_ContractWithCustomerLiabilityCurrent_019fcd6b-8934-778a-b7fc-9e57f1f91c2c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiabilityCurrent_019fcd6b-8934-7f26-a7ba-1c19a792096c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingLeaseLiabilityCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_019fcd6b-8934-7ded-8e21-b5b754d4e0d2" xlink:to="loc_us-gaap_OperatingLeaseLiabilityCurrent_019fcd6b-8934-7f26-a7ba-1c19a792096c" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccruedLiabilitiesCurrent_019fcd6b-8934-7d6e-9b6b-b821aa684a21" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AccruedLiabilitiesCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_019fcd6b-8934-7ded-8e21-b5b754d4e0d2" xlink:to="loc_us-gaap_AccruedLiabilitiesCurrent_019fcd6b-8934-7d6e-9b6b-b821aa684a21" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesCurrent_019fcd6b-8934-784f-b6f9-5dc51cfbd72a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LiabilitiesCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_019fcd6b-8934-7ded-8e21-b5b754d4e0d2" xlink:to="loc_us-gaap_LiabilitiesCurrent_019fcd6b-8934-784f-b6f9-5dc51cfbd72a" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiabilityNoncurrent_019fcd6b-8934-7965-a57d-002b5117be8c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingLeaseLiabilityNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_019fcd6b-8934-7b1c-8be5-fd1709128d47" xlink:to="loc_us-gaap_OperatingLeaseLiabilityNoncurrent_019fcd6b-8934-7965-a57d-002b5117be8c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerLiabilityNoncurrent_019fcd6b-8934-7ac8-aa17-12329d767ddd" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ContractWithCustomerLiabilityNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_019fcd6b-8934-7b1c-8be5-fd1709128d47" xlink:to="loc_us-gaap_ContractWithCustomerLiabilityNoncurrent_019fcd6b-8934-7ac8-aa17-12329d767ddd" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConvertibleDebtNoncurrent_019fcd6b-8934-7888-ae01-5cbd72057a8e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ConvertibleDebtNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_019fcd6b-8934-7b1c-8be5-fd1709128d47" xlink:to="loc_us-gaap_ConvertibleDebtNoncurrent_019fcd6b-8934-7888-ae01-5cbd72057a8e" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredIncomeTaxLiabilitiesNet_019fcd6b-8934-70a5-a17a-6ebae0f752fa" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DeferredIncomeTaxLiabilitiesNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_019fcd6b-8934-7b1c-8be5-fd1709128d47" xlink:to="loc_us-gaap_DeferredIncomeTaxLiabilitiesNet_019fcd6b-8934-70a5-a17a-6ebae0f752fa" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherLiabilitiesNoncurrent_019fcd6b-8934-7e81-84c0-6423b8d5ebaf" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherLiabilitiesNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_019fcd6b-8934-7b1c-8be5-fd1709128d47" xlink:to="loc_us-gaap_OtherLiabilitiesNoncurrent_019fcd6b-8934-7e81-84c0-6423b8d5ebaf" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Liabilities_019fcd6b-8934-7a82-9fc7-b49052d43fc1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_Liabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_019fcd6b-8934-7b1c-8be5-fd1709128d47" xlink:to="loc_us-gaap_Liabilities_019fcd6b-8934-7a82-9fc7-b49052d43fc1" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommitmentsAndContingencies_019fcd6b-8934-70b1-a2a5-0fc8d4e9572a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommitmentsAndContingencies"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_019fcd6b-8934-7b1c-8be5-fd1709128d47" xlink:to="loc_us-gaap_CommitmentsAndContingencies_019fcd6b-8934-70b1-a2a5-0fc8d4e9572a" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockValue_019fcd6b-8934-75dc-bd27-b3663ca67b02" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonStockValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_019fcd6b-8934-7b1c-8be5-fd1709128d47" xlink:to="loc_us-gaap_CommonStockValue_019fcd6b-8934-75dc-bd27-b3663ca67b02" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdditionalPaidInCapital_019fcd6b-8934-74e1-af25-3e9d5d232834" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AdditionalPaidInCapital"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_019fcd6b-8934-7b1c-8be5-fd1709128d47" xlink:to="loc_us-gaap_AdditionalPaidInCapital_019fcd6b-8934-74e1-af25-3e9d5d232834" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockValue_019fcd6b-8934-79ab-a0be-7e998b60e20b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TreasuryStockValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_019fcd6b-8934-7b1c-8be5-fd1709128d47" xlink:to="loc_us-gaap_TreasuryStockValue_019fcd6b-8934-79ab-a0be-7e998b60e20b" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_019fcd6b-8934-76e0-a67c-e4598289c47c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_019fcd6b-8934-7b1c-8be5-fd1709128d47" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_019fcd6b-8934-76e0-a67c-e4598289c47c" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetainedEarningsAccumulatedDeficit_019fcd6b-8934-7ed9-9f2b-784383ca37ec" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RetainedEarningsAccumulatedDeficit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_019fcd6b-8934-7b1c-8be5-fd1709128d47" xlink:to="loc_us-gaap_RetainedEarningsAccumulatedDeficit_019fcd6b-8934-7ed9-9f2b-784383ca37ec" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_019fcd6b-8934-7dbf-9112-2e6fb0b85142" 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_LiabilitiesAndStockholdersEquityAbstract_019fcd6b-8934-7b1c-8be5-fd1709128d47" xlink:to="loc_us-gaap_StockholdersEquity_019fcd6b-8934-7dbf-9112-2e6fb0b85142" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MinorityInterest_019fcd6b-8934-7e04-b9aa-516e742239e6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_MinorityInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_019fcd6b-8934-7b1c-8be5-fd1709128d47" xlink:to="loc_us-gaap_MinorityInterest_019fcd6b-8934-7e04-b9aa-516e742239e6" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_019fcd6b-8934-7c8d-abc3-8ae18a2e463e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_019fcd6b-8934-7b1c-8be5-fd1709128d47" xlink:to="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_019fcd6b-8934-7c8d-abc3-8ae18a2e463e" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesAndStockholdersEquity_019fcd6b-8934-70bf-91cc-4982e76eaf57" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LiabilitiesAndStockholdersEquity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_019fcd6b-8934-7b1c-8be5-fd1709128d47" xlink:to="loc_us-gaap_LiabilitiesAndStockholdersEquity_019fcd6b-8934-70bf-91cc-4982e76eaf57" xlink:type="arc" order="17"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://voyager.com/role/CONDENSEDCONSOLIDATEDBALANCESHEETSParenthetical" xlink:type="simple" xlink:href="voyg-20260930.xsd#CONDENSEDCONSOLIDATEDBALANCESHEETSParenthetical"/>
  <link:definitionLink xlink:role="http://voyager.com/role/CONDENSEDCONSOLIDATEDBALANCESHEETSParenthetical" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_019fcd6b-8934-71af-b26d-92fb5e905a80" 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_019fcd6b-8934-7027-a340-1f4bc772c18d" 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_019fcd6b-8934-71af-b26d-92fb5e905a80" xlink:to="loc_us-gaap_StatementTable_019fcd6b-8934-7027-a340-1f4bc772c18d" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementClassOfStockAxis_019fcd6b-8934-7196-98d9-f1383cb8053c" 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_StatementTable_019fcd6b-8934-7027-a340-1f4bc772c18d" xlink:to="loc_us-gaap_StatementClassOfStockAxis_019fcd6b-8934-7196-98d9-f1383cb8053c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_019fcd6b-8934-7196-98d9-f1383cb8053c_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_019fcd6b-8934-7196-98d9-f1383cb8053c" xlink:to="loc_us-gaap_ClassOfStockDomain_019fcd6b-8934-7196-98d9-f1383cb8053c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_019fcd6b-8934-7087-96bc-b5fb42af5de9" 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_019fcd6b-8934-7196-98d9-f1383cb8053c" xlink:to="loc_us-gaap_ClassOfStockDomain_019fcd6b-8934-7087-96bc-b5fb42af5de9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonClassAMember_019fcd6b-8934-70cf-a322-b06ded62e239" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonClassAMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_019fcd6b-8934-7087-96bc-b5fb42af5de9" xlink:to="loc_us-gaap_CommonClassAMember_019fcd6b-8934-70cf-a322-b06ded62e239" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonClassBMember_019fcd6b-8934-7827-8ee1-09f15e01f1ab" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonClassBMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_019fcd6b-8934-7087-96bc-b5fb42af5de9" xlink:to="loc_us-gaap_CommonClassBMember_019fcd6b-8934-7827-8ee1-09f15e01f1ab" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockParOrStatedValuePerShare_019fcd6b-8934-7622-96c6-f63d0600f57e" 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_StatementLineItems_019fcd6b-8934-71af-b26d-92fb5e905a80" xlink:to="loc_us-gaap_CommonStockParOrStatedValuePerShare_019fcd6b-8934-7622-96c6-f63d0600f57e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesAuthorized_019fcd6b-8934-7f55-9426-367ed51cd4ab" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonStockSharesAuthorized"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019fcd6b-8934-71af-b26d-92fb5e905a80" xlink:to="loc_us-gaap_CommonStockSharesAuthorized_019fcd6b-8934-7f55-9426-367ed51cd4ab" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesIssued_019fcd6b-8934-7505-b7d5-f10a16b9ab2c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonStockSharesIssued"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019fcd6b-8934-71af-b26d-92fb5e905a80" xlink:to="loc_us-gaap_CommonStockSharesIssued_019fcd6b-8934-7505-b7d5-f10a16b9ab2c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesOutstanding_019fcd6b-8934-730c-ab0a-aa0837636fdb" 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_StatementLineItems_019fcd6b-8934-71af-b26d-92fb5e905a80" xlink:to="loc_us-gaap_CommonStockSharesOutstanding_019fcd6b-8934-730c-ab0a-aa0837636fdb" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://voyager.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFEQUITYDEFICITandMEZZANINEEQUITY" xlink:type="simple" xlink:href="voyg-20260930.xsd#CONDENSEDCONSOLIDATEDSTATEMENTSOFEQUITYDEFICITandMEZZANINEEQUITY"/>
  <link:definitionLink xlink:role="http://voyager.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFEQUITYDEFICITandMEZZANINEEQUITY" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_019fcd6b-89e1-70ef-8ee4-bf253987f57b" 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_019fcd6b-89e1-7731-a445-2209d843eb22" 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_019fcd6b-89e1-70ef-8ee4-bf253987f57b" xlink:to="loc_us-gaap_StatementTable_019fcd6b-89e1-7731-a445-2209d843eb22" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementClassOfStockAxis_019fcd6b-89e1-78d7-bca3-983832ddc6e9" 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_StatementTable_019fcd6b-89e1-7731-a445-2209d843eb22" xlink:to="loc_us-gaap_StatementClassOfStockAxis_019fcd6b-89e1-78d7-bca3-983832ddc6e9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_019fcd6b-89e1-78d7-bca3-983832ddc6e9_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_019fcd6b-89e1-78d7-bca3-983832ddc6e9" xlink:to="loc_us-gaap_ClassOfStockDomain_019fcd6b-89e1-78d7-bca3-983832ddc6e9_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_019fcd6b-89e1-7044-a88b-f2f8460b1693" 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_019fcd6b-89e1-78d7-bca3-983832ddc6e9" xlink:to="loc_us-gaap_ClassOfStockDomain_019fcd6b-89e1-7044-a88b-f2f8460b1693" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonClassAMember_019fcd6b-89e1-793c-a0fc-7769b1841ff3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonClassAMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_019fcd6b-89e1-7044-a88b-f2f8460b1693" xlink:to="loc_us-gaap_CommonClassAMember_019fcd6b-89e1-793c-a0fc-7769b1841ff3" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonClassBMember_019fcd6b-89e1-7e5a-9cfc-9ce144430ce4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonClassBMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_019fcd6b-89e1-7044-a88b-f2f8460b1693" xlink:to="loc_us-gaap_CommonClassBMember_019fcd6b-89e1-7e5a-9cfc-9ce144430ce4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SeriesCPreferredStockMember_019fcd6b-89e1-79a4-88b9-8b18205c2d0c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SeriesCPreferredStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_019fcd6b-89e1-7044-a88b-f2f8460b1693" xlink:to="loc_us-gaap_SeriesCPreferredStockMember_019fcd6b-89e1-79a4-88b9-8b18205c2d0c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SeriesBPreferredStockMember_019fcd6b-89e1-7353-815f-ac5a5ca80700" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SeriesBPreferredStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_019fcd6b-89e1-7044-a88b-f2f8460b1693" xlink:to="loc_us-gaap_SeriesBPreferredStockMember_019fcd6b-89e1-7353-815f-ac5a5ca80700" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SeriesAPreferredStockMember_019fcd6b-89e1-717d-82df-00b878c1e2c2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SeriesAPreferredStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_019fcd6b-89e1-7044-a88b-f2f8460b1693" xlink:to="loc_us-gaap_SeriesAPreferredStockMember_019fcd6b-89e1-717d-82df-00b878c1e2c2" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_019fcd6b-89e1-7d6c-a1e9-67562af51c21" 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_019fcd6b-89e1-7731-a445-2209d843eb22" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_019fcd6b-89e1-7d6c-a1e9-67562af51c21" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_019fcd6b-89e1-7d6c-a1e9-67562af51c21_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_019fcd6b-89e1-7d6c-a1e9-67562af51c21" xlink:to="loc_us-gaap_EquityComponentDomain_019fcd6b-89e1-7d6c-a1e9-67562af51c21_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_019fcd6b-89e1-7f89-9503-c998ea85eebd" 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_019fcd6b-89e1-7d6c-a1e9-67562af51c21" xlink:to="loc_us-gaap_EquityComponentDomain_019fcd6b-89e1-7f89-9503-c998ea85eebd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ParentMember_019fcd6b-89e1-7a71-ad0f-50065f4bcc6e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ParentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_019fcd6b-89e1-7f89-9503-c998ea85eebd" xlink:to="loc_us-gaap_ParentMember_019fcd6b-89e1-7a71-ad0f-50065f4bcc6e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockMember_019fcd6b-89e1-7175-b33b-3d30b8b41908" 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_ParentMember_019fcd6b-89e1-7a71-ad0f-50065f4bcc6e" xlink:to="loc_us-gaap_CommonStockMember_019fcd6b-89e1-7175-b33b-3d30b8b41908" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PreferredStockMember_019fcd6b-89e1-776a-837a-e28ea1cb77ac" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PreferredStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ParentMember_019fcd6b-89e1-7a71-ad0f-50065f4bcc6e" xlink:to="loc_us-gaap_PreferredStockMember_019fcd6b-89e1-776a-837a-e28ea1cb77ac" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdditionalPaidInCapitalMember_019fcd6b-89e1-7d7f-a99c-f9f87b6de0b0" 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_ParentMember_019fcd6b-89e1-7a71-ad0f-50065f4bcc6e" xlink:to="loc_us-gaap_AdditionalPaidInCapitalMember_019fcd6b-89e1-7d7f-a99c-f9f87b6de0b0" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_019fcd6b-89e1-7239-84ae-823ed264a637" 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_ParentMember_019fcd6b-89e1-7a71-ad0f-50065f4bcc6e" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_019fcd6b-89e1-7239-84ae-823ed264a637" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetainedEarningsMember_019fcd6b-89e1-796d-88cc-a6b0d95c469f" 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_ParentMember_019fcd6b-89e1-7a71-ad0f-50065f4bcc6e" xlink:to="loc_us-gaap_RetainedEarningsMember_019fcd6b-89e1-796d-88cc-a6b0d95c469f" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockCommonMember_019fcd6b-89e1-74fe-91b9-be66f5dd1fa5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TreasuryStockCommonMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ParentMember_019fcd6b-89e1-7a71-ad0f-50065f4bcc6e" xlink:to="loc_us-gaap_TreasuryStockCommonMember_019fcd6b-89e1-74fe-91b9-be66f5dd1fa5" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NoncontrollingInterestMember_019fcd6b-89e1-701d-b2b9-a2e4da0e3dad" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NoncontrollingInterestMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_019fcd6b-89e1-7f89-9503-c998ea85eebd" xlink:to="loc_us-gaap_NoncontrollingInterestMember_019fcd6b-89e1-701d-b2b9-a2e4da0e3dad" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ShareRepurchaseProgramAxis_019fcd6b-89e1-7cbe-9c6c-934e66eec1d9" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ShareRepurchaseProgramAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_019fcd6b-89e1-7731-a445-2209d843eb22" xlink:to="loc_srt_ShareRepurchaseProgramAxis_019fcd6b-89e1-7cbe-9c6c-934e66eec1d9" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ShareRepurchaseProgramDomain_019fcd6b-89e1-7cbe-9c6c-934e66eec1d9_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ShareRepurchaseProgramDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ShareRepurchaseProgramAxis_019fcd6b-89e1-7cbe-9c6c-934e66eec1d9" xlink:to="loc_srt_ShareRepurchaseProgramDomain_019fcd6b-89e1-7cbe-9c6c-934e66eec1d9_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ShareRepurchaseProgramDomain_019fcd6b-89e1-75cf-82a8-f58c4b8cbe15" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ShareRepurchaseProgramDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ShareRepurchaseProgramAxis_019fcd6b-89e1-7cbe-9c6c-934e66eec1d9" xlink:to="loc_srt_ShareRepurchaseProgramDomain_019fcd6b-89e1-75cf-82a8-f58c4b8cbe15" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_voyg_PrepaidForwardTransactionMember_019fcd6b-89e1-77e7-9e8e-af9c7f9a2c1d" xlink:href="voyg-20260930.xsd#voyg_PrepaidForwardTransactionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ShareRepurchaseProgramDomain_019fcd6b-89e1-75cf-82a8-f58c4b8cbe15" xlink:to="loc_voyg_PrepaidForwardTransactionMember_019fcd6b-89e1-77e7-9e8e-af9c7f9a2c1d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConversionOfStockByUniqueDescriptionAxis_019fcd6b-89e1-71c9-a5d2-f8aa7545e8f1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ConversionOfStockByUniqueDescriptionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_019fcd6b-89e1-7731-a445-2209d843eb22" xlink:to="loc_us-gaap_ConversionOfStockByUniqueDescriptionAxis_019fcd6b-89e1-71c9-a5d2-f8aa7545e8f1" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConversionOfStockNameDomain_019fcd6b-89e1-71c9-a5d2-f8aa7545e8f1_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ConversionOfStockNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConversionOfStockByUniqueDescriptionAxis_019fcd6b-89e1-71c9-a5d2-f8aa7545e8f1" xlink:to="loc_us-gaap_ConversionOfStockNameDomain_019fcd6b-89e1-71c9-a5d2-f8aa7545e8f1_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConversionOfStockNameDomain_019fcd6b-89e1-7d63-bfa0-000bfab1389e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ConversionOfStockNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConversionOfStockByUniqueDescriptionAxis_019fcd6b-89e1-71c9-a5d2-f8aa7545e8f1" xlink:to="loc_us-gaap_ConversionOfStockNameDomain_019fcd6b-89e1-7d63-bfa0-000bfab1389e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_voyg_ConversionOfPreferredStockToClassACommonStockMember_019fcd6b-89e1-7c6e-ac14-360b6a6bc687" xlink:href="voyg-20260930.xsd#voyg_ConversionOfPreferredStockToClassACommonStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConversionOfStockNameDomain_019fcd6b-89e1-7d63-bfa0-000bfab1389e" xlink:to="loc_voyg_ConversionOfPreferredStockToClassACommonStockMember_019fcd6b-89e1-7c6e-ac14-360b6a6bc687" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_voyg_ConversionOfConvertibleDebtToClassACommonStockMember_019fcd6b-89e1-78ac-a49d-2ff241ea42be" xlink:href="voyg-20260930.xsd#voyg_ConversionOfConvertibleDebtToClassACommonStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConversionOfStockNameDomain_019fcd6b-89e1-7d63-bfa0-000bfab1389e" xlink:to="loc_voyg_ConversionOfConvertibleDebtToClassACommonStockMember_019fcd6b-89e1-78ac-a49d-2ff241ea42be" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_voyg_ConversionOfCommonStockToClassAAndClassBCommonStockMember_019fcd6b-89e1-7653-aa85-59d2efa3969d" xlink:href="voyg-20260930.xsd#voyg_ConversionOfCommonStockToClassAAndClassBCommonStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConversionOfStockNameDomain_019fcd6b-89e1-7d63-bfa0-000bfab1389e" xlink:to="loc_voyg_ConversionOfCommonStockToClassAAndClassBCommonStockMember_019fcd6b-89e1-7653-aa85-59d2efa3969d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_voyg_ConversionOfConvertibleDebtMember_019fcd6b-89e1-74ea-95c5-99b2e0f4ab71" xlink:href="voyg-20260930.xsd#voyg_ConversionOfConvertibleDebtMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConversionOfStockNameDomain_019fcd6b-89e1-7d63-bfa0-000bfab1389e" xlink:to="loc_voyg_ConversionOfConvertibleDebtMember_019fcd6b-89e1-74ea-95c5-99b2e0f4ab71" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsidiarySaleOfStockAxis_019fcd6b-89e1-7b28-a0ed-c88d383c72f9" 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_019fcd6b-89e1-7731-a445-2209d843eb22" xlink:to="loc_us-gaap_SubsidiarySaleOfStockAxis_019fcd6b-89e1-7b28-a0ed-c88d383c72f9" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SaleOfStockNameOfTransactionDomain_019fcd6b-89e1-7b28-a0ed-c88d383c72f9_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_019fcd6b-89e1-7b28-a0ed-c88d383c72f9" xlink:to="loc_us-gaap_SaleOfStockNameOfTransactionDomain_019fcd6b-89e1-7b28-a0ed-c88d383c72f9_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SaleOfStockNameOfTransactionDomain_019fcd6b-89e1-7eff-a3a7-c4d34d11d823" 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_019fcd6b-89e1-7b28-a0ed-c88d383c72f9" xlink:to="loc_us-gaap_SaleOfStockNameOfTransactionDomain_019fcd6b-89e1-7eff-a3a7-c4d34d11d823" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IPOMember_019fcd6b-89e1-7eca-a324-f1c0dd0d882c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IPOMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SaleOfStockNameOfTransactionDomain_019fcd6b-89e1-7eff-a3a7-c4d34d11d823" xlink:to="loc_us-gaap_IPOMember_019fcd6b-89e1-7eca-a324-f1c0dd0d882c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019fcd6b-89e1-7813-b578-986bbd36210a" 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_019fcd6b-89e1-70ef-8ee4-bf253987f57b" xlink:to="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019fcd6b-89e1-7813-b578-986bbd36210a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesOutstanding_019fcd6b-89e1-7c6d-982d-b56ad02e2750" 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_019fcd6b-89e1-7813-b578-986bbd36210a" xlink:to="loc_us-gaap_CommonStockSharesOutstanding_019fcd6b-89e1-7c6d-982d-b56ad02e2750" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_019fcd6b-89e1-78e1-bea7-c5af2e4b1f0b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019fcd6b-89e1-7813-b578-986bbd36210a" xlink:to="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_019fcd6b-89e1-78e1-bea7-c5af2e4b1f0b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PreferredStockSharesOutstanding_019fcd6b-89e1-7f0f-95bc-30ac313a93d4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PreferredStockSharesOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019fcd6b-89e1-7813-b578-986bbd36210a" xlink:to="loc_us-gaap_PreferredStockSharesOutstanding_019fcd6b-89e1-7f0f-95bc-30ac313a93d4" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockCommonShares_019fcd6b-89e1-7dbf-95dd-bd42fc5c662a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TreasuryStockCommonShares"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019fcd6b-89e1-7813-b578-986bbd36210a" xlink:to="loc_us-gaap_TreasuryStockCommonShares_019fcd6b-89e1-7dbf-95dd-bd42fc5c662a" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLossIncludingPortionAttributableToNonredeemableNoncontrollingInterest_019fcd6b-89e1-751b-8687-4143522de721" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetIncomeLossIncludingPortionAttributableToNonredeemableNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019fcd6b-89e1-7813-b578-986bbd36210a" xlink:to="loc_us-gaap_NetIncomeLossIncludingPortionAttributableToNonredeemableNoncontrollingInterest_019fcd6b-89e1-751b-8687-4143522de721" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax_019fcd6b-89e1-7216-bb3b-47b895dd69a4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019fcd6b-89e1-7813-b578-986bbd36210a" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax_019fcd6b-89e1-7216-bb3b-47b895dd69a4" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationStockOptionsRequisiteServicePeriodRecognition_019fcd6b-89e1-7822-8317-9583330f7722" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationStockOptionsRequisiteServicePeriodRecognition"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019fcd6b-89e1-7813-b578-986bbd36210a" xlink:to="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationStockOptionsRequisiteServicePeriodRecognition_019fcd6b-89e1-7822-8317-9583330f7722" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_019fcd6b-89e1-7318-854f-04f06d043d3d" 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_019fcd6b-89e1-7813-b578-986bbd36210a" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_019fcd6b-89e1-7318-854f-04f06d043d3d" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised_019fcd6b-89e1-7248-9fe9-8cb1ef63b5b3" 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_019fcd6b-89e1-7813-b578-986bbd36210a" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised_019fcd6b-89e1-7248-9fe9-8cb1ef63b5b3" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardGross_019fcd6b-89e1-77ab-a465-08eb2958b331" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019fcd6b-89e1-7813-b578-986bbd36210a" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardGross_019fcd6b-89e1-77ab-a465-08eb2958b331" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardForfeited_019fcd6b-89e1-74d8-847e-896164892f5a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardForfeited"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019fcd6b-89e1-7813-b578-986bbd36210a" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardForfeited_019fcd6b-89e1-74d8-847e-896164892f5a" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures_019fcd6b-89e1-7107-94d9-125c04f725cb" 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_019fcd6b-89e1-7813-b578-986bbd36210a" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures_019fcd6b-89e1-7107-94d9-125c04f725cb" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockRepurchasedAndRetiredDuringPeriodShares_019fcd6b-89e1-729a-9c5a-a2fcbe1aa84a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockRepurchasedAndRetiredDuringPeriodShares"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019fcd6b-89e1-7813-b578-986bbd36210a" xlink:to="loc_us-gaap_StockRepurchasedAndRetiredDuringPeriodShares_019fcd6b-89e1-729a-9c5a-a2fcbe1aa84a" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockRepurchasedAndRetiredDuringPeriodValue_019fcd6b-89e1-751f-b902-d0adf67b9855" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockRepurchasedAndRetiredDuringPeriodValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019fcd6b-89e1-7813-b578-986bbd36210a" xlink:to="loc_us-gaap_StockRepurchasedAndRetiredDuringPeriodValue_019fcd6b-89e1-751f-b902-d0adf67b9855" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesNewIssues_019fcd6b-89e2-792f-a859-46b8d60e09ef" 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_019fcd6b-89e1-7813-b578-986bbd36210a" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesNewIssues_019fcd6b-89e2-792f-a859-46b8d60e09ef" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueNewIssues_019fcd6b-89e2-767c-bb4d-3a50c7ab2fa8" 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_019fcd6b-89e1-7813-b578-986bbd36210a" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueNewIssues_019fcd6b-89e2-767c-bb4d-3a50c7ab2fa8" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesAcquisitions_019fcd6b-89e2-7d1c-9cc6-c444b22c5742" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockIssuedDuringPeriodSharesAcquisitions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019fcd6b-89e1-7813-b578-986bbd36210a" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesAcquisitions_019fcd6b-89e2-7d1c-9cc6-c444b22c5742" xlink:type="arc" order="17"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueAcquisitions_019fcd6b-89e2-78e3-baf5-ff25826bbc5b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockIssuedDuringPeriodValueAcquisitions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019fcd6b-89e1-7813-b578-986bbd36210a" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueAcquisitions_019fcd6b-89e2-78e3-baf5-ff25826bbc5b" xlink:type="arc" order="18"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityClassifiedWrittenCallOptionModificationDebtModificationIncreaseDecreaseInEquityAmount_01a13f3f-7073-7400-a63d-99e122797de8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EquityClassifiedWrittenCallOptionModificationDebtModificationIncreaseDecreaseInEquityAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019fcd6b-89e1-7813-b578-986bbd36210a" xlink:to="loc_us-gaap_EquityClassifiedWrittenCallOptionModificationDebtModificationIncreaseDecreaseInEquityAmount_01a13f3f-7073-7400-a63d-99e122797de8" xlink:type="arc" order="19"/>
    <link:loc xlink:type="locator" xlink:label="loc_voyg_AdditionalPaidInCapitalIncrementalIPOOfferingCosts_01a04289-ce68-73c0-b5ad-af1077a407a5" xlink:href="voyg-20260930.xsd#voyg_AdditionalPaidInCapitalIncrementalIPOOfferingCosts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019fcd6b-89e1-7813-b578-986bbd36210a" xlink:to="loc_voyg_AdditionalPaidInCapitalIncrementalIPOOfferingCosts_01a04289-ce68-73c0-b5ad-af1077a407a5" xlink:type="arc" order="20"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities_019fcd6b-89e2-76d3-9b4f-c747f7ae50cb" 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_019fcd6b-89e1-7813-b578-986bbd36210a" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities_019fcd6b-89e2-76d3-9b4f-c747f7ae50cb" xlink:type="arc" order="21"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueConversionOfConvertibleSecurities_019fcd6b-89e2-756f-acbc-402bd2874a49" 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_019fcd6b-89e1-7813-b578-986bbd36210a" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueConversionOfConvertibleSecurities_019fcd6b-89e2-756f-acbc-402bd2874a49" xlink:type="arc" order="22"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalDividendsInExcessOfRetainedEarnings_019fcd6b-89e2-7901-a800-30e3ea9ddf44" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AdjustmentsToAdditionalPaidInCapitalDividendsInExcessOfRetainedEarnings"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019fcd6b-89e1-7813-b578-986bbd36210a" xlink:to="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalDividendsInExcessOfRetainedEarnings_019fcd6b-89e2-7901-a800-30e3ea9ddf44" xlink:type="arc" order="23"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesIssuedForServices_019fcd6b-89e2-7106-b322-d793c8979cfb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockIssuedDuringPeriodSharesIssuedForServices"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019fcd6b-89e1-7813-b578-986bbd36210a" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesIssuedForServices_019fcd6b-89e2-7106-b322-d793c8979cfb" xlink:type="arc" order="24"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueIssuedForServices_019fcd6b-89e2-7ea3-861d-e551e6ac1051" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockIssuedDuringPeriodValueIssuedForServices"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019fcd6b-89e1-7813-b578-986bbd36210a" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueIssuedForServices_019fcd6b-89e2-7ea3-861d-e551e6ac1051" xlink:type="arc" order="25"/>
    <link:loc xlink:type="locator" xlink:label="loc_voyg_AdjustmentsToAdditionalPaidInCapitalWarrantsReclassificationFromLiabilityToEquity_019fcd6b-89e2-75b6-955e-94c5d0be9f8d" xlink:href="voyg-20260930.xsd#voyg_AdjustmentsToAdditionalPaidInCapitalWarrantsReclassificationFromLiabilityToEquity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019fcd6b-89e1-7813-b578-986bbd36210a" xlink:to="loc_voyg_AdjustmentsToAdditionalPaidInCapitalWarrantsReclassificationFromLiabilityToEquity_019fcd6b-89e2-75b6-955e-94c5d0be9f8d" xlink:type="arc" order="26"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalWarrantIssued_019fcd6b-89e2-751c-a1a0-d081db2f957a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AdjustmentsToAdditionalPaidInCapitalWarrantIssued"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019fcd6b-89e1-7813-b578-986bbd36210a" xlink:to="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalWarrantIssued_019fcd6b-89e2-751c-a1a0-d081db2f957a" xlink:type="arc" order="27"/>
    <link:loc xlink:type="locator" xlink:label="loc_voyg_StockIssuedDuringPeriodSharesPurchaseOfNoncontrollingInterest_019fcd6b-89e2-7ded-8af8-233d1ab75d4d" xlink:href="voyg-20260930.xsd#voyg_StockIssuedDuringPeriodSharesPurchaseOfNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019fcd6b-89e1-7813-b578-986bbd36210a" xlink:to="loc_voyg_StockIssuedDuringPeriodSharesPurchaseOfNoncontrollingInterest_019fcd6b-89e2-7ded-8af8-233d1ab75d4d" xlink:type="arc" order="28"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NoncontrollingInterestIncreaseFromSubsidiaryEquityIssuance_019fcd6b-89e2-78dd-9dc5-49558dfa5ee1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NoncontrollingInterestIncreaseFromSubsidiaryEquityIssuance"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019fcd6b-89e1-7813-b578-986bbd36210a" xlink:to="loc_us-gaap_NoncontrollingInterestIncreaseFromSubsidiaryEquityIssuance_019fcd6b-89e2-78dd-9dc5-49558dfa5ee1" xlink:type="arc" order="29"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NoncontrollingInterestIncreaseFromSaleOfParentEquityInterest_019fcd6b-89e2-779a-954f-3e139c23df31" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NoncontrollingInterestIncreaseFromSaleOfParentEquityInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019fcd6b-89e1-7813-b578-986bbd36210a" xlink:to="loc_us-gaap_NoncontrollingInterestIncreaseFromSaleOfParentEquityInterest_019fcd6b-89e2-779a-954f-3e139c23df31" xlink:type="arc" order="30"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesOutstanding_019fcd6b-89e2-79bd-b0d1-82e086c4b95e" 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_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_019fcd6b-89e2-7e27-9db8-a637bf47b33b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PreferredStockSharesOutstanding_019fcd6b-89e2-7b9f-a6ec-5cbb19d3a22e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PreferredStockSharesOutstanding"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockCommonShares_019fcd6b-89e2-781b-84f5-3a8b8de92bc4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TreasuryStockCommonShares"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInTemporaryEquityRollForward_019fcd6b-89e2-75ac-b23b-98939deba131" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncreaseDecreaseInTemporaryEquityRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019fcd6b-89e1-70ef-8ee4-bf253987f57b" xlink:to="loc_us-gaap_IncreaseDecreaseInTemporaryEquityRollForward_019fcd6b-89e2-75ac-b23b-98939deba131" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TemporaryEquityCarryingAmountIncludingPortionAttributableToNoncontrollingInterests_019fcd6b-89e2-7e0b-8089-519030790cb6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TemporaryEquityCarryingAmountIncludingPortionAttributableToNoncontrollingInterests"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInTemporaryEquityRollForward_019fcd6b-89e2-75ac-b23b-98939deba131" xlink:to="loc_us-gaap_TemporaryEquityCarryingAmountIncludingPortionAttributableToNoncontrollingInterests_019fcd6b-89e2-7e0b-8089-519030790cb6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TemporaryEquityNetIncome_019fcd6b-89e2-74e3-9b6f-32657970dd38" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TemporaryEquityNetIncome"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInTemporaryEquityRollForward_019fcd6b-89e2-75ac-b23b-98939deba131" xlink:to="loc_us-gaap_TemporaryEquityNetIncome_019fcd6b-89e2-74e3-9b6f-32657970dd38" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReclassificationsOfTemporaryToPermanentEquity_019fcd6b-89e2-73da-bd93-bb0284805eb4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ReclassificationsOfTemporaryToPermanentEquity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInTemporaryEquityRollForward_019fcd6b-89e2-75ac-b23b-98939deba131" xlink:to="loc_us-gaap_ReclassificationsOfTemporaryToPermanentEquity_019fcd6b-89e2-73da-bd93-bb0284805eb4" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TemporaryEquityAccretionOfDividends_019fcd6b-89e2-7de9-9b12-dcdd7b9b1e8f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TemporaryEquityAccretionOfDividends"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInTemporaryEquityRollForward_019fcd6b-89e2-75ac-b23b-98939deba131" xlink:to="loc_us-gaap_TemporaryEquityAccretionOfDividends_019fcd6b-89e2-7de9-9b12-dcdd7b9b1e8f" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_voyg_TemporaryEquityValueRedeemed_019fcd6b-89e2-783f-bf49-b43436467728" xlink:href="voyg-20260930.xsd#voyg_TemporaryEquityValueRedeemed"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInTemporaryEquityRollForward_019fcd6b-89e2-75ac-b23b-98939deba131" xlink:to="loc_voyg_TemporaryEquityValueRedeemed_019fcd6b-89e2-783f-bf49-b43436467728" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_voyg_TemporaryEquityDecreaseFromRedemptionsOrPurchaseOfInterests_019fcd6b-89e2-7d88-a079-34fe8b293fe0" xlink:href="voyg-20260930.xsd#voyg_TemporaryEquityDecreaseFromRedemptionsOrPurchaseOfInterests"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInTemporaryEquityRollForward_019fcd6b-89e2-75ac-b23b-98939deba131" xlink:to="loc_voyg_TemporaryEquityDecreaseFromRedemptionsOrPurchaseOfInterests_019fcd6b-89e2-7d88-a079-34fe8b293fe0" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TemporaryEquityCarryingAmountIncludingPortionAttributableToNoncontrollingInterests_019fcd6b-89e2-7eea-8d5c-54a87f71b17a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TemporaryEquityCarryingAmountIncludingPortionAttributableToNoncontrollingInterests"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://voyager.com/role/ORGANIZATIONDetails" xlink:type="simple" xlink:href="voyg-20260930.xsd#ORGANIZATIONDetails"/>
  <link:definitionLink xlink:role="http://voyager.com/role/ORGANIZATIONDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConversionOfStockLineItems_019fcd6b-89e2-736e-8782-534fe2febe51" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ConversionOfStockLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConversionOfStockTable_019fcd6b-89e2-7649-add7-7127fd2c9f09" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ConversionOfStockTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ConversionOfStockLineItems_019fcd6b-89e2-736e-8782-534fe2febe51" xlink:to="loc_us-gaap_ConversionOfStockTable_019fcd6b-89e2-7649-add7-7127fd2c9f09" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementClassOfStockAxis_019fcd6b-89e2-764d-9031-d167ed38b5f9" 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_ConversionOfStockTable_019fcd6b-89e2-7649-add7-7127fd2c9f09" xlink:to="loc_us-gaap_StatementClassOfStockAxis_019fcd6b-89e2-764d-9031-d167ed38b5f9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_019fcd6b-89e2-764d-9031-d167ed38b5f9_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_019fcd6b-89e2-764d-9031-d167ed38b5f9" xlink:to="loc_us-gaap_ClassOfStockDomain_019fcd6b-89e2-764d-9031-d167ed38b5f9_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_019fcd6b-89e2-7e68-b6e0-09889cffe30f" 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_019fcd6b-89e2-764d-9031-d167ed38b5f9" xlink:to="loc_us-gaap_ClassOfStockDomain_019fcd6b-89e2-7e68-b6e0-09889cffe30f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonClassAMember_019fcd6b-89e2-764b-b351-417b0d1bd1b5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonClassAMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_019fcd6b-89e2-7e68-b6e0-09889cffe30f" xlink:to="loc_us-gaap_CommonClassAMember_019fcd6b-89e2-764b-b351-417b0d1bd1b5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonClassBMember_019fcd6b-89e2-7146-a5b7-c32d112c922e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonClassBMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_019fcd6b-89e2-7e68-b6e0-09889cffe30f" xlink:to="loc_us-gaap_CommonClassBMember_019fcd6b-89e2-7146-a5b7-c32d112c922e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConversionOfStockByUniqueDescriptionAxis_019fcd6b-89e2-7a13-9a3c-ec3f5e8224ee" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ConversionOfStockByUniqueDescriptionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ConversionOfStockTable_019fcd6b-89e2-7649-add7-7127fd2c9f09" xlink:to="loc_us-gaap_ConversionOfStockByUniqueDescriptionAxis_019fcd6b-89e2-7a13-9a3c-ec3f5e8224ee" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConversionOfStockNameDomain_019fcd6b-89e2-7a13-9a3c-ec3f5e8224ee_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ConversionOfStockNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConversionOfStockByUniqueDescriptionAxis_019fcd6b-89e2-7a13-9a3c-ec3f5e8224ee" xlink:to="loc_us-gaap_ConversionOfStockNameDomain_019fcd6b-89e2-7a13-9a3c-ec3f5e8224ee_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConversionOfStockNameDomain_019fcd6b-89e2-7f6c-aff5-8da45cfe3a51" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ConversionOfStockNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConversionOfStockByUniqueDescriptionAxis_019fcd6b-89e2-7a13-9a3c-ec3f5e8224ee" xlink:to="loc_us-gaap_ConversionOfStockNameDomain_019fcd6b-89e2-7f6c-aff5-8da45cfe3a51" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_voyg_ClassA1PreferredStockClassBPreferredStockClassCPreferredStockAndItsPromissoryNoteMember_019fcd6b-89e2-79a9-bf52-7f240bb6f7e2" xlink:href="voyg-20260930.xsd#voyg_ClassA1PreferredStockClassBPreferredStockClassCPreferredStockAndItsPromissoryNoteMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConversionOfStockNameDomain_019fcd6b-89e2-7f6c-aff5-8da45cfe3a51" xlink:to="loc_voyg_ClassA1PreferredStockClassBPreferredStockClassCPreferredStockAndItsPromissoryNoteMember_019fcd6b-89e2-79a9-bf52-7f240bb6f7e2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsidiarySaleOfStockAxis_019fcd6b-89e2-727d-b1d4-fae4dc04ea3e" 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_ConversionOfStockTable_019fcd6b-89e2-7649-add7-7127fd2c9f09" xlink:to="loc_us-gaap_SubsidiarySaleOfStockAxis_019fcd6b-89e2-727d-b1d4-fae4dc04ea3e" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SaleOfStockNameOfTransactionDomain_019fcd6b-89e2-727d-b1d4-fae4dc04ea3e_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_019fcd6b-89e2-727d-b1d4-fae4dc04ea3e" xlink:to="loc_us-gaap_SaleOfStockNameOfTransactionDomain_019fcd6b-89e2-727d-b1d4-fae4dc04ea3e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SaleOfStockNameOfTransactionDomain_019fcd6b-89e2-71ab-8a7c-00f1dd34939b" 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_019fcd6b-89e2-727d-b1d4-fae4dc04ea3e" xlink:to="loc_us-gaap_SaleOfStockNameOfTransactionDomain_019fcd6b-89e2-71ab-8a7c-00f1dd34939b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IPOMember_019fcd6b-89e2-7c1b-8ba6-a9ade4fdbbdd" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IPOMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SaleOfStockNameOfTransactionDomain_019fcd6b-89e2-71ab-8a7c-00f1dd34939b" xlink:to="loc_us-gaap_IPOMember_019fcd6b-89e2-7c1b-8ba6-a9ade4fdbbdd" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OverAllotmentOptionMember_019fcd6b-89e2-7201-9ba2-982569c623ce" 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_019fcd6b-89e2-71ab-8a7c-00f1dd34939b" xlink:to="loc_us-gaap_OverAllotmentOptionMember_019fcd6b-89e2-7201-9ba2-982569c623ce" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_TitleOfIndividualAxis_019fcd6b-89e2-77fa-ba5a-424543dab967" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_TitleOfIndividualAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ConversionOfStockTable_019fcd6b-89e2-7649-add7-7127fd2c9f09" xlink:to="loc_srt_TitleOfIndividualAxis_019fcd6b-89e2-77fa-ba5a-424543dab967" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_TitleOfIndividualWithRelationshipToEntityDomain_019fcd6b-89e2-77fa-ba5a-424543dab967_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_TitleOfIndividualWithRelationshipToEntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_TitleOfIndividualAxis_019fcd6b-89e2-77fa-ba5a-424543dab967" xlink:to="loc_srt_TitleOfIndividualWithRelationshipToEntityDomain_019fcd6b-89e2-77fa-ba5a-424543dab967_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_TitleOfIndividualWithRelationshipToEntityDomain_019fcd6b-89e2-7dcc-a81b-18e0466b00df" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_TitleOfIndividualWithRelationshipToEntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_TitleOfIndividualAxis_019fcd6b-89e2-77fa-ba5a-424543dab967" xlink:to="loc_srt_TitleOfIndividualWithRelationshipToEntityDomain_019fcd6b-89e2-7dcc-a81b-18e0466b00df" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ChiefExecutiveOfficerMember_019fcd6b-89e2-7587-8086-9e9a80681af2" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ChiefExecutiveOfficerMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_TitleOfIndividualWithRelationshipToEntityDomain_019fcd6b-89e2-7dcc-a81b-18e0466b00df" xlink:to="loc_srt_ChiefExecutiveOfficerMember_019fcd6b-89e2-7587-8086-9e9a80681af2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NumberOfOperatingSegments_019fcd6b-89e2-7a82-9a36-a9fc4b00a546" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NumberOfOperatingSegments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConversionOfStockLineItems_019fcd6b-89e2-736e-8782-534fe2febe51" xlink:to="loc_us-gaap_NumberOfOperatingSegments_019fcd6b-89e2-7a82-9a36-a9fc4b00a546" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NumberOfReportableSegments_019fcd6b-89e2-7602-bcfd-eef5be8f428f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NumberOfReportableSegments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConversionOfStockLineItems_019fcd6b-89e2-736e-8782-534fe2febe51" xlink:to="loc_us-gaap_NumberOfReportableSegments_019fcd6b-89e2-7602-bcfd-eef5be8f428f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction_019fcd6b-89e2-7b33-b9c2-e2d45eeb75d8" 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_ConversionOfStockLineItems_019fcd6b-89e2-736e-8782-534fe2febe51" xlink:to="loc_us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction_019fcd6b-89e2-7b33-b9c2-e2d45eeb75d8" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockParOrStatedValuePerShare_019fcd6b-89e2-795b-b69c-3cb256d29d65" 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_ConversionOfStockLineItems_019fcd6b-89e2-736e-8782-534fe2febe51" xlink:to="loc_us-gaap_CommonStockParOrStatedValuePerShare_019fcd6b-89e2-795b-b69c-3cb256d29d65" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SaleOfStockPricePerShare_019fcd6b-89e2-7a2d-9dff-d1ebfa47723a" 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_ConversionOfStockLineItems_019fcd6b-89e2-736e-8782-534fe2febe51" xlink:to="loc_us-gaap_SaleOfStockPricePerShare_019fcd6b-89e2-7a2d-9dff-d1ebfa47723a" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromIssuanceInitialPublicOffering_019fcd6b-89e2-72fd-9ff8-f9d35077ea0a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ProceedsFromIssuanceInitialPublicOffering"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConversionOfStockLineItems_019fcd6b-89e2-736e-8782-534fe2febe51" xlink:to="loc_us-gaap_ProceedsFromIssuanceInitialPublicOffering_019fcd6b-89e2-72fd-9ff8-f9d35077ea0a" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConversionOfStockSharesConverted1_019fcd6b-89e2-70c7-bb47-3c6c273ba6a3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ConversionOfStockSharesConverted1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConversionOfStockLineItems_019fcd6b-89e2-736e-8782-534fe2febe51" xlink:to="loc_us-gaap_ConversionOfStockSharesConverted1_019fcd6b-89e2-70c7-bb47-3c6c273ba6a3" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConversionOfStockSharesIssued1_019fcd6b-89e2-71fc-b178-c450395599bb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ConversionOfStockSharesIssued1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConversionOfStockLineItems_019fcd6b-89e2-736e-8782-534fe2febe51" xlink:to="loc_us-gaap_ConversionOfStockSharesIssued1_019fcd6b-89e2-71fc-b178-c450395599bb" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetainedEarningsAccumulatedDeficit_019fcd6b-89e2-7093-b70c-677c9d143214" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RetainedEarningsAccumulatedDeficit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConversionOfStockLineItems_019fcd6b-89e2-736e-8782-534fe2febe51" xlink:to="loc_us-gaap_RetainedEarningsAccumulatedDeficit_019fcd6b-89e2-7093-b70c-677c9d143214" xlink:type="arc" order="8"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://voyager.com/role/ACQUISITIONSNarrativeDetails" xlink:type="simple" xlink:href="voyg-20260930.xsd#ACQUISITIONSNarrativeDetails"/>
  <link:definitionLink xlink:role="http://voyager.com/role/ACQUISITIONSNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionLineItems_019fcd6b-89e2-7894-8293-68bb7cbcfb35" 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_019fcd6b-89e2-76de-8535-babef5e7ea91" 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_019fcd6b-89e2-7894-8293-68bb7cbcfb35" xlink:to="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_019fcd6b-89e2-76de-8535-babef5e7ea91" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_019fcd6b-89e2-75d1-8800-3beb6bcd7626" 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_019fcd6b-89e2-76de-8535-babef5e7ea91" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_019fcd6b-89e2-75d1-8800-3beb6bcd7626" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019fcd6b-89e2-75d1-8800-3beb6bcd7626_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_019fcd6b-89e2-75d1-8800-3beb6bcd7626" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019fcd6b-89e2-75d1-8800-3beb6bcd7626_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019fcd6b-89e2-7101-85df-42da80daa030" 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_019fcd6b-89e2-75d1-8800-3beb6bcd7626" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019fcd6b-89e2-7101-85df-42da80daa030" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_voyg_AstroboticTechnologyIncMember_01a041f1-33d2-7f0d-aac4-ec00a319d49a" xlink:href="voyg-20260930.xsd#voyg_AstroboticTechnologyIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019fcd6b-89e2-7101-85df-42da80daa030" xlink:to="loc_voyg_AstroboticTechnologyIncMember_01a041f1-33d2-7f0d-aac4-ec00a319d49a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_voyg_ExoTerraResourceLLCMember_019fcd6b-89e2-7eaa-8f4d-1511d084c573" xlink:href="voyg-20260930.xsd#voyg_ExoTerraResourceLLCMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019fcd6b-89e2-7101-85df-42da80daa030" xlink:to="loc_voyg_ExoTerraResourceLLCMember_019fcd6b-89e2-7eaa-8f4d-1511d084c573" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_voyg_EstesEnergeticsMember_019fcd6b-89e2-7662-b69b-fc125ef9ea04" xlink:href="voyg-20260930.xsd#voyg_EstesEnergeticsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019fcd6b-89e2-7101-85df-42da80daa030" xlink:to="loc_voyg_EstesEnergeticsMember_019fcd6b-89e2-7662-b69b-fc125ef9ea04" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_voyg_ExoTerraAndEstesMember_019fcd6b-89e2-7dd4-b74a-7981a7f12040" xlink:href="voyg-20260930.xsd#voyg_ExoTerraAndEstesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019fcd6b-89e2-7101-85df-42da80daa030" xlink:to="loc_voyg_ExoTerraAndEstesMember_019fcd6b-89e2-7dd4-b74a-7981a7f12040" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_voyg_ElectroMagneticSystemsInc.Member_019fcd6b-89e2-73d5-846d-e6fd732b3925" xlink:href="voyg-20260930.xsd#voyg_ElectroMagneticSystemsInc.Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019fcd6b-89e2-7101-85df-42da80daa030" xlink:to="loc_voyg_ElectroMagneticSystemsInc.Member_019fcd6b-89e2-73d5-846d-e6fd732b3925" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_voyg_OpticalPhysicsCompanyInc.Member_019fcd6b-89e2-78ab-b168-44980f26090b" xlink:href="voyg-20260930.xsd#voyg_OpticalPhysicsCompanyInc.Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019fcd6b-89e2-7101-85df-42da80daa030" xlink:to="loc_voyg_OpticalPhysicsCompanyInc.Member_019fcd6b-89e2-78ab-b168-44980f26090b" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_019fcd6b-89e2-7bbc-abff-9c2a31bc7327" 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_019fcd6b-89e2-76de-8535-babef5e7ea91" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_019fcd6b-89e2-7bbc-abff-9c2a31bc7327" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019fcd6b-89e2-7bbc-abff-9c2a31bc7327_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_019fcd6b-89e2-7bbc-abff-9c2a31bc7327" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019fcd6b-89e2-7bbc-abff-9c2a31bc7327_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019fcd6b-89e2-7539-bd3e-b3e124f1c036" 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_019fcd6b-89e2-7bbc-abff-9c2a31bc7327" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019fcd6b-89e2-7539-bd3e-b3e124f1c036" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DevelopedTechnologyRightsMember_019fcd6b-89e2-7078-93fb-b62c150402ad" 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_019fcd6b-89e2-7539-bd3e-b3e124f1c036" xlink:to="loc_us-gaap_DevelopedTechnologyRightsMember_019fcd6b-89e2-7078-93fb-b62c150402ad" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_voyg_CustomerRelationshipsBacklogMember_019fcd6b-89e2-7712-b82a-c667807f70bd" xlink:href="voyg-20260930.xsd#voyg_CustomerRelationshipsBacklogMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019fcd6b-89e2-7539-bd3e-b3e124f1c036" xlink:to="loc_voyg_CustomerRelationshipsBacklogMember_019fcd6b-89e2-7712-b82a-c667807f70bd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_019fcd6b-89e2-7497-ad1d-434993488c0c" 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_ScheduleOfBusinessAcquisitionsByAcquisitionTable_019fcd6b-89e2-76de-8535-babef5e7ea91" xlink:to="loc_srt_RangeAxis_019fcd6b-89e2-7497-ad1d-434993488c0c" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019fcd6b-89e2-7497-ad1d-434993488c0c_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_019fcd6b-89e2-7497-ad1d-434993488c0c" xlink:to="loc_srt_RangeMember_019fcd6b-89e2-7497-ad1d-434993488c0c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019fcd6b-89e2-7091-b6cf-299e633750b3" 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_019fcd6b-89e2-7497-ad1d-434993488c0c" xlink:to="loc_srt_RangeMember_019fcd6b-89e2-7091-b6cf-299e633750b3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_019fcd6b-89e2-76f0-9c78-8a09f1bcb75f" 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_019fcd6b-89e2-7091-b6cf-299e633750b3" xlink:to="loc_srt_MinimumMember_019fcd6b-89e2-76f0-9c78-8a09f1bcb75f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_019fcd6b-89e2-7900-8404-203575708a10" 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_019fcd6b-89e2-7091-b6cf-299e633750b3" xlink:to="loc_srt_MaximumMember_019fcd6b-89e2-7900-8404-203575708a10" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementOfFinancialPositionLocationBalanceAxis_01a15cde-2a61-7989-be82-6f8771fd6755" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementOfFinancialPositionLocationBalanceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_019fcd6b-89e2-76de-8535-babef5e7ea91" xlink:to="loc_us-gaap_StatementOfFinancialPositionLocationBalanceAxis_01a15cde-2a61-7989-be82-6f8771fd6755" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired_019fcd6b-89e2-7b5d-ac64-cee0c0f7969e" 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_019fcd6b-89e2-7894-8293-68bb7cbcfb35" xlink:to="loc_us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired_019fcd6b-89e2-7b5d-ac64-cee0c0f7969e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationConsiderationTransferred1_019fcd6b-89e2-71fe-9e03-8def87675e30" 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_019fcd6b-89e2-7894-8293-68bb7cbcfb35" xlink:to="loc_us-gaap_BusinessCombinationConsiderationTransferred1_019fcd6b-89e2-71fe-9e03-8def87675e30" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquireBusinessesGross_019fcd6b-89e2-7ed4-846f-9a2bba56d1b4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PaymentsToAcquireBusinessesGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019fcd6b-89e2-7894-8293-68bb7cbcfb35" xlink:to="loc_us-gaap_PaymentsToAcquireBusinessesGross_019fcd6b-89e2-7ed4-846f-9a2bba56d1b4" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable_019fcd6b-89e2-7b89-b50a-6adb7b03823f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019fcd6b-89e2-7894-8293-68bb7cbcfb35" xlink:to="loc_us-gaap_BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable_019fcd6b-89e2-7b89-b50a-6adb7b03823f" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationContingentConsiderationLiability_019fcd6b-89e2-70c6-9fd0-f2cb1c30cd37" 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_019fcd6b-89e2-7894-8293-68bb7cbcfb35" xlink:to="loc_us-gaap_BusinessCombinationContingentConsiderationLiability_019fcd6b-89e2-70c6-9fd0-f2cb1c30cd37" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_voyg_BusinessCombinationContingentConsiderationSettledAmount_01a17754-bb9f-7159-867e-e879e790597d" xlink:href="voyg-20260930.xsd#voyg_BusinessCombinationContingentConsiderationSettledAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019fcd6b-89e2-7894-8293-68bb7cbcfb35" xlink:to="loc_voyg_BusinessCombinationContingentConsiderationSettledAmount_01a17754-bb9f-7159-867e-e879e790597d" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentForContingentConsiderationLiabilityInvestingActivities_01a17996-4581-7374-ada1-e10dc5edd279" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PaymentForContingentConsiderationLiabilityInvestingActivities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019fcd6b-89e2-7894-8293-68bb7cbcfb35" xlink:to="loc_us-gaap_PaymentForContingentConsiderationLiabilityInvestingActivities_01a17996-4581-7374-ada1-e10dc5edd279" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_voyg_BusinessCombinationContingentConsiderationEquityInterestShareIssuedValue_01a17754-bb9f-7134-9391-1653c05692f3" xlink:href="voyg-20260930.xsd#voyg_BusinessCombinationContingentConsiderationEquityInterestShareIssuedValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019fcd6b-89e2-7894-8293-68bb7cbcfb35" xlink:to="loc_voyg_BusinessCombinationContingentConsiderationEquityInterestShareIssuedValue_01a17754-bb9f-7134-9391-1653c05692f3" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueHigh_01a17998-f79b-77ce-ba74-2af51e9700a7" 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_019fcd6b-89e2-7894-8293-68bb7cbcfb35" xlink:to="loc_us-gaap_BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueHigh_01a17998-f79b-77ce-ba74-2af51e9700a7" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationAcquisitionRelatedCosts_01a05c30-6cf4-7ef3-8d0e-bcac519546a9" 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_019fcd6b-89e2-7894-8293-68bb7cbcfb35" xlink:to="loc_us-gaap_BusinessCombinationAcquisitionRelatedCosts_01a05c30-6cf4-7ef3-8d0e-bcac519546a9" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProvisionForLossOnContracts_01a13f6e-b14b-7821-a61a-cad6dc8f03b6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ProvisionForLossOnContracts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019fcd6b-89e2-7894-8293-68bb7cbcfb35" xlink:to="loc_us-gaap_ProvisionForLossOnContracts_01a13f6e-b14b-7821-a61a-cad6dc8f03b6" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_voyg_BusinessCombinationProFormaInformationDepreciationAndAmortizationAdjustments_01a10b4c-19d1-7697-a348-423cfb879129" xlink:href="voyg-20260930.xsd#voyg_BusinessCombinationProFormaInformationDepreciationAndAmortizationAdjustments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019fcd6b-89e2-7894-8293-68bb7cbcfb35" xlink:to="loc_voyg_BusinessCombinationProFormaInformationDepreciationAndAmortizationAdjustments_01a10b4c-19d1-7697-a348-423cfb879129" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_voyg_BusinessCombinationWorkingCapitalAdjustment_019fcd6b-89e2-780e-9fb1-b6cdb62d188b" xlink:href="voyg-20260930.xsd#voyg_BusinessCombinationWorkingCapitalAdjustment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019fcd6b-89e2-7894-8293-68bb7cbcfb35" xlink:to="loc_voyg_BusinessCombinationWorkingCapitalAdjustment_019fcd6b-89e2-780e-9fb1-b6cdb62d188b" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_voyg_BusinessCombinationPaymentOfWorkingCapitalAdjustment_019fcd6b-89e2-73b1-aa82-d2b7c33b5a1e" xlink:href="voyg-20260930.xsd#voyg_BusinessCombinationPaymentOfWorkingCapitalAdjustment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019fcd6b-89e2-7894-8293-68bb7cbcfb35" xlink:to="loc_voyg_BusinessCombinationPaymentOfWorkingCapitalAdjustment_019fcd6b-89e2-73b1-aa82-d2b7c33b5a1e" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationConsiderationTransferredLiabilitiesIncurred_019fcd6b-89e2-7d6b-9fa8-cb0023a99f79" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessCombinationConsiderationTransferredLiabilitiesIncurred"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019fcd6b-89e2-7894-8293-68bb7cbcfb35" xlink:to="loc_us-gaap_BusinessCombinationConsiderationTransferredLiabilitiesIncurred_019fcd6b-89e2-7d6b-9fa8-cb0023a99f79" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment_019fcd6b-89e2-7f70-b726-b093b2d8c3fd" 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_BusinessAcquisitionLineItems_019fcd6b-89e2-7894-8293-68bb7cbcfb35" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment_019fcd6b-89e2-7f70-b726-b093b2d8c3fd" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill_019fcd6b-89e2-760a-8074-6d21164abbd8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019fcd6b-89e2-7894-8293-68bb7cbcfb35" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill_019fcd6b-89e2-760a-8074-6d21164abbd8" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Goodwill_019fcd6b-89e2-727a-b3c7-48153a5131ff" 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_019fcd6b-89e2-7894-8293-68bb7cbcfb35" xlink:to="loc_us-gaap_Goodwill_019fcd6b-89e2-727a-b3c7-48153a5131ff" xlink:type="arc" order="17"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities_019fcd6b-89e2-7a87-a019-4cec76f03be9" 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_BusinessAcquisitionLineItems_019fcd6b-89e2-7894-8293-68bb7cbcfb35" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities_019fcd6b-89e2-7a87-a019-4cec76f03be9" xlink:type="arc" order="18"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetUsefulLife_019fcd6b-89e2-7bf1-b9ef-eb43b9ca9780" 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_019fcd6b-89e2-7894-8293-68bb7cbcfb35" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetUsefulLife_019fcd6b-89e2-7bf1-b9ef-eb43b9ca9780" xlink:type="arc" order="19"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsRemainingAmortizationPeriod1_019fcd6b-89e2-748f-847d-8493226b4198" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FiniteLivedIntangibleAssetsRemainingAmortizationPeriod1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019fcd6b-89e2-7894-8293-68bb7cbcfb35" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsRemainingAmortizationPeriod1_019fcd6b-89e2-748f-847d-8493226b4198" xlink:type="arc" order="20"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://voyager.com/role/ACQUISITIONSNarrativeDetails_1" xlink:type="simple" xlink:href="voyg-20260930.xsd#ACQUISITIONSNarrativeDetails_1"/>
  <link:definitionLink xlink:role="http://voyager.com/role/ACQUISITIONSNarrativeDetails_1" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionLineItems_019fcd6b-89e2-7894-8293-68bb7cbcfb35" 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_019fcd6b-89e2-76de-8535-babef5e7ea91" 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_019fcd6b-89e2-7894-8293-68bb7cbcfb35" xlink:to="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_019fcd6b-89e2-76de-8535-babef5e7ea91" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_019fcd6b-89e2-75d1-8800-3beb6bcd7626" 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_019fcd6b-89e2-76de-8535-babef5e7ea91" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_019fcd6b-89e2-75d1-8800-3beb6bcd7626" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019fcd6b-89e2-75d1-8800-3beb6bcd7626_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_019fcd6b-89e2-75d1-8800-3beb6bcd7626" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019fcd6b-89e2-75d1-8800-3beb6bcd7626_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019fcd6b-89e2-7101-85df-42da80daa030" 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_019fcd6b-89e2-75d1-8800-3beb6bcd7626" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019fcd6b-89e2-7101-85df-42da80daa030" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_voyg_AstroboticTechnologyIncMember_01a041f1-33d2-7f0d-aac4-ec00a319d49a" xlink:href="voyg-20260930.xsd#voyg_AstroboticTechnologyIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019fcd6b-89e2-7101-85df-42da80daa030" xlink:to="loc_voyg_AstroboticTechnologyIncMember_01a041f1-33d2-7f0d-aac4-ec00a319d49a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_voyg_ExoTerraResourceLLCMember_019fcd6b-89e2-7eaa-8f4d-1511d084c573" xlink:href="voyg-20260930.xsd#voyg_ExoTerraResourceLLCMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019fcd6b-89e2-7101-85df-42da80daa030" xlink:to="loc_voyg_ExoTerraResourceLLCMember_019fcd6b-89e2-7eaa-8f4d-1511d084c573" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_voyg_EstesEnergeticsMember_019fcd6b-89e2-7662-b69b-fc125ef9ea04" xlink:href="voyg-20260930.xsd#voyg_EstesEnergeticsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019fcd6b-89e2-7101-85df-42da80daa030" xlink:to="loc_voyg_EstesEnergeticsMember_019fcd6b-89e2-7662-b69b-fc125ef9ea04" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_voyg_ExoTerraAndEstesMember_019fcd6b-89e2-7dd4-b74a-7981a7f12040" xlink:href="voyg-20260930.xsd#voyg_ExoTerraAndEstesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019fcd6b-89e2-7101-85df-42da80daa030" xlink:to="loc_voyg_ExoTerraAndEstesMember_019fcd6b-89e2-7dd4-b74a-7981a7f12040" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_voyg_ElectroMagneticSystemsInc.Member_019fcd6b-89e2-73d5-846d-e6fd732b3925" xlink:href="voyg-20260930.xsd#voyg_ElectroMagneticSystemsInc.Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019fcd6b-89e2-7101-85df-42da80daa030" xlink:to="loc_voyg_ElectroMagneticSystemsInc.Member_019fcd6b-89e2-73d5-846d-e6fd732b3925" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_voyg_OpticalPhysicsCompanyInc.Member_019fcd6b-89e2-78ab-b168-44980f26090b" xlink:href="voyg-20260930.xsd#voyg_OpticalPhysicsCompanyInc.Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019fcd6b-89e2-7101-85df-42da80daa030" xlink:to="loc_voyg_OpticalPhysicsCompanyInc.Member_019fcd6b-89e2-78ab-b168-44980f26090b" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_019fcd6b-89e2-7bbc-abff-9c2a31bc7327" 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_019fcd6b-89e2-76de-8535-babef5e7ea91" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_019fcd6b-89e2-7bbc-abff-9c2a31bc7327" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019fcd6b-89e2-7bbc-abff-9c2a31bc7327_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_019fcd6b-89e2-7bbc-abff-9c2a31bc7327" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019fcd6b-89e2-7bbc-abff-9c2a31bc7327_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019fcd6b-89e2-7539-bd3e-b3e124f1c036" 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_019fcd6b-89e2-7bbc-abff-9c2a31bc7327" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019fcd6b-89e2-7539-bd3e-b3e124f1c036" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DevelopedTechnologyRightsMember_019fcd6b-89e2-7078-93fb-b62c150402ad" 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_019fcd6b-89e2-7539-bd3e-b3e124f1c036" xlink:to="loc_us-gaap_DevelopedTechnologyRightsMember_019fcd6b-89e2-7078-93fb-b62c150402ad" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_voyg_CustomerRelationshipsBacklogMember_019fcd6b-89e2-7712-b82a-c667807f70bd" xlink:href="voyg-20260930.xsd#voyg_CustomerRelationshipsBacklogMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019fcd6b-89e2-7539-bd3e-b3e124f1c036" xlink:to="loc_voyg_CustomerRelationshipsBacklogMember_019fcd6b-89e2-7712-b82a-c667807f70bd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_019fcd6b-89e2-7497-ad1d-434993488c0c" 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_ScheduleOfBusinessAcquisitionsByAcquisitionTable_019fcd6b-89e2-76de-8535-babef5e7ea91" xlink:to="loc_srt_RangeAxis_019fcd6b-89e2-7497-ad1d-434993488c0c" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019fcd6b-89e2-7497-ad1d-434993488c0c_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_019fcd6b-89e2-7497-ad1d-434993488c0c" xlink:to="loc_srt_RangeMember_019fcd6b-89e2-7497-ad1d-434993488c0c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019fcd6b-89e2-7091-b6cf-299e633750b3" 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_019fcd6b-89e2-7497-ad1d-434993488c0c" xlink:to="loc_srt_RangeMember_019fcd6b-89e2-7091-b6cf-299e633750b3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_019fcd6b-89e2-76f0-9c78-8a09f1bcb75f" 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_019fcd6b-89e2-7091-b6cf-299e633750b3" xlink:to="loc_srt_MinimumMember_019fcd6b-89e2-76f0-9c78-8a09f1bcb75f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_019fcd6b-89e2-7900-8404-203575708a10" 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_019fcd6b-89e2-7091-b6cf-299e633750b3" xlink:to="loc_srt_MaximumMember_019fcd6b-89e2-7900-8404-203575708a10" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired_019fcd6b-89e2-7b5d-ac64-cee0c0f7969e" 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_019fcd6b-89e2-7894-8293-68bb7cbcfb35" xlink:to="loc_us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired_019fcd6b-89e2-7b5d-ac64-cee0c0f7969e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationConsiderationTransferred1_019fcd6b-89e2-71fe-9e03-8def87675e30" 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_019fcd6b-89e2-7894-8293-68bb7cbcfb35" xlink:to="loc_us-gaap_BusinessCombinationConsiderationTransferred1_019fcd6b-89e2-71fe-9e03-8def87675e30" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquireBusinessesGross_019fcd6b-89e2-7ed4-846f-9a2bba56d1b4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PaymentsToAcquireBusinessesGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019fcd6b-89e2-7894-8293-68bb7cbcfb35" xlink:to="loc_us-gaap_PaymentsToAcquireBusinessesGross_019fcd6b-89e2-7ed4-846f-9a2bba56d1b4" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable_019fcd6b-89e2-7b89-b50a-6adb7b03823f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019fcd6b-89e2-7894-8293-68bb7cbcfb35" xlink:to="loc_us-gaap_BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable_019fcd6b-89e2-7b89-b50a-6adb7b03823f" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationContingentConsiderationLiability_019fcd6b-89e2-70c6-9fd0-f2cb1c30cd37" 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_019fcd6b-89e2-7894-8293-68bb7cbcfb35" xlink:to="loc_us-gaap_BusinessCombinationContingentConsiderationLiability_019fcd6b-89e2-70c6-9fd0-f2cb1c30cd37" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_voyg_BusinessCombinationContingentConsiderationSettledAmount_01a17754-bb9f-7159-867e-e879e790597d" xlink:href="voyg-20260930.xsd#voyg_BusinessCombinationContingentConsiderationSettledAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019fcd6b-89e2-7894-8293-68bb7cbcfb35" xlink:to="loc_voyg_BusinessCombinationContingentConsiderationSettledAmount_01a17754-bb9f-7159-867e-e879e790597d" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentForContingentConsiderationLiabilityInvestingActivities_01a17996-4581-7374-ada1-e10dc5edd279" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PaymentForContingentConsiderationLiabilityInvestingActivities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019fcd6b-89e2-7894-8293-68bb7cbcfb35" xlink:to="loc_us-gaap_PaymentForContingentConsiderationLiabilityInvestingActivities_01a17996-4581-7374-ada1-e10dc5edd279" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_voyg_BusinessCombinationContingentConsiderationEquityInterestShareIssuedValue_01a17754-bb9f-7134-9391-1653c05692f3" xlink:href="voyg-20260930.xsd#voyg_BusinessCombinationContingentConsiderationEquityInterestShareIssuedValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019fcd6b-89e2-7894-8293-68bb7cbcfb35" xlink:to="loc_voyg_BusinessCombinationContingentConsiderationEquityInterestShareIssuedValue_01a17754-bb9f-7134-9391-1653c05692f3" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueHigh_01a17998-f79b-77ce-ba74-2af51e9700a7" 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_019fcd6b-89e2-7894-8293-68bb7cbcfb35" xlink:to="loc_us-gaap_BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueHigh_01a17998-f79b-77ce-ba74-2af51e9700a7" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationAcquisitionRelatedCosts_01a05c30-6cf4-7ef3-8d0e-bcac519546a9" 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_019fcd6b-89e2-7894-8293-68bb7cbcfb35" xlink:to="loc_us-gaap_BusinessCombinationAcquisitionRelatedCosts_01a05c30-6cf4-7ef3-8d0e-bcac519546a9" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProvisionForLossOnContracts_01a13f6e-b14b-7821-a61a-cad6dc8f03b6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ProvisionForLossOnContracts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019fcd6b-89e2-7894-8293-68bb7cbcfb35" xlink:to="loc_us-gaap_ProvisionForLossOnContracts_01a13f6e-b14b-7821-a61a-cad6dc8f03b6" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_voyg_BusinessCombinationProFormaInformationDepreciationAndAmortizationAdjustments_01a10b4c-19d1-7697-a348-423cfb879129" xlink:href="voyg-20260930.xsd#voyg_BusinessCombinationProFormaInformationDepreciationAndAmortizationAdjustments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019fcd6b-89e2-7894-8293-68bb7cbcfb35" xlink:to="loc_voyg_BusinessCombinationProFormaInformationDepreciationAndAmortizationAdjustments_01a10b4c-19d1-7697-a348-423cfb879129" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_voyg_BusinessCombinationWorkingCapitalAdjustment_019fcd6b-89e2-780e-9fb1-b6cdb62d188b" xlink:href="voyg-20260930.xsd#voyg_BusinessCombinationWorkingCapitalAdjustment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019fcd6b-89e2-7894-8293-68bb7cbcfb35" xlink:to="loc_voyg_BusinessCombinationWorkingCapitalAdjustment_019fcd6b-89e2-780e-9fb1-b6cdb62d188b" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_voyg_BusinessCombinationPaymentOfWorkingCapitalAdjustment_019fcd6b-89e2-73b1-aa82-d2b7c33b5a1e" xlink:href="voyg-20260930.xsd#voyg_BusinessCombinationPaymentOfWorkingCapitalAdjustment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019fcd6b-89e2-7894-8293-68bb7cbcfb35" xlink:to="loc_voyg_BusinessCombinationPaymentOfWorkingCapitalAdjustment_019fcd6b-89e2-73b1-aa82-d2b7c33b5a1e" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationConsiderationTransferredLiabilitiesIncurred_019fcd6b-89e2-7d6b-9fa8-cb0023a99f79" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessCombinationConsiderationTransferredLiabilitiesIncurred"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019fcd6b-89e2-7894-8293-68bb7cbcfb35" xlink:to="loc_us-gaap_BusinessCombinationConsiderationTransferredLiabilitiesIncurred_019fcd6b-89e2-7d6b-9fa8-cb0023a99f79" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment_019fcd6b-89e2-7f70-b726-b093b2d8c3fd" 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_BusinessAcquisitionLineItems_019fcd6b-89e2-7894-8293-68bb7cbcfb35" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment_019fcd6b-89e2-7f70-b726-b093b2d8c3fd" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill_019fcd6b-89e2-760a-8074-6d21164abbd8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019fcd6b-89e2-7894-8293-68bb7cbcfb35" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill_019fcd6b-89e2-760a-8074-6d21164abbd8" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Goodwill_019fcd6b-89e2-727a-b3c7-48153a5131ff" 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_019fcd6b-89e2-7894-8293-68bb7cbcfb35" xlink:to="loc_us-gaap_Goodwill_019fcd6b-89e2-727a-b3c7-48153a5131ff" xlink:type="arc" order="17"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities_019fcd6b-89e2-7a87-a019-4cec76f03be9" 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_BusinessAcquisitionLineItems_019fcd6b-89e2-7894-8293-68bb7cbcfb35" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities_019fcd6b-89e2-7a87-a019-4cec76f03be9" xlink:type="arc" order="18"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetUsefulLife_019fcd6b-89e2-7bf1-b9ef-eb43b9ca9780" 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_019fcd6b-89e2-7894-8293-68bb7cbcfb35" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetUsefulLife_019fcd6b-89e2-7bf1-b9ef-eb43b9ca9780" xlink:type="arc" order="19"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsRemainingAmortizationPeriod1_019fcd6b-89e2-748f-847d-8493226b4198" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FiniteLivedIntangibleAssetsRemainingAmortizationPeriod1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019fcd6b-89e2-7894-8293-68bb7cbcfb35" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsRemainingAmortizationPeriod1_019fcd6b-89e2-748f-847d-8493226b4198" xlink:type="arc" order="20"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://voyager.com/role/ACQUISITIONSScheduleofNetSalesandNetIncomeLossfromtheCompaniesAcquiredDetails" xlink:type="simple" xlink:href="voyg-20260930.xsd#ACQUISITIONSScheduleofNetSalesandNetIncomeLossfromtheCompaniesAcquiredDetails"/>
  <link:definitionLink xlink:role="http://voyager.com/role/ACQUISITIONSScheduleofNetSalesandNetIncomeLossfromtheCompaniesAcquiredDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionLineItems_019fcd6b-89e2-7c3d-8429-5899b98b38be" 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_019fcd6b-89e2-76da-aa0c-6c1c3a00a068" 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_019fcd6b-89e2-7c3d-8429-5899b98b38be" xlink:to="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_019fcd6b-89e2-76da-aa0c-6c1c3a00a068" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_019fcd6b-89e2-723e-83eb-4b2b1da06cf4" 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_019fcd6b-89e2-76da-aa0c-6c1c3a00a068" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_019fcd6b-89e2-723e-83eb-4b2b1da06cf4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019fcd6b-89e2-723e-83eb-4b2b1da06cf4_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_019fcd6b-89e2-723e-83eb-4b2b1da06cf4" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019fcd6b-89e2-723e-83eb-4b2b1da06cf4_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019fcd6b-89e2-72ac-be82-3f80ec79479e" 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_019fcd6b-89e2-723e-83eb-4b2b1da06cf4" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019fcd6b-89e2-72ac-be82-3f80ec79479e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_voyg_AstroboticTechnologyIncMember_01a05c2a-e001-7232-aa90-d49198a75648" xlink:href="voyg-20260930.xsd#voyg_AstroboticTechnologyIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019fcd6b-89e2-72ac-be82-3f80ec79479e" xlink:to="loc_voyg_AstroboticTechnologyIncMember_01a05c2a-e001-7232-aa90-d49198a75648" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationProFormaInformationRevenueOfAcquireeSinceAcquisitionDateActual_019fcd6b-89e2-74f1-8965-b57d934b8f7b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessCombinationProFormaInformationRevenueOfAcquireeSinceAcquisitionDateActual"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019fcd6b-89e2-7c3d-8429-5899b98b38be" xlink:to="loc_us-gaap_BusinessCombinationProFormaInformationRevenueOfAcquireeSinceAcquisitionDateActual_019fcd6b-89e2-74f1-8965-b57d934b8f7b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationProFormaInformationEarningsOrLossOfAcquireeSinceAcquisitionDateActual_019fcd6b-89e2-7bab-9ec8-4cee2a5fec07" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessCombinationProFormaInformationEarningsOrLossOfAcquireeSinceAcquisitionDateActual"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019fcd6b-89e2-7c3d-8429-5899b98b38be" xlink:to="loc_us-gaap_BusinessCombinationProFormaInformationEarningsOrLossOfAcquireeSinceAcquisitionDateActual_019fcd6b-89e2-7bab-9ec8-4cee2a5fec07" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://voyager.com/role/ACQUISITIONSScheduleofUnauditedProFormaInformationDetails" xlink:type="simple" xlink:href="voyg-20260930.xsd#ACQUISITIONSScheduleofUnauditedProFormaInformationDetails"/>
  <link:definitionLink xlink:role="http://voyager.com/role/ACQUISITIONSScheduleofUnauditedProFormaInformationDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionProFormaInformationNonrecurringAdjustmentLineItems_01a05c2c-8689-71dd-b50d-0db332a27d35" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessAcquisitionProFormaInformationNonrecurringAdjustmentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionProFormaInformationNonrecurringAdjustmentsTable_01a05c2c-8689-774f-a94f-57e642c13f87" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessAcquisitionProFormaInformationNonrecurringAdjustmentsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_BusinessAcquisitionProFormaInformationNonrecurringAdjustmentLineItems_01a05c2c-8689-71dd-b50d-0db332a27d35" xlink:to="loc_us-gaap_BusinessAcquisitionProFormaInformationNonrecurringAdjustmentsTable_01a05c2c-8689-774f-a94f-57e642c13f87" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_01a05c2c-8689-7f63-ac37-3a2c4bacb0c5" 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_BusinessAcquisitionProFormaInformationNonrecurringAdjustmentsTable_01a05c2c-8689-774f-a94f-57e642c13f87" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_01a05c2c-8689-7f63-ac37-3a2c4bacb0c5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_01a05c2c-8689-7f63-ac37-3a2c4bacb0c5_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_01a05c2c-8689-7f63-ac37-3a2c4bacb0c5" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_01a05c2c-8689-7f63-ac37-3a2c4bacb0c5_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_01a05c2c-8689-7a4b-bde4-c63ab008faad" 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_01a05c2c-8689-7f63-ac37-3a2c4bacb0c5" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_01a05c2c-8689-7a4b-bde4-c63ab008faad" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_voyg_AstroboticTechnologyIncMember_01a05c2c-8689-762b-9575-ef9ae515b697" xlink:href="voyg-20260930.xsd#voyg_AstroboticTechnologyIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_01a05c2c-8689-7a4b-bde4-c63ab008faad" xlink:to="loc_voyg_AstroboticTechnologyIncMember_01a05c2c-8689-762b-9575-ef9ae515b697" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_01a13f5a-0c11-7159-b7b6-8319e1554592" 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_BusinessAcquisitionProFormaInformationNonrecurringAdjustmentsTable_01a05c2c-8689-774f-a94f-57e642c13f87" xlink:to="loc_dei_LegalEntityAxis_01a13f5a-0c11-7159-b7b6-8319e1554592" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_01a13f5a-0c11-7159-b7b6-8319e1554592_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_01a13f5a-0c11-7159-b7b6-8319e1554592" xlink:to="loc_dei_EntityDomain_01a13f5a-0c11-7159-b7b6-8319e1554592_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_01a13f5a-0c11-76c0-91a5-ba3f62b0a274" 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_01a13f5a-0c11-7159-b7b6-8319e1554592" xlink:to="loc_dei_EntityDomain_01a13f5a-0c11-76c0-91a5-ba3f62b0a274" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_voyg_VoyagerTechnologiesIncMember_01a13f5b-b95f-7d53-acf8-5703033621bc" xlink:href="voyg-20260930.xsd#voyg_VoyagerTechnologiesIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_01a13f5a-0c11-76c0-91a5-ba3f62b0a274" xlink:to="loc_voyg_VoyagerTechnologiesIncMember_01a13f5b-b95f-7d53-acf8-5703033621bc" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionsProFormaRevenue_01a05c2c-8689-74c7-bb7e-84044a6e363c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessAcquisitionsProFormaRevenue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionProFormaInformationNonrecurringAdjustmentLineItems_01a05c2c-8689-71dd-b50d-0db332a27d35" xlink:to="loc_us-gaap_BusinessAcquisitionsProFormaRevenue_01a05c2c-8689-74c7-bb7e-84044a6e363c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionsProFormaNetIncomeLoss_01a05c2c-8689-7ad3-b3f9-8abc739e6aca" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessAcquisitionsProFormaNetIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionProFormaInformationNonrecurringAdjustmentLineItems_01a05c2c-8689-71dd-b50d-0db332a27d35" xlink:to="loc_us-gaap_BusinessAcquisitionsProFormaNetIncomeLoss_01a05c2c-8689-7ad3-b3f9-8abc739e6aca" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://voyager.com/role/ACQUISITIONSScheduleofRecognizedAssetAcquiredandLiabilityAssumedDetails" xlink:type="simple" xlink:href="voyg-20260930.xsd#ACQUISITIONSScheduleofRecognizedAssetAcquiredandLiabilityAssumedDetails"/>
  <link:definitionLink xlink:role="http://voyager.com/role/ACQUISITIONSScheduleofRecognizedAssetAcquiredandLiabilityAssumedDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionLineItems_019fcd6b-89e2-74a3-8dce-b20b6d547a9f" 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_019fcd6b-89e2-76c2-8115-9c32be70f4c1" 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_019fcd6b-89e2-74a3-8dce-b20b6d547a9f" xlink:to="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_019fcd6b-89e2-76c2-8115-9c32be70f4c1" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_019fcd6b-89e2-76ce-a913-c3101d9d9b73" 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_019fcd6b-89e2-76c2-8115-9c32be70f4c1" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_019fcd6b-89e2-76ce-a913-c3101d9d9b73" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019fcd6b-89e2-76ce-a913-c3101d9d9b73_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_019fcd6b-89e2-76ce-a913-c3101d9d9b73" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019fcd6b-89e2-76ce-a913-c3101d9d9b73_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019fcd6b-89e2-70d4-b0a8-f3a29d75c5c7" 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_019fcd6b-89e2-76ce-a913-c3101d9d9b73" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019fcd6b-89e2-70d4-b0a8-f3a29d75c5c7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_voyg_AstroboticTechnologyIncMember_01a041ef-48af-790a-8984-93969eef82b6" xlink:href="voyg-20260930.xsd#voyg_AstroboticTechnologyIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019fcd6b-89e2-70d4-b0a8-f3a29d75c5c7" xlink:to="loc_voyg_AstroboticTechnologyIncMember_01a041ef-48af-790a-8984-93969eef82b6" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_voyg_ExoTerraResourceLLCMember_019fcd6b-89e2-7342-b476-74a5c8e318da" xlink:href="voyg-20260930.xsd#voyg_ExoTerraResourceLLCMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019fcd6b-89e2-70d4-b0a8-f3a29d75c5c7" xlink:to="loc_voyg_ExoTerraResourceLLCMember_019fcd6b-89e2-7342-b476-74a5c8e318da" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_voyg_EstesEnergeticsMember_019fcd6b-89e2-705b-9a52-585c733a3890" xlink:href="voyg-20260930.xsd#voyg_EstesEnergeticsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019fcd6b-89e2-70d4-b0a8-f3a29d75c5c7" xlink:to="loc_voyg_EstesEnergeticsMember_019fcd6b-89e2-705b-9a52-585c733a3890" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_019fcd6b-89e2-75c4-bf46-f8fb8180bde2" 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_019fcd6b-89e2-76c2-8115-9c32be70f4c1" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_019fcd6b-89e2-75c4-bf46-f8fb8180bde2" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019fcd6b-89e2-75c4-bf46-f8fb8180bde2_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_019fcd6b-89e2-75c4-bf46-f8fb8180bde2" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019fcd6b-89e2-75c4-bf46-f8fb8180bde2_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019fcd6b-89e2-766f-b60e-783e08a69b08" 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_019fcd6b-89e2-75c4-bf46-f8fb8180bde2" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019fcd6b-89e2-766f-b60e-783e08a69b08" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TradeNamesMember_019fcd6b-89e2-7d34-a4fc-cf29a643f098" 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_019fcd6b-89e2-766f-b60e-783e08a69b08" xlink:to="loc_us-gaap_TradeNamesMember_019fcd6b-89e2-7d34-a4fc-cf29a643f098" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CustomerRelationshipsMember_019fcd6b-89e2-7493-97c7-91bddb9ea400" 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_019fcd6b-89e2-766f-b60e-783e08a69b08" xlink:to="loc_us-gaap_CustomerRelationshipsMember_019fcd6b-89e2-7493-97c7-91bddb9ea400" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DevelopedTechnologyRightsMember_019fcd6b-89e2-74f9-b1e1-cdde7fa2a1e1" 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_019fcd6b-89e2-766f-b60e-783e08a69b08" xlink:to="loc_us-gaap_DevelopedTechnologyRightsMember_019fcd6b-89e2-74f9-b1e1-cdde7fa2a1e1" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssetsAbstract_019fcd6b-89e2-7166-a822-fbe7f206834f" 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_019fcd6b-89e2-74a3-8dce-b20b6d547a9f" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssetsAbstract_019fcd6b-89e2-7166-a822-fbe7f206834f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents_019fcd6b-89e2-7d2f-88bd-7f6267d4bbdb" 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_019fcd6b-89e2-7166-a822-fbe7f206834f" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents_019fcd6b-89e2-7d2f-88bd-7f6267d4bbdb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables_019fcd6b-89e2-7eb4-9b07-03b70b9cb487" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssetsAbstract_019fcd6b-89e2-7166-a822-fbe7f206834f" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables_019fcd6b-89e2-7eb4-9b07-03b70b9cb487" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_voyg_BusinessCombinationRecognizedAssetAcquiredContractWithCustomerAssets_019fcd6b-89e2-75b0-84e4-c1030005bea2" xlink:href="voyg-20260930.xsd#voyg_BusinessCombinationRecognizedAssetAcquiredContractWithCustomerAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssetsAbstract_019fcd6b-89e2-7166-a822-fbe7f206834f" xlink:to="loc_voyg_BusinessCombinationRecognizedAssetAcquiredContractWithCustomerAssets_019fcd6b-89e2-75b0-84e4-c1030005bea2" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_voyg_BusinessCombinationRecognizedAssetAcquiredAdvancedPaymentsCurrent_01a13f76-d6e0-73f1-bf3a-e6459fdcf412" xlink:href="voyg-20260930.xsd#voyg_BusinessCombinationRecognizedAssetAcquiredAdvancedPaymentsCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssetsAbstract_019fcd6b-89e2-7166-a822-fbe7f206834f" xlink:to="loc_voyg_BusinessCombinationRecognizedAssetAcquiredAdvancedPaymentsCurrent_01a13f76-d6e0-73f1-bf3a-e6459fdcf412" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInventory_019fcd6b-89e2-7673-b6d7-5a198e1c9a67" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInventory"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssetsAbstract_019fcd6b-89e2-7166-a822-fbe7f206834f" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInventory_019fcd6b-89e2-7673-b6d7-5a198e1c9a67" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsPrepaidExpenseAndOtherAssets_019fcd6b-89e2-720e-9cbb-3d2535a424bc" 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_019fcd6b-89e2-7166-a822-fbe7f206834f" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsPrepaidExpenseAndOtherAssets_019fcd6b-89e2-720e-9cbb-3d2535a424bc" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment_019fcd6b-89e2-7d77-b392-17de9c4e7c62" 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_019fcd6b-89e2-7166-a822-fbe7f206834f" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment_019fcd6b-89e2-7d77-b392-17de9c4e7c62" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_voyg_BusinessCombinationRecognizedAssetAcquiredOperatingLeaseRightOfUseAssets_019fcd6b-89e2-7d91-bc8e-3c104e295c85" xlink:href="voyg-20260930.xsd#voyg_BusinessCombinationRecognizedAssetAcquiredOperatingLeaseRightOfUseAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssetsAbstract_019fcd6b-89e2-7166-a822-fbe7f206834f" xlink:to="loc_voyg_BusinessCombinationRecognizedAssetAcquiredOperatingLeaseRightOfUseAssets_019fcd6b-89e2-7d91-bc8e-3c104e295c85" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles_019fcd6b-89e2-760b-b812-e2e937f5af7c" 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_019fcd6b-89e2-7166-a822-fbe7f206834f" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles_019fcd6b-89e2-760b-b812-e2e937f5af7c" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Goodwill_019fcd6b-89e2-71b9-b55e-dffbe2f4b4cd" 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_019fcd6b-89e2-7166-a822-fbe7f206834f" xlink:to="loc_us-gaap_Goodwill_019fcd6b-89e2-71b9-b55e-dffbe2f4b4cd" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherNoncurrentAssets_019fcd6b-89e2-7395-bfb8-e52f79ceef38" 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_019fcd6b-89e2-7166-a822-fbe7f206834f" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherNoncurrentAssets_019fcd6b-89e2-7395-bfb8-e52f79ceef38" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_voyg_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssetsAcquiredIncludingGoodwill_019fcd6b-89e2-7855-b90a-108eeb9d005d" xlink:href="voyg-20260930.xsd#voyg_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssetsAcquiredIncludingGoodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssetsAbstract_019fcd6b-89e2-7166-a822-fbe7f206834f" xlink:to="loc_voyg_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssetsAcquiredIncludingGoodwill_019fcd6b-89e2-7855-b90a-108eeb9d005d" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilitiesAbstract_019fcd6b-89e2-727a-88ff-061e624185fe" 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_019fcd6b-89e2-74a3-8dce-b20b6d547a9f" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilitiesAbstract_019fcd6b-89e2-727a-88ff-061e624185fe" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesAccountsPayable_019fcd6b-89e2-7fa0-a865-73445f8b5ba4" 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_019fcd6b-89e2-727a-88ff-061e624185fe" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesAccountsPayable_019fcd6b-89e2-7fa0-a865-73445f8b5ba4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_voyg_BusinessCombinationRecognizedAssetAcquiredToLiabilityAssumedContractWithCustomerLiabilityCurrent_019fcd6b-89e2-7524-8689-2406c28437f5" xlink:href="voyg-20260930.xsd#voyg_BusinessCombinationRecognizedAssetAcquiredToLiabilityAssumedContractWithCustomerLiabilityCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilitiesAbstract_019fcd6b-89e2-727a-88ff-061e624185fe" xlink:to="loc_voyg_BusinessCombinationRecognizedAssetAcquiredToLiabilityAssumedContractWithCustomerLiabilityCurrent_019fcd6b-89e2-7524-8689-2406c28437f5" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_voyg_BusinessCombinationRecognizedLiabilityAssumedOperatingLeaseLiabilitiesCurrent_019fcd6b-89e2-7e87-888c-128d537f1743" xlink:href="voyg-20260930.xsd#voyg_BusinessCombinationRecognizedLiabilityAssumedOperatingLeaseLiabilitiesCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilitiesAbstract_019fcd6b-89e2-727a-88ff-061e624185fe" xlink:to="loc_voyg_BusinessCombinationRecognizedLiabilityAssumedOperatingLeaseLiabilitiesCurrent_019fcd6b-89e2-7e87-888c-128d537f1743" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_voyg_BusinessCombinationRecognizedLiabilityAssumedAccruedExpensesAndOtherLiabilitiesCurrent_019fcd6b-89e2-7eed-b112-c83c4f58f0bf" xlink:href="voyg-20260930.xsd#voyg_BusinessCombinationRecognizedLiabilityAssumedAccruedExpensesAndOtherLiabilitiesCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilitiesAbstract_019fcd6b-89e2-727a-88ff-061e624185fe" xlink:to="loc_voyg_BusinessCombinationRecognizedLiabilityAssumedAccruedExpensesAndOtherLiabilitiesCurrent_019fcd6b-89e2-7eed-b112-c83c4f58f0bf" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_voyg_BusinessCombinationRecognizedLiabilityAssumedOperatingLeaseLiabilitiesNoncurrent_019fcd6b-89e2-7883-8647-7ed6d6c9d645" xlink:href="voyg-20260930.xsd#voyg_BusinessCombinationRecognizedLiabilityAssumedOperatingLeaseLiabilitiesNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilitiesAbstract_019fcd6b-89e2-727a-88ff-061e624185fe" xlink:to="loc_voyg_BusinessCombinationRecognizedLiabilityAssumedOperatingLeaseLiabilitiesNoncurrent_019fcd6b-89e2-7883-8647-7ed6d6c9d645" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_voyg_BusinessCombinationRecognizedAssetAcquiredToLiabilityAssumedContractWithCustomerLiabilityNoncurrent_01a10b02-6c85-7c51-842b-17c5f9a704ac" xlink:href="voyg-20260930.xsd#voyg_BusinessCombinationRecognizedAssetAcquiredToLiabilityAssumedContractWithCustomerLiabilityNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilitiesAbstract_019fcd6b-89e2-727a-88ff-061e624185fe" xlink:to="loc_voyg_BusinessCombinationRecognizedAssetAcquiredToLiabilityAssumedContractWithCustomerLiabilityNoncurrent_01a10b02-6c85-7c51-842b-17c5f9a704ac" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxLiabilities_019fcd6b-89e2-7af7-8a05-3289960b4f68" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilitiesAbstract_019fcd6b-89e2-727a-88ff-061e624185fe" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxLiabilities_019fcd6b-89e2-7af7-8a05-3289960b4f68" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesOther_019fcd6b-89e2-7d82-8858-0870dae1524e" 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_019fcd6b-89e2-727a-88ff-061e624185fe" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesOther_019fcd6b-89e2-7d82-8858-0870dae1524e" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities_019fcd6b-89e2-7e4a-9b28-a3f3f63fa7b1" 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_019fcd6b-89e2-727a-88ff-061e624185fe" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities_019fcd6b-89e2-7e4a-9b28-a3f3f63fa7b1" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet_019fcd6b-89e2-797f-98af-c301baa7300c" 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_019fcd6b-89e2-74a3-8dce-b20b6d547a9f" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet_019fcd6b-89e2-797f-98af-c301baa7300c" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://voyager.com/role/ACQUISITIONSScheduleofIntangibleAssetAcquiredDetails" xlink:type="simple" xlink:href="voyg-20260930.xsd#ACQUISITIONSScheduleofIntangibleAssetAcquiredDetails"/>
  <link:definitionLink xlink:role="http://voyager.com/role/ACQUISITIONSScheduleofIntangibleAssetAcquiredDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionLineItems_019fcd6b-89e2-7155-bbfa-7dc4ff1ffdd3" 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_019fcd6b-89e2-7cd2-8ebf-4bc146c96d53" 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_019fcd6b-89e2-7155-bbfa-7dc4ff1ffdd3" xlink:to="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_019fcd6b-89e2-7cd2-8ebf-4bc146c96d53" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_019fcd6b-89e2-72c9-ac55-78d6819dd4be" 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_019fcd6b-89e2-7cd2-8ebf-4bc146c96d53" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_019fcd6b-89e2-72c9-ac55-78d6819dd4be" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019fcd6b-89e2-72c9-ac55-78d6819dd4be_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_019fcd6b-89e2-72c9-ac55-78d6819dd4be" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019fcd6b-89e2-72c9-ac55-78d6819dd4be_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019fcd6b-89e2-7ea2-94f2-ab001605bac7" 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_019fcd6b-89e2-72c9-ac55-78d6819dd4be" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019fcd6b-89e2-7ea2-94f2-ab001605bac7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_voyg_AstroboticTechnologyIncMember_01a041f0-a8c1-78a8-af2f-4b5497854186" xlink:href="voyg-20260930.xsd#voyg_AstroboticTechnologyIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019fcd6b-89e2-7ea2-94f2-ab001605bac7" xlink:to="loc_voyg_AstroboticTechnologyIncMember_01a041f0-a8c1-78a8-af2f-4b5497854186" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_voyg_ExoTerraResourceLLCMember_019fcd6b-89e2-7562-80f6-54ecf99c02a0" xlink:href="voyg-20260930.xsd#voyg_ExoTerraResourceLLCMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019fcd6b-89e2-7ea2-94f2-ab001605bac7" xlink:to="loc_voyg_ExoTerraResourceLLCMember_019fcd6b-89e2-7562-80f6-54ecf99c02a0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_voyg_EstesEnergeticsMember_019fcd6b-89e2-7d3c-86c7-0d8c39e5ef45" xlink:href="voyg-20260930.xsd#voyg_EstesEnergeticsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019fcd6b-89e2-7ea2-94f2-ab001605bac7" xlink:to="loc_voyg_EstesEnergeticsMember_019fcd6b-89e2-7d3c-86c7-0d8c39e5ef45" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_019fcd6b-89e2-745f-9776-47ebd192fa81" 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_019fcd6b-89e2-7cd2-8ebf-4bc146c96d53" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_019fcd6b-89e2-745f-9776-47ebd192fa81" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019fcd6b-89e2-745f-9776-47ebd192fa81_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_019fcd6b-89e2-745f-9776-47ebd192fa81" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019fcd6b-89e2-745f-9776-47ebd192fa81_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019fcd6b-89e2-7a0a-82d1-feab9caf0dc8" 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_019fcd6b-89e2-745f-9776-47ebd192fa81" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019fcd6b-89e2-7a0a-82d1-feab9caf0dc8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CustomerRelationshipsMember_019fcd6b-89e2-7e1a-bead-f1b2181d75cd" 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_019fcd6b-89e2-7a0a-82d1-feab9caf0dc8" xlink:to="loc_us-gaap_CustomerRelationshipsMember_019fcd6b-89e2-7e1a-bead-f1b2181d75cd" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DevelopedTechnologyRightsMember_019fcd6b-89e2-7781-830c-a8510216f7a4" 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_019fcd6b-89e2-7a0a-82d1-feab9caf0dc8" xlink:to="loc_us-gaap_DevelopedTechnologyRightsMember_019fcd6b-89e2-7781-830c-a8510216f7a4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TradeNamesMember_019fcd6b-89e2-73e0-a17d-3ba034ed982b" 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_019fcd6b-89e2-7a0a-82d1-feab9caf0dc8" xlink:to="loc_us-gaap_TradeNamesMember_019fcd6b-89e2-73e0-a17d-3ba034ed982b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_019fcd6b-89e2-7220-aefa-347cb8eac53b" 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_ScheduleOfBusinessAcquisitionsByAcquisitionTable_019fcd6b-89e2-7cd2-8ebf-4bc146c96d53" xlink:to="loc_srt_RangeAxis_019fcd6b-89e2-7220-aefa-347cb8eac53b" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019fcd6b-89e2-7220-aefa-347cb8eac53b_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_019fcd6b-89e2-7220-aefa-347cb8eac53b" xlink:to="loc_srt_RangeMember_019fcd6b-89e2-7220-aefa-347cb8eac53b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019fcd6b-89e2-7260-8eb2-bdfaad8b3e53" 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_019fcd6b-89e2-7220-aefa-347cb8eac53b" xlink:to="loc_srt_RangeMember_019fcd6b-89e2-7260-8eb2-bdfaad8b3e53" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_019fcd6b-89e2-74e8-ad99-0a903213bde3" 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_019fcd6b-89e2-7260-8eb2-bdfaad8b3e53" xlink:to="loc_srt_MinimumMember_019fcd6b-89e2-74e8-ad99-0a903213bde3" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_019fcd6b-89e2-7236-98e5-240c156de75f" 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_019fcd6b-89e2-7260-8eb2-bdfaad8b3e53" xlink:to="loc_srt_MaximumMember_019fcd6b-89e2-7236-98e5-240c156de75f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill_01a10ad7-ce48-7042-80c1-add5949429f3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019fcd6b-89e2-7155-bbfa-7dc4ff1ffdd3" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill_01a10ad7-ce48-7042-80c1-add5949429f3" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife_019fcd6b-89e2-7fee-8d1e-08b9220ff7af" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019fcd6b-89e2-7155-bbfa-7dc4ff1ffdd3" xlink:to="loc_us-gaap_AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife_019fcd6b-89e2-7fee-8d1e-08b9220ff7af" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://voyager.com/role/PROPERTYANDEQUIPMENTNETScheduleofPropertyandEquipmentNetDetails" xlink:type="simple" xlink:href="voyg-20260930.xsd#PROPERTYANDEQUIPMENTNETScheduleofPropertyandEquipmentNetDetails"/>
  <link:definitionLink xlink:role="http://voyager.com/role/PROPERTYANDEQUIPMENTNETScheduleofPropertyandEquipmentNetDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019fcd6b-89e2-7c33-ad4c-8da05ec82fc3" 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_019fcd6b-89e2-75cb-982f-0ec2e96209af" 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_019fcd6b-89e2-7c33-ad4c-8da05ec82fc3" xlink:to="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_019fcd6b-89e2-75cb-982f-0ec2e96209af" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_019fcd6b-89e2-79a8-ac01-04ae95dd3d4f" 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_019fcd6b-89e2-75cb-982f-0ec2e96209af" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_019fcd6b-89e2-79a8-ac01-04ae95dd3d4f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019fcd6b-89e2-79a8-ac01-04ae95dd3d4f_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_019fcd6b-89e2-79a8-ac01-04ae95dd3d4f" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019fcd6b-89e2-79a8-ac01-04ae95dd3d4f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019fcd6b-89e2-7d53-b3ae-7c0d8e5f5753" 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_019fcd6b-89e2-79a8-ac01-04ae95dd3d4f" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019fcd6b-89e2-7d53-b3ae-7c0d8e5f5753" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LandMember_01a10ad4-6726-7c39-bb43-8e175987951e" 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_019fcd6b-89e2-7d53-b3ae-7c0d8e5f5753" xlink:to="loc_us-gaap_LandMember_01a10ad4-6726-7c39-bb43-8e175987951e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MachineryAndEquipmentMember_019fcd6b-89e2-79d6-afc7-2da1784fd3d3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_MachineryAndEquipmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019fcd6b-89e2-7d53-b3ae-7c0d8e5f5753" xlink:to="loc_us-gaap_MachineryAndEquipmentMember_019fcd6b-89e2-79d6-afc7-2da1784fd3d3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_voyg_EquipmentInOrbitMember_019fcd6b-89e2-7592-8913-96316dd2075c" xlink:href="voyg-20260930.xsd#voyg_EquipmentInOrbitMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019fcd6b-89e2-7d53-b3ae-7c0d8e5f5753" xlink:to="loc_voyg_EquipmentInOrbitMember_019fcd6b-89e2-7592-8913-96316dd2075c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BuildingMember_019fcd6b-89e2-7bd4-b1a3-b1ddfaa964e4" 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_019fcd6b-89e2-7d53-b3ae-7c0d8e5f5753" xlink:to="loc_us-gaap_BuildingMember_019fcd6b-89e2-7bd4-b1a3-b1ddfaa964e4" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_voyg_ITRelatedEquipmentMember_019fcd6b-89e2-7117-86cb-588bb1a8f0ee" xlink:href="voyg-20260930.xsd#voyg_ITRelatedEquipmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019fcd6b-89e2-7d53-b3ae-7c0d8e5f5753" xlink:to="loc_voyg_ITRelatedEquipmentMember_019fcd6b-89e2-7117-86cb-588bb1a8f0ee" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LeaseholdImprovementsMember_019fcd6b-89e2-7efb-9b0d-629c68e0e2e0" 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_019fcd6b-89e2-7d53-b3ae-7c0d8e5f5753" xlink:to="loc_us-gaap_LeaseholdImprovementsMember_019fcd6b-89e2-7efb-9b0d-629c68e0e2e0" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConstructionInProgressMember_019fcd6b-89e2-7a3c-80ae-abb40f4a67ba" 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_019fcd6b-89e2-7d53-b3ae-7c0d8e5f5753" xlink:to="loc_us-gaap_ConstructionInProgressMember_019fcd6b-89e2-7a3c-80ae-abb40f4a67ba" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentGross_019fcd6b-89e2-7efe-b1a7-114715f3c1c1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PropertyPlantAndEquipmentGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019fcd6b-89e2-7c33-ad4c-8da05ec82fc3" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentGross_019fcd6b-89e2-7efe-b1a7-114715f3c1c1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_019fcd6b-89e2-7e2e-b4b9-0f6873118ef7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019fcd6b-89e2-7c33-ad4c-8da05ec82fc3" xlink:to="loc_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_019fcd6b-89e2-7e2e-b4b9-0f6873118ef7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentNet_019fcd6b-89e2-7dcf-a6ce-95bc7c2b71b5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PropertyPlantAndEquipmentNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019fcd6b-89e2-7c33-ad4c-8da05ec82fc3" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentNet_019fcd6b-89e2-7dcf-a6ce-95bc7c2b71b5" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://voyager.com/role/LEASESDetails" xlink:type="simple" xlink:href="voyg-20260930.xsd#LEASESDetails"/>
  <link:definitionLink xlink:role="http://voyager.com/role/LEASESDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeLeaseDescriptionLineItems_019fcd6b-89e2-7702-a7e3-1d465f6f452d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LesseeLeaseDescriptionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeLeaseDescriptionTable_019fcd6b-89e2-7142-b6d0-863683312071" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LesseeLeaseDescriptionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_019fcd6b-89e2-7702-a7e3-1d465f6f452d" xlink:to="loc_us-gaap_LesseeLeaseDescriptionTable_019fcd6b-89e2-7142-b6d0-863683312071" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_019fcd6b-89e2-75ca-a1ca-09f33f7dfe45" 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_LesseeLeaseDescriptionTable_019fcd6b-89e2-7142-b6d0-863683312071" xlink:to="loc_srt_RangeAxis_019fcd6b-89e2-75ca-a1ca-09f33f7dfe45" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019fcd6b-89e2-75ca-a1ca-09f33f7dfe45_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_019fcd6b-89e2-75ca-a1ca-09f33f7dfe45" xlink:to="loc_srt_RangeMember_019fcd6b-89e2-75ca-a1ca-09f33f7dfe45_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019fcd6b-89e2-73e4-b593-32990cb07da3" 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_019fcd6b-89e2-75ca-a1ca-09f33f7dfe45" xlink:to="loc_srt_RangeMember_019fcd6b-89e2-73e4-b593-32990cb07da3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_019fcd6b-89e2-7e4c-aee5-780766f6c069" 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_019fcd6b-89e2-73e4-b593-32990cb07da3" xlink:to="loc_srt_MinimumMember_019fcd6b-89e2-7e4c-aee5-780766f6c069" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_019fcd6b-89e2-732f-b940-0c308fe6b9ec" 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_019fcd6b-89e2-73e4-b593-32990cb07da3" xlink:to="loc_srt_MaximumMember_019fcd6b-89e2-732f-b940-0c308fe6b9ec" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_StatementGeographicalAxis_01a041fb-1059-7c7e-9808-9ab09d41c445" 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_LesseeLeaseDescriptionTable_019fcd6b-89e2-7142-b6d0-863683312071" xlink:to="loc_srt_StatementGeographicalAxis_01a041fb-1059-7c7e-9808-9ab09d41c445" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_01a041fb-1059-7c7e-9808-9ab09d41c445_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_01a041fb-1059-7c7e-9808-9ab09d41c445" xlink:to="loc_srt_SegmentGeographicalDomain_01a041fb-1059-7c7e-9808-9ab09d41c445_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_01a041fb-1059-7b67-bde2-fd2863d7ed1a" 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_01a041fb-1059-7c7e-9808-9ab09d41c445" xlink:to="loc_srt_SegmentGeographicalDomain_01a041fb-1059-7b67-bde2-fd2863d7ed1a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_voyg_LongBeachCaliforniaMember_01a041fb-4302-7829-9dbf-cb50955c20e5" xlink:href="voyg-20260930.xsd#voyg_LongBeachCaliforniaMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_01a041fb-1059-7b67-bde2-fd2863d7ed1a" xlink:to="loc_voyg_LongBeachCaliforniaMember_01a041fb-4302-7829-9dbf-cb50955c20e5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseRemainingLeaseTerm_019fcd6b-89e2-7cee-90ae-b2cbe3246909" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LesseeOperatingLeaseRemainingLeaseTerm"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_019fcd6b-89e2-7702-a7e3-1d465f6f452d" xlink:to="loc_us-gaap_LesseeOperatingLeaseRemainingLeaseTerm_019fcd6b-89e2-7cee-90ae-b2cbe3246909" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseRightOfUseAsset_01a15cff-70d6-7adf-aac0-49d88524ef0b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingLeaseRightOfUseAsset"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_019fcd6b-89e2-7702-a7e3-1d465f6f452d" xlink:to="loc_us-gaap_OperatingLeaseRightOfUseAsset_01a15cff-70d6-7adf-aac0-49d88524ef0b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiability_019fcd6b-89e2-7261-b56e-bf2f3c403bf2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingLeaseLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_019fcd6b-89e2-7702-a7e3-1d465f6f452d" xlink:to="loc_us-gaap_OperatingLeaseLiability_019fcd6b-89e2-7261-b56e-bf2f3c403bf2" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://voyager.com/role/DEBT2032ConvertibleNotesDetails" xlink:type="simple" xlink:href="voyg-20260930.xsd#DEBT2032ConvertibleNotesDetails"/>
  <link:definitionLink xlink:role="http://voyager.com/role/DEBT2032ConvertibleNotesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_01a10adc-d302-7f1c-9852-39c7bd91d615" 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_01a10adc-d302-7d91-a018-2ae81a865d5f" 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_01a10adc-d302-7f1c-9852-39c7bd91d615" xlink:to="loc_us-gaap_DebtInstrumentTable_01a10adc-d302-7d91-a018-2ae81a865d5f" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_01a10adc-d302-7b82-a7ad-828a38a476ff" 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_01a10adc-d302-7d91-a018-2ae81a865d5f" xlink:to="loc_us-gaap_DebtInstrumentAxis_01a10adc-d302-7b82-a7ad-828a38a476ff" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_01a10adc-d302-7b82-a7ad-828a38a476ff_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_01a10adc-d302-7b82-a7ad-828a38a476ff" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_01a10adc-d302-7b82-a7ad-828a38a476ff_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_01a10adc-d302-7853-90cc-9aa8e9871cca" 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_01a10adc-d302-7b82-a7ad-828a38a476ff" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_01a10adc-d302-7853-90cc-9aa8e9871cca" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_voyg_A2032ConvertibleSeniorSecuredNotesMember_01a10adc-d302-78f6-8989-8d54f406eaa7" xlink:href="voyg-20260930.xsd#voyg_A2032ConvertibleSeniorSecuredNotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_01a10adc-d302-7853-90cc-9aa8e9871cca" xlink:to="loc_voyg_A2032ConvertibleSeniorSecuredNotesMember_01a10adc-d302-78f6-8989-8d54f406eaa7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_01a10adc-d302-7f2b-9967-74d8d4900d26" 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_01a10adc-d302-7d91-a018-2ae81a865d5f" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_01a10adc-d302-7f2b-9967-74d8d4900d26" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_01a10adc-d302-7f2b-9967-74d8d4900d26_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_01a10adc-d302-7f2b-9967-74d8d4900d26" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_01a10adc-d302-7f2b-9967-74d8d4900d26_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_01a10adc-d302-7269-9d94-61fdb5f5f4b2" 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_01a10adc-d302-7f2b-9967-74d8d4900d26" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_01a10adc-d302-7269-9d94-61fdb5f5f4b2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConvertibleDebtMember_01a10adc-d302-7d75-b9dc-6a6a7698fae1" 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_01a10adc-d302-7269-9d94-61fdb5f5f4b2" xlink:to="loc_us-gaap_ConvertibleDebtMember_01a10adc-d302-7d75-b9dc-6a6a7698fae1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementClassOfStockAxis_01a10b0d-011f-7865-a8f5-d924b5eed7b7" 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_DebtInstrumentTable_01a10adc-d302-7d91-a018-2ae81a865d5f" xlink:to="loc_us-gaap_StatementClassOfStockAxis_01a10b0d-011f-7865-a8f5-d924b5eed7b7" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_01a10b0d-011f-7865-a8f5-d924b5eed7b7_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_01a10b0d-011f-7865-a8f5-d924b5eed7b7" xlink:to="loc_us-gaap_ClassOfStockDomain_01a10b0d-011f-7865-a8f5-d924b5eed7b7_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_01a10b0d-011f-74b0-ae8e-355f583eeea0" 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_01a10b0d-011f-7865-a8f5-d924b5eed7b7" xlink:to="loc_us-gaap_ClassOfStockDomain_01a10b0d-011f-74b0-ae8e-355f583eeea0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonClassAMember_01a10b0d-011f-7d27-97f6-6fb129ea7e70" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonClassAMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_01a10b0d-011f-74b0-ae8e-355f583eeea0" xlink:to="loc_us-gaap_CommonClassAMember_01a10b0d-011f-7d27-97f6-6fb129ea7e70" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_01a10b0f-0f30-7241-824b-d945d2f623ee" 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_DebtInstrumentTable_01a10adc-d302-7d91-a018-2ae81a865d5f" xlink:to="loc_srt_RangeAxis_01a10b0f-0f30-7241-824b-d945d2f623ee" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_01a10b0f-0f30-7241-824b-d945d2f623ee_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_01a10b0f-0f30-7241-824b-d945d2f623ee" xlink:to="loc_srt_RangeMember_01a10b0f-0f30-7241-824b-d945d2f623ee_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_01a10b0f-0f30-705d-8e21-48cb538ce8f1" 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_01a10b0f-0f30-7241-824b-d945d2f623ee" xlink:to="loc_srt_RangeMember_01a10b0f-0f30-705d-8e21-48cb538ce8f1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_01a10b0f-0f30-7c34-848d-b65a5e86144f" 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_01a10b0f-0f30-705d-8e21-48cb538ce8f1" xlink:to="loc_srt_MaximumMember_01a10b0f-0f30-7c34-848d-b65a5e86144f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_01a10b0f-0f30-7868-ad4e-3d54fa698423" 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_01a10b0f-0f30-705d-8e21-48cb538ce8f1" xlink:to="loc_srt_MinimumMember_01a10b0f-0f30-7868-ad4e-3d54fa698423" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentFaceAmount_01a10adc-d302-72b9-a28d-b640c4a5cc04" 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_01a10adc-d302-7f1c-9852-39c7bd91d615" xlink:to="loc_us-gaap_DebtInstrumentFaceAmount_01a10adc-d302-72b9-a28d-b640c4a5cc04" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_voyg_DebtInstrumentFaceAmountOptionToCoverOverallotments_01a10adc-d302-721f-bcf1-089ce5fdff25" xlink:href="voyg-20260930.xsd#voyg_DebtInstrumentFaceAmountOptionToCoverOverallotments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_01a10adc-d302-7f1c-9852-39c7bd91d615" xlink:to="loc_voyg_DebtInstrumentFaceAmountOptionToCoverOverallotments_01a10adc-d302-721f-bcf1-089ce5fdff25" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_voyg_DebtInstrumentFaceAmountWithOptionToCoverOverallotments_01a15cef-503c-70a2-9162-0748853b6ba8" xlink:href="voyg-20260930.xsd#voyg_DebtInstrumentFaceAmountWithOptionToCoverOverallotments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_01a10adc-d302-7f1c-9852-39c7bd91d615" xlink:to="loc_voyg_DebtInstrumentFaceAmountWithOptionToCoverOverallotments_01a15cef-503c-70a2-9162-0748853b6ba8" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentConvertibleConversionRatio1_01a10b0c-d59d-7103-a9ef-a58c279ec74f" 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_01a10adc-d302-7f1c-9852-39c7bd91d615" xlink:to="loc_us-gaap_DebtInstrumentConvertibleConversionRatio1_01a10b0c-d59d-7103-a9ef-a58c279ec74f" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentConvertibleConversionPrice1_01a10b0c-d59d-7b05-94e9-5706c2421537" 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_01a10adc-d302-7f1c-9852-39c7bd91d615" xlink:to="loc_us-gaap_DebtInstrumentConvertibleConversionPrice1_01a10b0c-d59d-7b05-94e9-5706c2421537" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockCapitalSharesReservedForFutureIssuance_01a10b0c-d59d-74f3-bbc2-fb5a180bc473" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonStockCapitalSharesReservedForFutureIssuance"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_01a10adc-d302-7f1c-9852-39c7bd91d615" xlink:to="loc_us-gaap_CommonStockCapitalSharesReservedForFutureIssuance_01a10b0c-d59d-74f3-bbc2-fb5a180bc473" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtConversionConvertedInstrumentSharesIssued1_01a10fce-661d-73fc-bb68-6a99d67a4ff4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtConversionConvertedInstrumentSharesIssued1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_01a10adc-d302-7f1c-9852-39c7bd91d615" xlink:to="loc_us-gaap_DebtConversionConvertedInstrumentSharesIssued1_01a10fce-661d-73fc-bb68-6a99d67a4ff4" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentConvertibleThresholdPercentageOfStockPriceTrigger_01a10b0f-0f30-7bd5-b781-6af09a4953ce" 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_01a10adc-d302-7f1c-9852-39c7bd91d615" xlink:to="loc_us-gaap_DebtInstrumentConvertibleThresholdPercentageOfStockPriceTrigger_01a10b0f-0f30-7bd5-b781-6af09a4953ce" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentConvertibleThresholdTradingDays_01a10b0f-0f30-7184-9244-bdbd880bd829" 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_01a10adc-d302-7f1c-9852-39c7bd91d615" xlink:to="loc_us-gaap_DebtInstrumentConvertibleThresholdTradingDays_01a10b0f-0f30-7184-9244-bdbd880bd829" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentConvertibleThresholdConsecutiveTradingDays1_01a10b0f-0f30-7eb8-bb7f-52e6a5e08b71" 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_01a10adc-d302-7f1c-9852-39c7bd91d615" xlink:to="loc_us-gaap_DebtInstrumentConvertibleThresholdConsecutiveTradingDays1_01a10b0f-0f30-7eb8-bb7f-52e6a5e08b71" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredFinanceCostsNet_01a10b0f-5940-7aa2-a3ec-f1414b282fa3" 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_01a10adc-d302-7f1c-9852-39c7bd91d615" xlink:to="loc_us-gaap_DeferredFinanceCostsNet_01a10b0f-5940-7aa2-a3ec-f1414b282fa3" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AmortizationOfFinancingCosts_01a10b0f-5940-7514-9fad-7555cc224f2d" 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_01a10adc-d302-7f1c-9852-39c7bd91d615" xlink:to="loc_us-gaap_AmortizationOfFinancingCosts_01a10b0f-5940-7514-9fad-7555cc224f2d" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConvertibleDebtFairValueDisclosures_01a10b0f-75db-755c-8659-1bab8b588b45" 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_01a10adc-d302-7f1c-9852-39c7bd91d615" xlink:to="loc_us-gaap_ConvertibleDebtFairValueDisclosures_01a10b0f-75db-755c-8659-1bab8b588b45" xlink:type="arc" order="12"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://voyager.com/role/DEBTScheduleofNetCarryingAmountofthe2032ConvertibleNotesDetails" xlink:type="simple" xlink:href="voyg-20260930.xsd#DEBTScheduleofNetCarryingAmountofthe2032ConvertibleNotesDetails"/>
  <link:definitionLink xlink:role="http://voyager.com/role/DEBTScheduleofNetCarryingAmountofthe2032ConvertibleNotesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_01a10ae8-0656-77ba-822c-056703baeb6e" 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_01a10ae8-0656-71db-9120-674b84f53b00" 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_01a10ae8-0656-77ba-822c-056703baeb6e" xlink:to="loc_us-gaap_DebtInstrumentTable_01a10ae8-0656-71db-9120-674b84f53b00" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_01a10ae8-0656-7717-8203-7b7ea1060f84" 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_01a10ae8-0656-71db-9120-674b84f53b00" xlink:to="loc_us-gaap_DebtInstrumentAxis_01a10ae8-0656-7717-8203-7b7ea1060f84" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_01a10ae8-0656-7717-8203-7b7ea1060f84_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_01a10ae8-0656-7717-8203-7b7ea1060f84" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_01a10ae8-0656-7717-8203-7b7ea1060f84_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_01a10ae8-0656-7951-9970-d9ad57f486a8" 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_01a10ae8-0656-7717-8203-7b7ea1060f84" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_01a10ae8-0656-7951-9970-d9ad57f486a8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_voyg_A2032ConvertibleSeniorSecuredNotesMember_01a10ae8-0656-755b-94ca-1b332af371a9" xlink:href="voyg-20260930.xsd#voyg_A2032ConvertibleSeniorSecuredNotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_01a10ae8-0656-7951-9970-d9ad57f486a8" xlink:to="loc_voyg_A2032ConvertibleSeniorSecuredNotesMember_01a10ae8-0656-755b-94ca-1b332af371a9" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_01a10ae8-0656-7644-9d2c-e8d717587819" 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_01a10ae8-0656-71db-9120-674b84f53b00" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_01a10ae8-0656-7644-9d2c-e8d717587819" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_01a10ae8-0656-7644-9d2c-e8d717587819_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_01a10ae8-0656-7644-9d2c-e8d717587819" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_01a10ae8-0656-7644-9d2c-e8d717587819_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_01a10ae8-0656-7255-9b64-34584761c63b" 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_01a10ae8-0656-7644-9d2c-e8d717587819" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_01a10ae8-0656-7255-9b64-34584761c63b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConvertibleDebtMember_01a10ae8-0656-7620-8ec0-b99569097b5e" 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_01a10ae8-0656-7255-9b64-34584761c63b" xlink:to="loc_us-gaap_ConvertibleDebtMember_01a10ae8-0656-7620-8ec0-b99569097b5e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentCarryingAmount_01a10ae8-0656-714c-917d-94ef1b18a2bb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentCarryingAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_01a10ae8-0656-77ba-822c-056703baeb6e" xlink:to="loc_us-gaap_DebtInstrumentCarryingAmount_01a10ae8-0656-714c-917d-94ef1b18a2bb" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnamortizedDebtIssuanceExpense_01a10ae8-0656-7f9c-b994-21c4a3f2d020" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_UnamortizedDebtIssuanceExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_01a10ae8-0656-77ba-822c-056703baeb6e" xlink:to="loc_us-gaap_UnamortizedDebtIssuanceExpense_01a10ae8-0656-7f9c-b994-21c4a3f2d020" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConvertibleLongTermNotesPayable_01a10ae8-0656-79a5-80c8-d86e07d4dde9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ConvertibleLongTermNotesPayable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_01a10ae8-0656-77ba-822c-056703baeb6e" xlink:to="loc_us-gaap_ConvertibleLongTermNotesPayable_01a10ae8-0656-79a5-80c8-d86e07d4dde9" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://voyager.com/role/DEBTCappedCallTransactions2032ConvertibleNotesDetails" xlink:type="simple" xlink:href="voyg-20260930.xsd#DEBTCappedCallTransactions2032ConvertibleNotesDetails"/>
  <link:definitionLink xlink:role="http://voyager.com/role/DEBTCappedCallTransactions2032ConvertibleNotesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_01a10ae9-063e-7d88-90c2-4a6cc951ab3e" 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_01a10ae9-063e-71d1-85db-9f9d734c40d2" 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_01a10ae9-063e-7d88-90c2-4a6cc951ab3e" xlink:to="loc_us-gaap_DebtInstrumentTable_01a10ae9-063e-71d1-85db-9f9d734c40d2" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_01a10ae9-063e-7732-9843-1de5ded4b098" 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_01a10ae9-063e-71d1-85db-9f9d734c40d2" xlink:to="loc_us-gaap_DebtInstrumentAxis_01a10ae9-063e-7732-9843-1de5ded4b098" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_01a10ae9-063e-7732-9843-1de5ded4b098_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_01a10ae9-063e-7732-9843-1de5ded4b098" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_01a10ae9-063e-7732-9843-1de5ded4b098_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_01a10ae9-063e-7caa-868d-856dd2944b27" 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_01a10ae9-063e-7732-9843-1de5ded4b098" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_01a10ae9-063e-7caa-868d-856dd2944b27" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_voyg_A2032ConvertibleSeniorSecuredNotesMember_01a10ae9-063e-74fe-bcbd-f016db8255da" xlink:href="voyg-20260930.xsd#voyg_A2032ConvertibleSeniorSecuredNotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_01a10ae9-063e-7caa-868d-856dd2944b27" xlink:to="loc_voyg_A2032ConvertibleSeniorSecuredNotesMember_01a10ae9-063e-74fe-bcbd-f016db8255da" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementClassOfStockAxis_01a10ae9-063e-7ccf-aa4e-862896664e0e" 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_DebtInstrumentTable_01a10ae9-063e-71d1-85db-9f9d734c40d2" xlink:to="loc_us-gaap_StatementClassOfStockAxis_01a10ae9-063e-7ccf-aa4e-862896664e0e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_01a10ae9-063e-7ccf-aa4e-862896664e0e_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_01a10ae9-063e-7ccf-aa4e-862896664e0e" xlink:to="loc_us-gaap_ClassOfStockDomain_01a10ae9-063e-7ccf-aa4e-862896664e0e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_01a10ae9-063e-72de-8066-e1eb2e218d99" 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_01a10ae9-063e-7ccf-aa4e-862896664e0e" xlink:to="loc_us-gaap_ClassOfStockDomain_01a10ae9-063e-72de-8066-e1eb2e218d99" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonClassAMember_01a10ae9-063e-7b6b-b21f-32ead9c1a917" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonClassAMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_01a10ae9-063e-72de-8066-e1eb2e218d99" xlink:to="loc_us-gaap_CommonClassAMember_01a10ae9-063e-7b6b-b21f-32ead9c1a917" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_voyg_DebtInstrumentCappedCallTransaction_01a10ae9-063e-7055-a723-5f75b15e75a4" xlink:href="voyg-20260930.xsd#voyg_DebtInstrumentCappedCallTransaction"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_01a10ae9-063e-7d88-90c2-4a6cc951ab3e" xlink:to="loc_voyg_DebtInstrumentCappedCallTransaction_01a10ae9-063e-7055-a723-5f75b15e75a4" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_voyg_DebtInstrumentCappedCallTransactionCapPricePerShare_01a10ae9-063e-73e1-b55b-40632cf6a35d" xlink:href="voyg-20260930.xsd#voyg_DebtInstrumentCappedCallTransactionCapPricePerShare"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_01a10ae9-063e-7d88-90c2-4a6cc951ab3e" xlink:to="loc_voyg_DebtInstrumentCappedCallTransactionCapPricePerShare_01a10ae9-063e-73e1-b55b-40632cf6a35d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_voyg_DebtInstrumentCappedCallTransactionCapPricePercentage_01a10ae9-063e-7f52-919f-730f7dfd2a45" xlink:href="voyg-20260930.xsd#voyg_DebtInstrumentCappedCallTransactionCapPricePercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_01a10ae9-063e-7d88-90c2-4a6cc951ab3e" xlink:to="loc_voyg_DebtInstrumentCappedCallTransactionCapPricePercentage_01a10ae9-063e-7f52-919f-730f7dfd2a45" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://voyager.com/role/DEBT2030ConvertibleNotesDetails" xlink:type="simple" xlink:href="voyg-20260930.xsd#DEBT2030ConvertibleNotesDetails"/>
  <link:definitionLink xlink:role="http://voyager.com/role/DEBT2030ConvertibleNotesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_019fcd6b-89e2-769f-8466-2f418b7000a0" 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_019fcd6b-89e2-7737-b122-aa80dd264433" 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_019fcd6b-89e2-769f-8466-2f418b7000a0" xlink:to="loc_us-gaap_DebtInstrumentTable_019fcd6b-89e2-7737-b122-aa80dd264433" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_019fcd6b-89e2-7303-9fcc-1e22e98fdf1e" 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_019fcd6b-89e2-7737-b122-aa80dd264433" xlink:to="loc_us-gaap_DebtInstrumentAxis_019fcd6b-89e2-7303-9fcc-1e22e98fdf1e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019fcd6b-89e2-7303-9fcc-1e22e98fdf1e_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_019fcd6b-89e2-7303-9fcc-1e22e98fdf1e" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019fcd6b-89e2-7303-9fcc-1e22e98fdf1e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019fcd6b-89e2-7d5c-8812-f34b6e29aa2f" 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_019fcd6b-89e2-7303-9fcc-1e22e98fdf1e" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019fcd6b-89e2-7d5c-8812-f34b6e29aa2f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_voyg_A2030ConvertibleSeniorSecuredNotesMember_019fcd6b-89e2-78db-bb65-9aef72e10e20" xlink:href="voyg-20260930.xsd#voyg_A2030ConvertibleSeniorSecuredNotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019fcd6b-89e2-7d5c-8812-f34b6e29aa2f" xlink:to="loc_voyg_A2030ConvertibleSeniorSecuredNotesMember_019fcd6b-89e2-78db-bb65-9aef72e10e20" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_019fcd6b-89e2-7d08-8999-c619fa97dbe4" 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_019fcd6b-89e2-7737-b122-aa80dd264433" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_019fcd6b-89e2-7d08-8999-c619fa97dbe4" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019fcd6b-89e2-7d08-8999-c619fa97dbe4_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_019fcd6b-89e2-7d08-8999-c619fa97dbe4" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019fcd6b-89e2-7d08-8999-c619fa97dbe4_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019fcd6b-89e2-7d69-95fc-837e8ae8b748" 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_019fcd6b-89e2-7d08-8999-c619fa97dbe4" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019fcd6b-89e2-7d69-95fc-837e8ae8b748" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConvertibleDebtMember_019fcd6b-89e2-7de8-bffa-7e0e0ebe7f29" 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_019fcd6b-89e2-7d69-95fc-837e8ae8b748" xlink:to="loc_us-gaap_ConvertibleDebtMember_019fcd6b-89e2-7de8-bffa-7e0e0ebe7f29" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementClassOfStockAxis_019fcd6b-89e2-7e0d-bea0-3330eba87a93" 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_DebtInstrumentTable_019fcd6b-89e2-7737-b122-aa80dd264433" xlink:to="loc_us-gaap_StatementClassOfStockAxis_019fcd6b-89e2-7e0d-bea0-3330eba87a93" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_019fcd6b-89e2-7e0d-bea0-3330eba87a93_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_019fcd6b-89e2-7e0d-bea0-3330eba87a93" xlink:to="loc_us-gaap_ClassOfStockDomain_019fcd6b-89e2-7e0d-bea0-3330eba87a93_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_019fcd6b-89e2-7bc0-8943-8ad83522acd4" 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_019fcd6b-89e2-7e0d-bea0-3330eba87a93" xlink:to="loc_us-gaap_ClassOfStockDomain_019fcd6b-89e2-7bc0-8943-8ad83522acd4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonClassAMember_019fcd6b-89e2-7883-86ff-a73f8f0c0f40" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonClassAMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_019fcd6b-89e2-7bc0-8943-8ad83522acd4" xlink:to="loc_us-gaap_CommonClassAMember_019fcd6b-89e2-7883-86ff-a73f8f0c0f40" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_019fcd6b-89e2-7947-b6b5-f93d5e0f82f4" 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_DebtInstrumentTable_019fcd6b-89e2-7737-b122-aa80dd264433" xlink:to="loc_srt_RangeAxis_019fcd6b-89e2-7947-b6b5-f93d5e0f82f4" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019fcd6b-89e2-7947-b6b5-f93d5e0f82f4_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_019fcd6b-89e2-7947-b6b5-f93d5e0f82f4" xlink:to="loc_srt_RangeMember_019fcd6b-89e2-7947-b6b5-f93d5e0f82f4_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019fcd6b-89e2-711c-8d59-2521ded895be" 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_019fcd6b-89e2-7947-b6b5-f93d5e0f82f4" xlink:to="loc_srt_RangeMember_019fcd6b-89e2-711c-8d59-2521ded895be" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_019fcd6b-89e2-79bf-852f-50a9b620fc99" 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_019fcd6b-89e2-711c-8d59-2521ded895be" xlink:to="loc_srt_MaximumMember_019fcd6b-89e2-79bf-852f-50a9b620fc99" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_019fcd6b-89e2-7389-8df3-9c784793186b" 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_019fcd6b-89e2-711c-8d59-2521ded895be" xlink:to="loc_srt_MinimumMember_019fcd6b-89e2-7389-8df3-9c784793186b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentFaceAmount_019fcd6b-89e2-794f-8a55-15f830670f10" 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_019fcd6b-89e2-769f-8466-2f418b7000a0" xlink:to="loc_us-gaap_DebtInstrumentFaceAmount_019fcd6b-89e2-794f-8a55-15f830670f10" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_voyg_DebtInstrumentFaceAmountOptionToCoverOverallotments_019fcd6b-89e2-7999-a876-5f5c3e4d708d" xlink:href="voyg-20260930.xsd#voyg_DebtInstrumentFaceAmountOptionToCoverOverallotments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019fcd6b-89e2-769f-8466-2f418b7000a0" xlink:to="loc_voyg_DebtInstrumentFaceAmountOptionToCoverOverallotments_019fcd6b-89e2-7999-a876-5f5c3e4d708d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_019fcd6b-89e2-71d7-b21d-357ff889e0d8" 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_019fcd6b-89e2-769f-8466-2f418b7000a0" xlink:to="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_019fcd6b-89e2-71d7-b21d-357ff889e0d8" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromConvertibleDebt_019fcd6b-89e2-7cf2-b374-ada48e0c9a03" 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_019fcd6b-89e2-769f-8466-2f418b7000a0" xlink:to="loc_us-gaap_ProceedsFromConvertibleDebt_019fcd6b-89e2-7cf2-b374-ada48e0c9a03" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentConvertibleConversionPrice1_019fcd6b-89e2-76da-a9a7-81c398ce0583" 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_019fcd6b-89e2-769f-8466-2f418b7000a0" xlink:to="loc_us-gaap_DebtInstrumentConvertibleConversionPrice1_019fcd6b-89e2-76da-a9a7-81c398ce0583" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockCapitalSharesReservedForFutureIssuance_019fcd6b-89e2-708e-9a03-86b2f371bdda" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonStockCapitalSharesReservedForFutureIssuance"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019fcd6b-89e2-769f-8466-2f418b7000a0" xlink:to="loc_us-gaap_CommonStockCapitalSharesReservedForFutureIssuance_019fcd6b-89e2-708e-9a03-86b2f371bdda" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentConvertibleConversionRatio1_019fcd6b-89e2-71e1-9518-b8a05b1d1099" 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_019fcd6b-89e2-769f-8466-2f418b7000a0" xlink:to="loc_us-gaap_DebtInstrumentConvertibleConversionRatio1_019fcd6b-89e2-71e1-9518-b8a05b1d1099" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentConvertibleThresholdPercentageOfStockPriceTrigger_019fcd6b-89e2-770a-9f43-5a9b3bfe92de" 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_019fcd6b-89e2-769f-8466-2f418b7000a0" xlink:to="loc_us-gaap_DebtInstrumentConvertibleThresholdPercentageOfStockPriceTrigger_019fcd6b-89e2-770a-9f43-5a9b3bfe92de" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentConvertibleThresholdTradingDays_019fcd6b-89e2-7d60-a2ce-eedd86a72f5f" 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_019fcd6b-89e2-769f-8466-2f418b7000a0" xlink:to="loc_us-gaap_DebtInstrumentConvertibleThresholdTradingDays_019fcd6b-89e2-7d60-a2ce-eedd86a72f5f" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentConvertibleThresholdConsecutiveTradingDays1_019fcd6b-89e2-745f-b686-c360e3edff96" 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_019fcd6b-89e2-769f-8466-2f418b7000a0" xlink:to="loc_us-gaap_DebtInstrumentConvertibleThresholdConsecutiveTradingDays1_019fcd6b-89e2-745f-b686-c360e3edff96" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredFinanceCostsNet_019fcd6b-89e2-7a20-9c4d-33ca4bea6caa" 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_019fcd6b-89e2-769f-8466-2f418b7000a0" xlink:to="loc_us-gaap_DeferredFinanceCostsNet_019fcd6b-89e2-7a20-9c4d-33ca4bea6caa" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AmortizationOfFinancingCosts_019fcd6b-89e2-7c34-98a6-2d2db17bfb8b" 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_019fcd6b-89e2-769f-8466-2f418b7000a0" xlink:to="loc_us-gaap_AmortizationOfFinancingCosts_019fcd6b-89e2-7c34-98a6-2d2db17bfb8b" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestExpenseDebt_019fcd6b-89e2-70ba-a97f-b12cfe0a2e23" 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_019fcd6b-89e2-769f-8466-2f418b7000a0" xlink:to="loc_us-gaap_InterestExpenseDebt_019fcd6b-89e2-70ba-a97f-b12cfe0a2e23" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentInterestRateDuringPeriod_019fcd6b-89e2-7035-926f-0afa67bd98ce" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentInterestRateDuringPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019fcd6b-89e2-769f-8466-2f418b7000a0" xlink:to="loc_us-gaap_DebtInstrumentInterestRateDuringPeriod_019fcd6b-89e2-7035-926f-0afa67bd98ce" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConvertibleDebtFairValueDisclosures_019fcd6b-89e2-73d8-ab62-a95f2a8ab35a" 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_019fcd6b-89e2-769f-8466-2f418b7000a0" xlink:to="loc_us-gaap_ConvertibleDebtFairValueDisclosures_019fcd6b-89e2-73d8-ab62-a95f2a8ab35a" xlink:type="arc" order="14"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://voyager.com/role/DEBTScheduleofNetCarryingAmountofthe2030ConvertibleNotesDetails" xlink:type="simple" xlink:href="voyg-20260930.xsd#DEBTScheduleofNetCarryingAmountofthe2030ConvertibleNotesDetails"/>
  <link:definitionLink xlink:role="http://voyager.com/role/DEBTScheduleofNetCarryingAmountofthe2030ConvertibleNotesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_019fcd6b-89e2-745f-bcc0-07b09da4ae20" 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_019fcd6b-89e2-79c2-ab3e-8e64945b3c48" 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_019fcd6b-89e2-745f-bcc0-07b09da4ae20" xlink:to="loc_us-gaap_DebtInstrumentTable_019fcd6b-89e2-79c2-ab3e-8e64945b3c48" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_019fcd6b-89e2-77cd-904f-2a885773f612" 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_019fcd6b-89e2-79c2-ab3e-8e64945b3c48" xlink:to="loc_us-gaap_DebtInstrumentAxis_019fcd6b-89e2-77cd-904f-2a885773f612" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019fcd6b-89e2-77cd-904f-2a885773f612_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_019fcd6b-89e2-77cd-904f-2a885773f612" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019fcd6b-89e2-77cd-904f-2a885773f612_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019fcd6b-89e2-7446-8025-d499441377c6" 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_019fcd6b-89e2-77cd-904f-2a885773f612" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019fcd6b-89e2-7446-8025-d499441377c6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_voyg_A2030ConvertibleSeniorSecuredNotesMember_019fcd6b-89e2-79bb-a4b5-6974e030f57d" xlink:href="voyg-20260930.xsd#voyg_A2030ConvertibleSeniorSecuredNotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019fcd6b-89e2-7446-8025-d499441377c6" xlink:to="loc_voyg_A2030ConvertibleSeniorSecuredNotesMember_019fcd6b-89e2-79bb-a4b5-6974e030f57d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_019fcd6b-89e2-759b-a329-db22945a1b13" 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_019fcd6b-89e2-79c2-ab3e-8e64945b3c48" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_019fcd6b-89e2-759b-a329-db22945a1b13" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019fcd6b-89e2-759b-a329-db22945a1b13_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_019fcd6b-89e2-759b-a329-db22945a1b13" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019fcd6b-89e2-759b-a329-db22945a1b13_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019fcd6b-89e2-7991-bae9-d57a411c48e0" 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_019fcd6b-89e2-759b-a329-db22945a1b13" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019fcd6b-89e2-7991-bae9-d57a411c48e0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConvertibleDebtMember_019fcd6b-89e2-7d74-b53e-60d6dcf11a47" 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_019fcd6b-89e2-7991-bae9-d57a411c48e0" xlink:to="loc_us-gaap_ConvertibleDebtMember_019fcd6b-89e2-7d74-b53e-60d6dcf11a47" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentCarryingAmount_019fcd6b-89e2-78f4-8c20-ea5db288b692" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentCarryingAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019fcd6b-89e2-745f-bcc0-07b09da4ae20" xlink:to="loc_us-gaap_DebtInstrumentCarryingAmount_019fcd6b-89e2-78f4-8c20-ea5db288b692" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnamortizedDebtIssuanceExpense_019fcd6b-89e2-731e-bfd5-0df6a7ae6917" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_UnamortizedDebtIssuanceExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019fcd6b-89e2-745f-bcc0-07b09da4ae20" xlink:to="loc_us-gaap_UnamortizedDebtIssuanceExpense_019fcd6b-89e2-731e-bfd5-0df6a7ae6917" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConvertibleLongTermNotesPayable_019fcd6b-89e2-75f6-9a99-bdd01e7a516c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ConvertibleLongTermNotesPayable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019fcd6b-89e2-745f-bcc0-07b09da4ae20" xlink:to="loc_us-gaap_ConvertibleLongTermNotesPayable_019fcd6b-89e2-75f6-9a99-bdd01e7a516c" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://voyager.com/role/DEBTCappedCallsTransactionsDetails" xlink:type="simple" xlink:href="voyg-20260930.xsd#DEBTCappedCallsTransactionsDetails"/>
  <link:definitionLink xlink:role="http://voyager.com/role/DEBTCappedCallsTransactionsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_019fcd6b-89e2-7a18-8ade-f56102ac2de2" 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_019fcd6b-89e2-7fa4-bc38-869206de38bc" 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_019fcd6b-89e2-7a18-8ade-f56102ac2de2" xlink:to="loc_us-gaap_DebtInstrumentTable_019fcd6b-89e2-7fa4-bc38-869206de38bc" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementClassOfStockAxis_019fcd6b-89e2-7088-a4ff-a6f54905c182" 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_DebtInstrumentTable_019fcd6b-89e2-7fa4-bc38-869206de38bc" xlink:to="loc_us-gaap_StatementClassOfStockAxis_019fcd6b-89e2-7088-a4ff-a6f54905c182" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_019fcd6b-89e2-7088-a4ff-a6f54905c182_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_019fcd6b-89e2-7088-a4ff-a6f54905c182" xlink:to="loc_us-gaap_ClassOfStockDomain_019fcd6b-89e2-7088-a4ff-a6f54905c182_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_019fcd6b-89e2-7aee-a715-038f6a704c3b" 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_019fcd6b-89e2-7088-a4ff-a6f54905c182" xlink:to="loc_us-gaap_ClassOfStockDomain_019fcd6b-89e2-7aee-a715-038f6a704c3b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonClassAMember_019fcd6b-89e2-7b97-acd5-8f8b1cabdb6c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonClassAMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_019fcd6b-89e2-7aee-a715-038f6a704c3b" xlink:to="loc_us-gaap_CommonClassAMember_019fcd6b-89e2-7b97-acd5-8f8b1cabdb6c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_voyg_DebtInstrumentCappedCallTransaction_019fcd6b-89e2-72dc-9f9c-49a2a5441e15" xlink:href="voyg-20260930.xsd#voyg_DebtInstrumentCappedCallTransaction"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019fcd6b-89e2-7a18-8ade-f56102ac2de2" xlink:to="loc_voyg_DebtInstrumentCappedCallTransaction_019fcd6b-89e2-72dc-9f9c-49a2a5441e15" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_voyg_DebtInstrumentCappedCallTransactionCapPricePerShare_019fcd6b-89e2-7fc9-ad09-d4de8a250384" xlink:href="voyg-20260930.xsd#voyg_DebtInstrumentCappedCallTransactionCapPricePerShare"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019fcd6b-89e2-7a18-8ade-f56102ac2de2" xlink:to="loc_voyg_DebtInstrumentCappedCallTransactionCapPricePerShare_019fcd6b-89e2-7fc9-ad09-d4de8a250384" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_voyg_DebtInstrumentCappedCallTransactionCapPricePercentage_019fcd6b-89e2-782c-a919-28ab97686136" xlink:href="voyg-20260930.xsd#voyg_DebtInstrumentCappedCallTransactionCapPricePercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019fcd6b-89e2-7a18-8ade-f56102ac2de2" xlink:to="loc_voyg_DebtInstrumentCappedCallTransactionCapPricePercentage_019fcd6b-89e2-782c-a919-28ab97686136" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://voyager.com/role/DEBTPrepaidForwardTransactionDetails" xlink:type="simple" xlink:href="voyg-20260930.xsd#DEBTPrepaidForwardTransactionDetails"/>
  <link:definitionLink xlink:role="http://voyager.com/role/DEBTPrepaidForwardTransactionDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_019fcd6b-89e2-76a6-83af-6df975061d39" 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_019fcd6b-89e2-7412-8de2-d2dba7cdce86" 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_019fcd6b-89e2-76a6-83af-6df975061d39" xlink:to="loc_us-gaap_DebtInstrumentTable_019fcd6b-89e2-7412-8de2-d2dba7cdce86" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ShareRepurchaseProgramAxis_019fcd6b-89e2-734e-ba36-64a089a78508" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ShareRepurchaseProgramAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019fcd6b-89e2-7412-8de2-d2dba7cdce86" xlink:to="loc_srt_ShareRepurchaseProgramAxis_019fcd6b-89e2-734e-ba36-64a089a78508" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ShareRepurchaseProgramDomain_019fcd6b-89e2-734e-ba36-64a089a78508_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ShareRepurchaseProgramDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ShareRepurchaseProgramAxis_019fcd6b-89e2-734e-ba36-64a089a78508" xlink:to="loc_srt_ShareRepurchaseProgramDomain_019fcd6b-89e2-734e-ba36-64a089a78508_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ShareRepurchaseProgramDomain_019fcd6b-89e2-7d89-bd55-3feb93236374" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ShareRepurchaseProgramDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ShareRepurchaseProgramAxis_019fcd6b-89e2-734e-ba36-64a089a78508" xlink:to="loc_srt_ShareRepurchaseProgramDomain_019fcd6b-89e2-7d89-bd55-3feb93236374" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_voyg_PrepaidForwardTransactionMember_019fcd6b-89e2-739b-bcdd-b6de094341f3" xlink:href="voyg-20260930.xsd#voyg_PrepaidForwardTransactionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ShareRepurchaseProgramDomain_019fcd6b-89e2-7d89-bd55-3feb93236374" xlink:to="loc_voyg_PrepaidForwardTransactionMember_019fcd6b-89e2-739b-bcdd-b6de094341f3" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementClassOfStockAxis_019fcd6b-89e2-7a96-b519-a60bca818458" 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_DebtInstrumentTable_019fcd6b-89e2-7412-8de2-d2dba7cdce86" xlink:to="loc_us-gaap_StatementClassOfStockAxis_019fcd6b-89e2-7a96-b519-a60bca818458" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_019fcd6b-89e2-7a96-b519-a60bca818458_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_019fcd6b-89e2-7a96-b519-a60bca818458" xlink:to="loc_us-gaap_ClassOfStockDomain_019fcd6b-89e2-7a96-b519-a60bca818458_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_019fcd6b-89e2-7ef7-8ebf-c341bdad57cd" 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_019fcd6b-89e2-7a96-b519-a60bca818458" xlink:to="loc_us-gaap_ClassOfStockDomain_019fcd6b-89e2-7ef7-8ebf-c341bdad57cd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonClassAMember_019fcd6b-89e2-7f36-ba98-62d53aec98d0" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonClassAMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_019fcd6b-89e2-7ef7-8ebf-c341bdad57cd" xlink:to="loc_us-gaap_CommonClassAMember_019fcd6b-89e2-7f36-ba98-62d53aec98d0" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockRepurchasedDuringPeriodValue_019fcd6b-89e2-779c-9999-ec125f0a17d3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockRepurchasedDuringPeriodValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019fcd6b-89e2-76a6-83af-6df975061d39" xlink:to="loc_us-gaap_StockRepurchasedDuringPeriodValue_019fcd6b-89e2-779c-9999-ec125f0a17d3" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockRepurchasedDuringPeriodShares_019fcd6b-89e2-7241-9256-fd9570db6353" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockRepurchasedDuringPeriodShares"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019fcd6b-89e2-76a6-83af-6df975061d39" xlink:to="loc_us-gaap_StockRepurchasedDuringPeriodShares_019fcd6b-89e2-7241-9256-fd9570db6353" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockRepurchasedAndRetiredDuringPeriodShares_019fcd6b-89e2-7da0-8c77-fd7c4941a006" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockRepurchasedAndRetiredDuringPeriodShares"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019fcd6b-89e2-76a6-83af-6df975061d39" xlink:to="loc_us-gaap_StockRepurchasedAndRetiredDuringPeriodShares_019fcd6b-89e2-7da0-8c77-fd7c4941a006" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockCommonShares_019fcd6b-89e2-78df-9afd-71733c72e694" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TreasuryStockCommonShares"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019fcd6b-89e2-76a6-83af-6df975061d39" xlink:to="loc_us-gaap_TreasuryStockCommonShares_019fcd6b-89e2-78df-9afd-71733c72e694" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://voyager.com/role/DEBTCreditFacilityDetails" xlink:type="simple" xlink:href="voyg-20260930.xsd#DEBTCreditFacilityDetails"/>
  <link:definitionLink xlink:role="http://voyager.com/role/DEBTCreditFacilityDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_019fcd6b-89e2-7ede-8c2f-e7218d03c282" 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_019fcd6b-89e2-73e2-a36c-3dccdda0f173" 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_019fcd6b-89e2-7ede-8c2f-e7218d03c282" xlink:to="loc_us-gaap_DebtInstrumentTable_019fcd6b-89e2-73e2-a36c-3dccdda0f173" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityAxis_019fcd6b-89e2-7e7d-815c-b7d6f346c1c6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CreditFacilityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019fcd6b-89e2-73e2-a36c-3dccdda0f173" xlink:to="loc_us-gaap_CreditFacilityAxis_019fcd6b-89e2-7e7d-815c-b7d6f346c1c6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_019fcd6b-89e2-7e7d-815c-b7d6f346c1c6_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_CreditFacilityAxis_019fcd6b-89e2-7e7d-815c-b7d6f346c1c6" xlink:to="loc_us-gaap_CreditFacilityDomain_019fcd6b-89e2-7e7d-815c-b7d6f346c1c6_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_019fcd6b-89e2-7f63-bd4c-e1853fb1fd3f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_CreditFacilityAxis_019fcd6b-89e2-7e7d-815c-b7d6f346c1c6" xlink:to="loc_us-gaap_CreditFacilityDomain_019fcd6b-89e2-7f63-bd4c-e1853fb1fd3f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevolvingCreditFacilityMember_019fcd6b-89e2-7d36-ae65-b78d4ea10121" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RevolvingCreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_019fcd6b-89e2-7f63-bd4c-e1853fb1fd3f" xlink:to="loc_us-gaap_RevolvingCreditFacilityMember_019fcd6b-89e2-7d36-ae65-b78d4ea10121" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_019fcd6b-89e2-7b1d-a411-24eca63f5fac" 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_019fcd6b-89e2-73e2-a36c-3dccdda0f173" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_019fcd6b-89e2-7b1d-a411-24eca63f5fac" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019fcd6b-89e2-7b1d-a411-24eca63f5fac_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_019fcd6b-89e2-7b1d-a411-24eca63f5fac" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019fcd6b-89e2-7b1d-a411-24eca63f5fac_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019fcd6b-89e2-77b9-a24e-5937bf7d5e44" 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_019fcd6b-89e2-7b1d-a411-24eca63f5fac" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019fcd6b-89e2-77b9-a24e-5937bf7d5e44" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditMember_019fcd6b-89e2-704b-8707-12e5f56b5684" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LineOfCreditMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_019fcd6b-89e2-77b9-a24e-5937bf7d5e44" xlink:to="loc_us-gaap_LineOfCreditMember_019fcd6b-89e2-704b-8707-12e5f56b5684" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_019fcd6b-89e2-7d8c-948a-cf7de656356a" 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_DebtInstrumentTable_019fcd6b-89e2-73e2-a36c-3dccdda0f173" xlink:to="loc_srt_RangeAxis_019fcd6b-89e2-7d8c-948a-cf7de656356a" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019fcd6b-89e2-7d8c-948a-cf7de656356a_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_019fcd6b-89e2-7d8c-948a-cf7de656356a" xlink:to="loc_srt_RangeMember_019fcd6b-89e2-7d8c-948a-cf7de656356a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019fcd6b-89e2-7c28-bc4a-9b7cd19af5e7" 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_019fcd6b-89e2-7d8c-948a-cf7de656356a" xlink:to="loc_srt_RangeMember_019fcd6b-89e2-7c28-bc4a-9b7cd19af5e7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_019fcd6b-89e2-74e7-bc5c-b21f9a210ae5" 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_019fcd6b-89e2-7c28-bc4a-9b7cd19af5e7" xlink:to="loc_srt_MinimumMember_019fcd6b-89e2-74e7-bc5c-b21f9a210ae5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_019fcd6b-89e2-7db0-9397-df2c35e3d260" 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_019fcd6b-89e2-7c28-bc4a-9b7cd19af5e7" xlink:to="loc_srt_MaximumMember_019fcd6b-89e2-7db0-9397-df2c35e3d260" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_019fcd6b-89e2-7c2d-8135-a9fbe6a1d6ab" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019fcd6b-89e2-7ede-8c2f-e7218d03c282" xlink:to="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_019fcd6b-89e2-7c2d-8135-a9fbe6a1d6ab" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTerm_019fcd6b-89e2-7d97-8bf0-7e5dfdd7e9ff" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentTerm"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019fcd6b-89e2-7ede-8c2f-e7218d03c282" xlink:to="loc_us-gaap_DebtInstrumentTerm_019fcd6b-89e2-7d97-8bf0-7e5dfdd7e9ff" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityCommitmentFeePercentage_019fcd6b-89e2-71b4-a304-e587e91ecefb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LineOfCreditFacilityCommitmentFeePercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019fcd6b-89e2-7ede-8c2f-e7218d03c282" xlink:to="loc_us-gaap_LineOfCreditFacilityCommitmentFeePercentage_019fcd6b-89e2-71b4-a304-e587e91ecefb" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCredit_019fcd6b-89e2-7bca-bb37-0755a530144f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LineOfCredit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019fcd6b-89e2-7ede-8c2f-e7218d03c282" xlink:to="loc_us-gaap_LineOfCredit_019fcd6b-89e2-7bca-bb37-0755a530144f" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_voyg_LineOfCreditFacilityAccordionFeatureIncreaseLimit_019fcd6b-89e2-7a2f-a5b3-00dbcdaac49d" xlink:href="voyg-20260930.xsd#voyg_LineOfCreditFacilityAccordionFeatureIncreaseLimit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019fcd6b-89e2-7ede-8c2f-e7218d03c282" xlink:to="loc_voyg_LineOfCreditFacilityAccordionFeatureIncreaseLimit_019fcd6b-89e2-7a2f-a5b3-00dbcdaac49d" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_voyg_LineOfCreditFacilityAccordionFeatureHigherBorrowingCapacityOption_019fcd6b-89e2-7d59-92ce-1943ac654fa3" xlink:href="voyg-20260930.xsd#voyg_LineOfCreditFacilityAccordionFeatureHigherBorrowingCapacityOption"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019fcd6b-89e2-7ede-8c2f-e7218d03c282" xlink:to="loc_voyg_LineOfCreditFacilityAccordionFeatureHigherBorrowingCapacityOption_019fcd6b-89e2-7d59-92ce-1943ac654fa3" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_019fcd6b-89e2-7975-862c-1e66abfae801" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentBasisSpreadOnVariableRate1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019fcd6b-89e2-7ede-8c2f-e7218d03c282" xlink:to="loc_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_019fcd6b-89e2-7975-862c-1e66abfae801" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage_019fcd6b-89e2-78d3-b948-1eb147d810a0" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019fcd6b-89e2-7ede-8c2f-e7218d03c282" xlink:to="loc_us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage_019fcd6b-89e2-78d3-b948-1eb147d810a0" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityIncreaseDecreaseForPeriodNet_01a143f7-e194-7c7a-a5c0-12c38736c907" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LineOfCreditFacilityIncreaseDecreaseForPeriodNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019fcd6b-89e2-7ede-8c2f-e7218d03c282" xlink:to="loc_us-gaap_LineOfCreditFacilityIncreaseDecreaseForPeriodNet_01a143f7-e194-7c7a-a5c0-12c38736c907" xlink:type="arc" order="8"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://voyager.com/role/DEBTDebtExtinguishmentDetails" xlink:type="simple" xlink:href="voyg-20260930.xsd#DEBTDebtExtinguishmentDetails"/>
  <link:definitionLink xlink:role="http://voyager.com/role/DEBTDebtExtinguishmentDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_019fcd6b-89e2-70e6-a494-44faa27486d9" 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_019fcd6b-89e2-734a-97f7-ae80deddfb7e" 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_019fcd6b-89e2-70e6-a494-44faa27486d9" xlink:to="loc_us-gaap_DebtInstrumentTable_019fcd6b-89e2-734a-97f7-ae80deddfb7e" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_019fcd6b-89e2-7342-9080-65a57231c230" 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_019fcd6b-89e2-734a-97f7-ae80deddfb7e" xlink:to="loc_us-gaap_DebtInstrumentAxis_019fcd6b-89e2-7342-9080-65a57231c230" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019fcd6b-89e2-7342-9080-65a57231c230_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_019fcd6b-89e2-7342-9080-65a57231c230" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019fcd6b-89e2-7342-9080-65a57231c230_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019fcd6b-89e2-7deb-bcf7-c79b815bb31d" 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_019fcd6b-89e2-7342-9080-65a57231c230" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019fcd6b-89e2-7deb-bcf7-c79b815bb31d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_voyg_TermLoanMember_019fcd6b-89e2-76e0-9301-5c3c3b1e6f34" xlink:href="voyg-20260930.xsd#voyg_TermLoanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019fcd6b-89e2-7deb-bcf7-c79b815bb31d" xlink:to="loc_voyg_TermLoanMember_019fcd6b-89e2-76e0-9301-5c3c3b1e6f34" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityAxis_019fcd6b-89e2-7c80-8d0f-395639c24e56" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CreditFacilityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019fcd6b-89e2-734a-97f7-ae80deddfb7e" xlink:to="loc_us-gaap_CreditFacilityAxis_019fcd6b-89e2-7c80-8d0f-395639c24e56" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_019fcd6b-89e2-7c80-8d0f-395639c24e56_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_CreditFacilityAxis_019fcd6b-89e2-7c80-8d0f-395639c24e56" xlink:to="loc_us-gaap_CreditFacilityDomain_019fcd6b-89e2-7c80-8d0f-395639c24e56_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_019fcd6b-89e2-7b0c-982a-ca5339281dca" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_CreditFacilityAxis_019fcd6b-89e2-7c80-8d0f-395639c24e56" xlink:to="loc_us-gaap_CreditFacilityDomain_019fcd6b-89e2-7b0c-982a-ca5339281dca" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevolvingCreditFacilityMember_019fcd6b-89e2-78e1-b76d-d002bc682b41" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RevolvingCreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_019fcd6b-89e2-7b0c-982a-ca5339281dca" xlink:to="loc_us-gaap_RevolvingCreditFacilityMember_019fcd6b-89e2-78e1-b76d-d002bc682b41" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RepaymentsOfLongTermLinesOfCredit_019fcd6b-89e2-76ed-af74-6e513278f0d0" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RepaymentsOfLongTermLinesOfCredit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019fcd6b-89e2-70e6-a494-44faa27486d9" xlink:to="loc_us-gaap_RepaymentsOfLongTermLinesOfCredit_019fcd6b-89e2-76ed-af74-6e513278f0d0" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainsLossesOnExtinguishmentOfDebt_019fcd6b-89e2-7aa0-a6e7-2cffe3963ae3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_GainsLossesOnExtinguishmentOfDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019fcd6b-89e2-70e6-a494-44faa27486d9" xlink:to="loc_us-gaap_GainsLossesOnExtinguishmentOfDebt_019fcd6b-89e2-7aa0-a6e7-2cffe3963ae3" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://voyager.com/role/DEBTTermLoanDetails" xlink:type="simple" xlink:href="voyg-20260930.xsd#DEBTTermLoanDetails"/>
  <link:definitionLink xlink:role="http://voyager.com/role/DEBTTermLoanDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_019fcd6b-89e2-76a4-ad1e-82f60345fce0" 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_019fcd6b-89e2-763a-9641-c05f41759759" 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_019fcd6b-89e2-76a4-ad1e-82f60345fce0" xlink:to="loc_us-gaap_DebtInstrumentTable_019fcd6b-89e2-763a-9641-c05f41759759" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityAxis_019fcd6b-89e2-7399-91e2-50e923177c7a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CreditFacilityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019fcd6b-89e2-763a-9641-c05f41759759" xlink:to="loc_us-gaap_CreditFacilityAxis_019fcd6b-89e2-7399-91e2-50e923177c7a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_019fcd6b-89e2-7399-91e2-50e923177c7a_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_CreditFacilityAxis_019fcd6b-89e2-7399-91e2-50e923177c7a" xlink:to="loc_us-gaap_CreditFacilityDomain_019fcd6b-89e2-7399-91e2-50e923177c7a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_019fcd6b-89e2-74b3-981a-028821d4e23f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_CreditFacilityAxis_019fcd6b-89e2-7399-91e2-50e923177c7a" xlink:to="loc_us-gaap_CreditFacilityDomain_019fcd6b-89e2-74b3-981a-028821d4e23f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SecuredDebtMember_019fcd6b-89e2-70da-a4ab-f6dca37c55b1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SecuredDebtMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_019fcd6b-89e2-74b3-981a-028821d4e23f" xlink:to="loc_us-gaap_SecuredDebtMember_019fcd6b-89e2-70da-a4ab-f6dca37c55b1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_019fcd6b-89e2-7dd5-9ed6-e64b58658dc3" 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_019fcd6b-89e2-763a-9641-c05f41759759" xlink:to="loc_us-gaap_DebtInstrumentAxis_019fcd6b-89e2-7dd5-9ed6-e64b58658dc3" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019fcd6b-89e2-7dd5-9ed6-e64b58658dc3_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_019fcd6b-89e2-7dd5-9ed6-e64b58658dc3" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019fcd6b-89e2-7dd5-9ed6-e64b58658dc3_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019fcd6b-89e2-73f6-bf9a-01ff265b66f3" 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_019fcd6b-89e2-7dd5-9ed6-e64b58658dc3" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019fcd6b-89e2-73f6-bf9a-01ff265b66f3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_voyg_TermLoanMember_019fcd6b-89e2-7112-9ba7-7646760f3be2" xlink:href="voyg-20260930.xsd#voyg_TermLoanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019fcd6b-89e2-73f6-bf9a-01ff265b66f3" xlink:to="loc_voyg_TermLoanMember_019fcd6b-89e2-7112-9ba7-7646760f3be2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableRateAxis_019fcd6b-89e2-76e7-afdd-5bd05183b22b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_VariableRateAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019fcd6b-89e2-763a-9641-c05f41759759" xlink:to="loc_us-gaap_VariableRateAxis_019fcd6b-89e2-76e7-afdd-5bd05183b22b" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableRateDomain_019fcd6b-89e2-76e7-afdd-5bd05183b22b_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_VariableRateDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_VariableRateAxis_019fcd6b-89e2-76e7-afdd-5bd05183b22b" xlink:to="loc_us-gaap_VariableRateDomain_019fcd6b-89e2-76e7-afdd-5bd05183b22b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableRateDomain_019fcd6b-89e2-79ce-909d-2cc1e5ec6205" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_VariableRateDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_VariableRateAxis_019fcd6b-89e2-76e7-afdd-5bd05183b22b" xlink:to="loc_us-gaap_VariableRateDomain_019fcd6b-89e2-79ce-909d-2cc1e5ec6205" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_voyg_WallStreetJournalPrimeRateMember_019fcd6b-89e2-7935-b4a4-1d829e2c041e" xlink:href="voyg-20260930.xsd#voyg_WallStreetJournalPrimeRateMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableRateDomain_019fcd6b-89e2-79ce-909d-2cc1e5ec6205" xlink:to="loc_voyg_WallStreetJournalPrimeRateMember_019fcd6b-89e2-7935-b4a4-1d829e2c041e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_voyg_WallStreetJournalPrimeRateAnnualMember_019fcd6b-89e2-7b11-86eb-683564760775" xlink:href="voyg-20260930.xsd#voyg_WallStreetJournalPrimeRateAnnualMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableRateDomain_019fcd6b-89e2-79ce-909d-2cc1e5ec6205" xlink:to="loc_voyg_WallStreetJournalPrimeRateAnnualMember_019fcd6b-89e2-7b11-86eb-683564760775" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_019fcd6b-89e2-7c59-8c94-91a11891280c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019fcd6b-89e2-76a4-ad1e-82f60345fce0" xlink:to="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_019fcd6b-89e2-7c59-8c94-91a11891280c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_019fcd6b-89e2-7469-b2d3-10275ce82113" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentBasisSpreadOnVariableRate1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019fcd6b-89e2-76a4-ad1e-82f60345fce0" xlink:to="loc_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_019fcd6b-89e2-7469-b2d3-10275ce82113" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_019fcd6b-89e2-793b-98fb-83bde33f5b56" 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_019fcd6b-89e2-76a4-ad1e-82f60345fce0" xlink:to="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_019fcd6b-89e2-793b-98fb-83bde33f5b56" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCredit_019fcd6b-89e2-74b7-ae32-2af585333b50" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LineOfCredit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019fcd6b-89e2-76a4-ad1e-82f60345fce0" xlink:to="loc_us-gaap_LineOfCredit_019fcd6b-89e2-74b7-ae32-2af585333b50" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://voyager.com/role/DEBT2024ConvertibleNotesDetails" xlink:type="simple" xlink:href="voyg-20260930.xsd#DEBT2024ConvertibleNotesDetails"/>
  <link:definitionLink xlink:role="http://voyager.com/role/DEBT2024ConvertibleNotesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_019fcd6b-89e2-7390-84e3-d694da2e41de" 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_019fcd6b-89e2-75d4-a6b9-c14a90858fe5" 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_019fcd6b-89e2-7390-84e3-d694da2e41de" xlink:to="loc_us-gaap_DebtInstrumentTable_019fcd6b-89e2-75d4-a6b9-c14a90858fe5" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_019fcd6b-89e2-7cc2-a4ef-af0f9fca6a79" 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_019fcd6b-89e2-75d4-a6b9-c14a90858fe5" xlink:to="loc_us-gaap_DebtInstrumentAxis_019fcd6b-89e2-7cc2-a4ef-af0f9fca6a79" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019fcd6b-89e2-7cc2-a4ef-af0f9fca6a79_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_019fcd6b-89e2-7cc2-a4ef-af0f9fca6a79" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019fcd6b-89e2-7cc2-a4ef-af0f9fca6a79_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019fcd6b-89e2-78f8-bf7d-b0fb27456360" 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_019fcd6b-89e2-7cc2-a4ef-af0f9fca6a79" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019fcd6b-89e2-78f8-bf7d-b0fb27456360" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_voyg_A2024ConvertibleNotesMember_019fcd6b-89e2-741e-aa64-801af23aaea3" xlink:href="voyg-20260930.xsd#voyg_A2024ConvertibleNotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019fcd6b-89e2-78f8-bf7d-b0fb27456360" xlink:to="loc_voyg_A2024ConvertibleNotesMember_019fcd6b-89e2-741e-aa64-801af23aaea3" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_019fcd6b-89e2-7a5a-b426-3abda0fcb228" 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_019fcd6b-89e2-75d4-a6b9-c14a90858fe5" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_019fcd6b-89e2-7a5a-b426-3abda0fcb228" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019fcd6b-89e2-7a5a-b426-3abda0fcb228_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_019fcd6b-89e2-7a5a-b426-3abda0fcb228" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019fcd6b-89e2-7a5a-b426-3abda0fcb228_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019fcd6b-89e2-72d1-8390-0d03ce91752e" 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_019fcd6b-89e2-7a5a-b426-3abda0fcb228" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019fcd6b-89e2-72d1-8390-0d03ce91752e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConvertibleDebtMember_019fcd6b-89e2-79c3-a837-9c27ed0459e0" 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_019fcd6b-89e2-72d1-8390-0d03ce91752e" xlink:to="loc_us-gaap_ConvertibleDebtMember_019fcd6b-89e2-79c3-a837-9c27ed0459e0" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentFaceAmount_019fcd6b-89e2-73c8-b02b-4083c6e4c294" 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_019fcd6b-89e2-7390-84e3-d694da2e41de" xlink:to="loc_us-gaap_DebtInstrumentFaceAmount_019fcd6b-89e2-73c8-b02b-4083c6e4c294" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebt_019fcd6b-89e2-7f11-8070-6357255e27c7" 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_019fcd6b-89e2-7390-84e3-d694da2e41de" xlink:to="loc_us-gaap_LongTermDebt_019fcd6b-89e2-7f11-8070-6357255e27c7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_019fcd6b-89e2-7c99-9d14-f732af93b0ae" 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_019fcd6b-89e2-7390-84e3-d694da2e41de" xlink:to="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_019fcd6b-89e2-7c99-9d14-f732af93b0ae" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_voyg_DebtCovenantQualifyingEventAmount_019fcd6b-89e2-7607-af1e-f660e43159ac" xlink:href="voyg-20260930.xsd#voyg_DebtCovenantQualifyingEventAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019fcd6b-89e2-7390-84e3-d694da2e41de" xlink:to="loc_voyg_DebtCovenantQualifyingEventAmount_019fcd6b-89e2-7607-af1e-f660e43159ac" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_voyg_DebtCovenantVotingEquityInterestAcquiredPercentage_019fcd6b-89e2-75a8-95ed-232d3742e23c" xlink:href="voyg-20260930.xsd#voyg_DebtCovenantVotingEquityInterestAcquiredPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019fcd6b-89e2-7390-84e3-d694da2e41de" xlink:to="loc_voyg_DebtCovenantVotingEquityInterestAcquiredPercentage_019fcd6b-89e2-75a8-95ed-232d3742e23c" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_voyg_DebtCovenantInvestorsPaidPerUnitPricePercentage_019fcd6b-89e2-7f97-bad5-fc1b2052c1c2" xlink:href="voyg-20260930.xsd#voyg_DebtCovenantInvestorsPaidPerUnitPricePercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019fcd6b-89e2-7390-84e3-d694da2e41de" xlink:to="loc_voyg_DebtCovenantInvestorsPaidPerUnitPricePercentage_019fcd6b-89e2-7f97-bad5-fc1b2052c1c2" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentUnamortizedDiscount_019fcd6b-89e2-7f7c-8f4f-86857ed747bc" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentUnamortizedDiscount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019fcd6b-89e2-7390-84e3-d694da2e41de" xlink:to="loc_us-gaap_DebtInstrumentUnamortizedDiscount_019fcd6b-89e2-7f7c-8f4f-86857ed747bc" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_voyg_DebtInstrumentConvertibleGainLossOnConversion_019fcd6b-89e2-7d7f-b596-73841dffe7fc" xlink:href="voyg-20260930.xsd#voyg_DebtInstrumentConvertibleGainLossOnConversion"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019fcd6b-89e2-7390-84e3-d694da2e41de" xlink:to="loc_voyg_DebtInstrumentConvertibleGainLossOnConversion_019fcd6b-89e2-7d7f-b596-73841dffe7fc" xlink:type="arc" order="7"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://voyager.com/role/REDEEMABLENONCONTROLLINGINTERESTSNarrativeDetails" xlink:type="simple" xlink:href="voyg-20260930.xsd#REDEEMABLENONCONTROLLINGINTERESTSNarrativeDetails"/>
  <link:definitionLink xlink:role="http://voyager.com/role/REDEEMABLENONCONTROLLINGINTERESTSNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RedeemableNoncontrollingInterestLineItems_019fcd6b-89e2-72c2-9d3a-1636f26c3527" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RedeemableNoncontrollingInterestLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RedeemableNoncontrollingInterestByLegalEntityTable_019fcd6b-89e2-7f65-a765-74cac69c4b17" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RedeemableNoncontrollingInterestByLegalEntityTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RedeemableNoncontrollingInterestLineItems_019fcd6b-89e2-72c2-9d3a-1636f26c3527" xlink:to="loc_us-gaap_RedeemableNoncontrollingInterestByLegalEntityTable_019fcd6b-89e2-7f65-a765-74cac69c4b17" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_OwnershipAxis_019fcd6b-89e2-7b56-8ca7-46d22a90fd0a" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_OwnershipAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_RedeemableNoncontrollingInterestByLegalEntityTable_019fcd6b-89e2-7f65-a765-74cac69c4b17" xlink:to="loc_srt_OwnershipAxis_019fcd6b-89e2-7b56-8ca7-46d22a90fd0a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_OwnershipDomain_019fcd6b-89e2-7b56-8ca7-46d22a90fd0a_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_OwnershipDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_OwnershipAxis_019fcd6b-89e2-7b56-8ca7-46d22a90fd0a" xlink:to="loc_srt_OwnershipDomain_019fcd6b-89e2-7b56-8ca7-46d22a90fd0a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_OwnershipDomain_019fcd6b-89e2-7060-b506-5c4b1286ee1d" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_OwnershipDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_OwnershipAxis_019fcd6b-89e2-7b56-8ca7-46d22a90fd0a" xlink:to="loc_srt_OwnershipDomain_019fcd6b-89e2-7060-b506-5c4b1286ee1d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_voyg_XOMarketsHoldingsInc.Member_019fcd6b-89e2-75fe-84e4-530b2ef69128" xlink:href="voyg-20260930.xsd#voyg_XOMarketsHoldingsInc.Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_OwnershipDomain_019fcd6b-89e2-7060-b506-5c4b1286ee1d" xlink:to="loc_voyg_XOMarketsHoldingsInc.Member_019fcd6b-89e2-75fe-84e4-530b2ef69128" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_voyg_ValleyTechSystemsIncMember_019fcd6b-89e2-7b53-ac27-8e382e17d86a" xlink:href="voyg-20260930.xsd#voyg_ValleyTechSystemsIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_OwnershipDomain_019fcd6b-89e2-7060-b506-5c4b1286ee1d" xlink:to="loc_voyg_ValleyTechSystemsIncMember_019fcd6b-89e2-7b53-ac27-8e382e17d86a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsForRepurchaseOfRedeemableNoncontrollingInterest_019fcd6b-89e2-7c9d-a6de-e019a43e9cc5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PaymentsForRepurchaseOfRedeemableNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RedeemableNoncontrollingInterestLineItems_019fcd6b-89e2-72c2-9d3a-1636f26c3527" xlink:to="loc_us-gaap_PaymentsForRepurchaseOfRedeemableNoncontrollingInterest_019fcd6b-89e2-7c9d-a6de-e019a43e9cc5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NoncontrollingInterestIncreaseFromSubsidiaryEquityIssuance_019fcd6b-89e2-7d07-9f44-fdcbfa05b5d5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NoncontrollingInterestIncreaseFromSubsidiaryEquityIssuance"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RedeemableNoncontrollingInterestLineItems_019fcd6b-89e2-72c2-9d3a-1636f26c3527" xlink:to="loc_us-gaap_NoncontrollingInterestIncreaseFromSubsidiaryEquityIssuance_019fcd6b-89e2-7d07-9f44-fdcbfa05b5d5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MinorityInterestOwnershipPercentageByParent_019fcd6b-89e2-76c7-8029-27c0b7dcecf3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_MinorityInterestOwnershipPercentageByParent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RedeemableNoncontrollingInterestLineItems_019fcd6b-89e2-72c2-9d3a-1636f26c3527" xlink:to="loc_us-gaap_MinorityInterestOwnershipPercentageByParent_019fcd6b-89e2-76c7-8029-27c0b7dcecf3" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://voyager.com/role/REDEEMABLENONCONTROLLINGINTERESTSScheduleofRedeemableNoncontrollingInterestDetails" xlink:type="simple" xlink:href="voyg-20260930.xsd#REDEEMABLENONCONTROLLINGINTERESTSScheduleofRedeemableNoncontrollingInterestDetails"/>
  <link:definitionLink xlink:role="http://voyager.com/role/REDEEMABLENONCONTROLLINGINTERESTSScheduleofRedeemableNoncontrollingInterestDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RedeemableNoncontrollingInterestLineItems_019fcd6b-89e2-77f3-aae6-fc023d21caff" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RedeemableNoncontrollingInterestLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RedeemableNoncontrollingInterestByLegalEntityTable_019fcd6b-89e2-707c-8347-24f5d730af3f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RedeemableNoncontrollingInterestByLegalEntityTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RedeemableNoncontrollingInterestLineItems_019fcd6b-89e2-77f3-aae6-fc023d21caff" xlink:to="loc_us-gaap_RedeemableNoncontrollingInterestByLegalEntityTable_019fcd6b-89e2-707c-8347-24f5d730af3f" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_OwnershipAxis_019fcd6b-89e2-70c9-b3a8-cdb88134fe05" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_OwnershipAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_RedeemableNoncontrollingInterestByLegalEntityTable_019fcd6b-89e2-707c-8347-24f5d730af3f" xlink:to="loc_srt_OwnershipAxis_019fcd6b-89e2-70c9-b3a8-cdb88134fe05" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_OwnershipDomain_019fcd6b-89e2-70c9-b3a8-cdb88134fe05_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_OwnershipDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_OwnershipAxis_019fcd6b-89e2-70c9-b3a8-cdb88134fe05" xlink:to="loc_srt_OwnershipDomain_019fcd6b-89e2-70c9-b3a8-cdb88134fe05_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_OwnershipDomain_019fcd6b-89e2-7b2c-8a24-05491a211f89" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_OwnershipDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_OwnershipAxis_019fcd6b-89e2-70c9-b3a8-cdb88134fe05" xlink:to="loc_srt_OwnershipDomain_019fcd6b-89e2-7b2c-8a24-05491a211f89" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_voyg_XOMarketsHoldingsInc.Member_019fcd6b-89e2-7e5e-8bd3-deef296b049b" xlink:href="voyg-20260930.xsd#voyg_XOMarketsHoldingsInc.Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_OwnershipDomain_019fcd6b-89e2-7b2c-8a24-05491a211f89" xlink:to="loc_voyg_XOMarketsHoldingsInc.Member_019fcd6b-89e2-7e5e-8bd3-deef296b049b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_voyg_ValleyTechSystemsIncMember_019fcd6b-89e2-7f8f-9e21-2d37b8cbebf4" xlink:href="voyg-20260930.xsd#voyg_ValleyTechSystemsIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_OwnershipDomain_019fcd6b-89e2-7b2c-8a24-05491a211f89" xlink:to="loc_voyg_ValleyTechSystemsIncMember_019fcd6b-89e2-7f8f-9e21-2d37b8cbebf4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MovementInMinorityInterestRollForward_019fcd6b-89e2-7da7-a4bf-465d30181c79" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_MovementInMinorityInterestRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RedeemableNoncontrollingInterestLineItems_019fcd6b-89e2-77f3-aae6-fc023d21caff" xlink:to="loc_us-gaap_MovementInMinorityInterestRollForward_019fcd6b-89e2-7da7-a4bf-465d30181c79" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RedeemableNoncontrollingInterestEquityCarryingAmount_019fcd6b-89e2-7c3e-8daa-20a4f3a3e296" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RedeemableNoncontrollingInterestEquityCarryingAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MovementInMinorityInterestRollForward_019fcd6b-89e2-7da7-a4bf-465d30181c79" xlink:to="loc_us-gaap_RedeemableNoncontrollingInterestEquityCarryingAmount_019fcd6b-89e2-7c3e-8daa-20a4f3a3e296" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLossAttributableToRedeemableNoncontrollingInterest_019fcd6b-89e2-7f29-866e-ecea53a169fb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetIncomeLossAttributableToRedeemableNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MovementInMinorityInterestRollForward_019fcd6b-89e2-7da7-a4bf-465d30181c79" xlink:to="loc_us-gaap_NetIncomeLossAttributableToRedeemableNoncontrollingInterest_019fcd6b-89e2-7f29-866e-ecea53a169fb" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MinorityInterestDecreaseFromRedemptions_019fcd6b-89e2-7cbf-831f-369680fc92e3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_MinorityInterestDecreaseFromRedemptions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MovementInMinorityInterestRollForward_019fcd6b-89e2-7da7-a4bf-465d30181c79" xlink:to="loc_us-gaap_MinorityInterestDecreaseFromRedemptions_019fcd6b-89e2-7cbf-831f-369680fc92e3" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RedeemableNoncontrollingInterestEquityCarryingAmount_019fcd6b-89e2-7bd7-96be-1b9ed5a33738" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RedeemableNoncontrollingInterestEquityCarryingAmount"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://voyager.com/role/STOCKBASEDCOMPENSATIONNarrativeDetails" xlink:type="simple" xlink:href="voyg-20260930.xsd#STOCKBASEDCOMPENSATIONNarrativeDetails"/>
  <link:definitionLink xlink:role="http://voyager.com/role/STOCKBASEDCOMPENSATIONNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019fcd6b-89e2-723e-a010-ebfdad9fd028" 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_019fcd6b-89e2-73db-9a10-a81e8e80d455" 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_019fcd6b-89e2-723e-a010-ebfdad9fd028" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019fcd6b-89e2-73db-9a10-a81e8e80d455" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameAxis_019fcd6b-89e2-76b0-bd79-518aea05ae4d" 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_019fcd6b-89e2-73db-9a10-a81e8e80d455" xlink:to="loc_us-gaap_PlanNameAxis_019fcd6b-89e2-76b0-bd79-518aea05ae4d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_019fcd6b-89e2-76b0-bd79-518aea05ae4d_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_019fcd6b-89e2-76b0-bd79-518aea05ae4d" xlink:to="loc_us-gaap_PlanNameDomain_019fcd6b-89e2-76b0-bd79-518aea05ae4d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_019fcd6b-89e2-7d52-b521-d966e5280e7d" 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_019fcd6b-89e2-76b0-bd79-518aea05ae4d" xlink:to="loc_us-gaap_PlanNameDomain_019fcd6b-89e2-7d52-b521-d966e5280e7d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_voyg_A2025IncentiveAwardPlanMember_019fcd6b-89e2-76a6-8dcf-f6ee7208f1f7" xlink:href="voyg-20260930.xsd#voyg_A2025IncentiveAwardPlanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanNameDomain_019fcd6b-89e2-7d52-b521-d966e5280e7d" xlink:to="loc_voyg_A2025IncentiveAwardPlanMember_019fcd6b-89e2-76a6-8dcf-f6ee7208f1f7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_019fcd6b-89e2-7276-97b5-9715e5253bf1" 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_019fcd6b-89e2-73db-9a10-a81e8e80d455" xlink:to="loc_us-gaap_AwardTypeAxis_019fcd6b-89e2-7276-97b5-9715e5253bf1" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019fcd6b-89e2-7276-97b5-9715e5253bf1_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_019fcd6b-89e2-7276-97b5-9715e5253bf1" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019fcd6b-89e2-7276-97b5-9715e5253bf1_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019fcd6b-89e2-7f5f-a72d-71ff59552612" 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_019fcd6b-89e2-7276-97b5-9715e5253bf1" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019fcd6b-89e2-7f5f-a72d-71ff59552612" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedStockMember_019fcd6b-89e2-748c-8601-5413d192fcb3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RestrictedStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019fcd6b-89e2-7f5f-a72d-71ff59552612" xlink:to="loc_us-gaap_RestrictedStockMember_019fcd6b-89e2-748c-8601-5413d192fcb3" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedStockUnitsRSUMember_019fcd6b-89e2-78ce-88ef-e51039dc48b5" 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_019fcd6b-89e2-7f5f-a72d-71ff59552612" xlink:to="loc_us-gaap_RestrictedStockUnitsRSUMember_019fcd6b-89e2-78ce-88ef-e51039dc48b5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeStockOptionMember_019fcd6b-89e2-76e3-9459-08c520431ebd" 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_019fcd6b-89e2-7f5f-a72d-71ff59552612" xlink:to="loc_us-gaap_EmployeeStockOptionMember_019fcd6b-89e2-76e3-9459-08c520431ebd" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized_019fcd6b-89e2-719f-b258-6a6e5788cf9a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019fcd6b-89e2-723e-a010-ebfdad9fd028" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized_019fcd6b-89e2-719f-b258-6a6e5788cf9a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardPercentageOfOutstandingStockMaximum_019fcd6b-89e2-7b6e-b89c-6b9538ee1ec9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardPercentageOfOutstandingStockMaximum"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019fcd6b-89e2-723e-a010-ebfdad9fd028" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardPercentageOfOutstandingStockMaximum_019fcd6b-89e2-7b6e-b89c-6b9538ee1ec9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant_019fcd6b-89e2-770b-b1e3-97c14facff0c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019fcd6b-89e2-723e-a010-ebfdad9fd028" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant_019fcd6b-89e2-770b-b1e3-97c14facff0c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardRequisiteServicePeriod1_019fcd6b-89e2-762b-a4da-494e1e878ef7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardRequisiteServicePeriod1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019fcd6b-89e2-723e-a010-ebfdad9fd028" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardRequisiteServicePeriod1_019fcd6b-89e2-762b-a4da-494e1e878ef7" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllocatedShareBasedCompensationExpense_019fcd6b-89e2-7aaa-a483-e519341b70c2" 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_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019fcd6b-89e2-723e-a010-ebfdad9fd028" xlink:to="loc_us-gaap_AllocatedShareBasedCompensationExpense_019fcd6b-89e2-7aaa-a483-e519341b70c2" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://voyager.com/role/STOCKBASEDCOMPENSATIONScheduleofRSAandRSUDetails" xlink:type="simple" xlink:href="voyg-20260930.xsd#STOCKBASEDCOMPENSATIONScheduleofRSAandRSUDetails"/>
  <link:definitionLink xlink:role="http://voyager.com/role/STOCKBASEDCOMPENSATIONScheduleofRSAandRSUDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019fcd6b-89e2-7c74-ac4c-87b9e964e143" 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_019fcd6b-89e2-7214-a662-173ee2c10394" 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_019fcd6b-89e2-7c74-ac4c-87b9e964e143" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019fcd6b-89e2-7214-a662-173ee2c10394" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_019fcd6b-89e2-7707-866f-6ae21597c3e9" 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_019fcd6b-89e2-7214-a662-173ee2c10394" xlink:to="loc_us-gaap_AwardTypeAxis_019fcd6b-89e2-7707-866f-6ae21597c3e9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019fcd6b-89e2-7707-866f-6ae21597c3e9_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_019fcd6b-89e2-7707-866f-6ae21597c3e9" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019fcd6b-89e2-7707-866f-6ae21597c3e9_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019fcd6b-89e2-7590-9abe-d317003b5677" 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_019fcd6b-89e2-7707-866f-6ae21597c3e9" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019fcd6b-89e2-7590-9abe-d317003b5677" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedStockMember_019fcd6b-89e2-7a4e-b106-88672ef1ddd6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RestrictedStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019fcd6b-89e2-7590-9abe-d317003b5677" xlink:to="loc_us-gaap_RestrictedStockMember_019fcd6b-89e2-7a4e-b106-88672ef1ddd6" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedStockUnitsRSUMember_019fcd6b-89e2-7843-a50a-b2cdffe50d86" 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_019fcd6b-89e2-7590-9abe-d317003b5677" xlink:to="loc_us-gaap_RestrictedStockUnitsRSUMember_019fcd6b-89e2-7843-a50a-b2cdffe50d86" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameAxis_019fcd6b-89e2-7270-b6b5-0e2a5d3b7462" 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_019fcd6b-89e2-7214-a662-173ee2c10394" xlink:to="loc_us-gaap_PlanNameAxis_019fcd6b-89e2-7270-b6b5-0e2a5d3b7462" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_019fcd6b-89e2-7270-b6b5-0e2a5d3b7462_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_019fcd6b-89e2-7270-b6b5-0e2a5d3b7462" xlink:to="loc_us-gaap_PlanNameDomain_019fcd6b-89e2-7270-b6b5-0e2a5d3b7462_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_019fcd6b-89e2-724f-bc0b-70bf9181eb95" 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_019fcd6b-89e2-7270-b6b5-0e2a5d3b7462" xlink:to="loc_us-gaap_PlanNameDomain_019fcd6b-89e2-724f-bc0b-70bf9181eb95" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_voyg_A2025IncentiveAwardPlanMember_019fcd6b-89e2-740a-974b-5bfc3f51ae78" xlink:href="voyg-20260930.xsd#voyg_A2025IncentiveAwardPlanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanNameDomain_019fcd6b-89e2-724f-bc0b-70bf9181eb95" xlink:to="loc_voyg_A2025IncentiveAwardPlanMember_019fcd6b-89e2-740a-974b-5bfc3f51ae78" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingRollForward_019fcd6b-89e2-77fd-b4c9-fa415d5be381" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019fcd6b-89e2-7c74-ac4c-87b9e964e143" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingRollForward_019fcd6b-89e2-77fd-b4c9-fa415d5be381" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_019fcd6b-89e2-72fa-accc-4adda5831ced" 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_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingRollForward_019fcd6b-89e2-77fd-b4c9-fa415d5be381" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_019fcd6b-89e2-72fa-accc-4adda5831ced" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_019fcd6b-89e2-7f84-8cc6-a62856d5d133" 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_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingRollForward_019fcd6b-89e2-77fd-b4c9-fa415d5be381" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_019fcd6b-89e2-7f84-8cc6-a62856d5d133" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_019fcd6b-89e2-7db8-b069-78302db2ae56" 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_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingRollForward_019fcd6b-89e2-77fd-b4c9-fa415d5be381" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_019fcd6b-89e2-7db8-b069-78302db2ae56" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_019fcd6b-89e2-7b5f-8b5e-398f7ec682ca" 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_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingRollForward_019fcd6b-89e2-77fd-b4c9-fa415d5be381" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_019fcd6b-89e2-7b5f-8b5e-398f7ec682ca" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_019fcd6b-89e2-734b-8085-672786ae9e99" 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_019fcd6b-89e2-7fdf-ae44-72ec272f48e1" 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_019fcd6b-89e2-7c74-ac4c-87b9e964e143" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_019fcd6b-89e2-7fdf-ae44-72ec272f48e1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_019fcd6b-89e2-756c-a3c8-0d3abcc7e637" 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_019fcd6b-89e2-7fdf-ae44-72ec272f48e1" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_019fcd6b-89e2-756c-a3c8-0d3abcc7e637" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_019fcd6b-89e2-7ccf-a523-5e59815af654" 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_019fcd6b-89e2-7fdf-ae44-72ec272f48e1" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_019fcd6b-89e2-7ccf-a523-5e59815af654" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_019fcd6b-89e2-739b-a53b-a396b83d15fe" 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_019fcd6b-89e2-7fdf-ae44-72ec272f48e1" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_019fcd6b-89e2-739b-a53b-a396b83d15fe" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_019fcd6b-89e2-7ee1-928e-17fcb3668aa7" 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_019fcd6b-89e2-7fdf-ae44-72ec272f48e1" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_019fcd6b-89e2-7ee1-928e-17fcb3668aa7" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_019fcd6b-89e2-7012-bc0d-6e68d7f47fa7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://voyager.com/role/STOCKBASEDCOMPENSATIONScheduleofOptionsActivityDetails" xlink:type="simple" xlink:href="voyg-20260930.xsd#STOCKBASEDCOMPENSATIONScheduleofOptionsActivityDetails"/>
  <link:definitionLink xlink:role="http://voyager.com/role/STOCKBASEDCOMPENSATIONScheduleofOptionsActivityDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019fcd6b-89e2-774d-adc2-8a460320116f" 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_019fcd6b-89e2-781e-b740-3bb94bf908bd" 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_019fcd6b-89e2-774d-adc2-8a460320116f" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019fcd6b-89e2-781e-b740-3bb94bf908bd" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_019fcd6b-89e2-7d83-9f19-42e8dea90ac6" 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_019fcd6b-89e2-781e-b740-3bb94bf908bd" xlink:to="loc_us-gaap_AwardTypeAxis_019fcd6b-89e2-7d83-9f19-42e8dea90ac6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019fcd6b-89e2-7d83-9f19-42e8dea90ac6_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_019fcd6b-89e2-7d83-9f19-42e8dea90ac6" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019fcd6b-89e2-7d83-9f19-42e8dea90ac6_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019fcd6b-89e2-7f66-aa18-8661ead11ba3" 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_019fcd6b-89e2-7d83-9f19-42e8dea90ac6" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019fcd6b-89e2-7f66-aa18-8661ead11ba3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeStockOptionMember_019fcd6b-89e2-7486-92fa-7ba375109cd0" 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_019fcd6b-89e2-7f66-aa18-8661ead11ba3" xlink:to="loc_us-gaap_EmployeeStockOptionMember_019fcd6b-89e2-7486-92fa-7ba375109cd0" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameAxis_019fcd6b-89e2-7075-afc2-a3e64713a972" 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_019fcd6b-89e2-781e-b740-3bb94bf908bd" xlink:to="loc_us-gaap_PlanNameAxis_019fcd6b-89e2-7075-afc2-a3e64713a972" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_019fcd6b-89e2-7075-afc2-a3e64713a972_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_019fcd6b-89e2-7075-afc2-a3e64713a972" xlink:to="loc_us-gaap_PlanNameDomain_019fcd6b-89e2-7075-afc2-a3e64713a972_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_019fcd6b-89e2-7a08-a8f0-8a139b18d4ad" 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_019fcd6b-89e2-7075-afc2-a3e64713a972" xlink:to="loc_us-gaap_PlanNameDomain_019fcd6b-89e2-7a08-a8f0-8a139b18d4ad" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_voyg_A2020IncentiveAwardPlanMember_019fcd6b-89e2-73f3-b789-7a621adc21a6" xlink:href="voyg-20260930.xsd#voyg_A2020IncentiveAwardPlanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanNameDomain_019fcd6b-89e2-7a08-a8f0-8a139b18d4ad" xlink:to="loc_voyg_A2020IncentiveAwardPlanMember_019fcd6b-89e2-73f3-b789-7a621adc21a6" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_019fcd6b-89e2-72c7-9ef9-61e1e46350e1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019fcd6b-89e2-774d-adc2-8a460320116f" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_019fcd6b-89e2-72c7-9ef9-61e1e46350e1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_019fcd6b-89e2-7176-b6b7-13b558139a48" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_019fcd6b-89e2-72c7-9ef9-61e1e46350e1" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_019fcd6b-89e2-7176-b6b7-13b558139a48" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross_019fcd6b-89e2-73f5-9059-30aa3655e320" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_019fcd6b-89e2-72c7-9ef9-61e1e46350e1" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross_019fcd6b-89e2-73f5-9059-30aa3655e320" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod_019fcd6b-89e2-7c84-b23f-0d730b56e4ea" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_019fcd6b-89e2-72c7-9ef9-61e1e46350e1" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod_019fcd6b-89e2-7c84-b23f-0d730b56e4ea" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_019fcd6b-89e2-7303-8cd6-3cf42032fa80" 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_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_019fcd6b-89e2-72c7-9ef9-61e1e46350e1" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_019fcd6b-89e2-7303-8cd6-3cf42032fa80" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_019fcd6b-89e2-75b5-8b70-77ea31d7be27" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableNumber_019fcd6b-89e2-7e41-a7ba-c99fa37fa9dd" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019fcd6b-89e2-774d-adc2-8a460320116f" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableNumber_019fcd6b-89e2-7e41-a7ba-c99fa37fa9dd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedNumberOfShares_019fcd6b-89e2-7259-b911-08270795d6b6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedNumberOfShares"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019fcd6b-89e2-774d-adc2-8a460320116f" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedNumberOfShares_019fcd6b-89e2-7259-b911-08270795d6b6" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward_019fcd6b-89e2-7012-8d72-1ccee18405f6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019fcd6b-89e2-774d-adc2-8a460320116f" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward_019fcd6b-89e2-7012-8d72-1ccee18405f6" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_019fcd6b-89e2-7890-aee0-d6e817e84cc2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward_019fcd6b-89e2-7012-8d72-1ccee18405f6" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_019fcd6b-89e2-7890-aee0-d6e817e84cc2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice_019fcd6b-89e2-7e5f-a6ec-5f7a953e1ff7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward_019fcd6b-89e2-7012-8d72-1ccee18405f6" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice_019fcd6b-89e2-7e5f-a6ec-5f7a953e1ff7" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice_019fcd6b-89e2-7a24-94b2-095f1b3e6d11" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward_019fcd6b-89e2-7012-8d72-1ccee18405f6" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice_019fcd6b-89e2-7a24-94b2-095f1b3e6d11" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice_019fcd6b-89e2-782f-8dc6-f5953f83a39c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward_019fcd6b-89e2-7012-8d72-1ccee18405f6" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice_019fcd6b-89e2-782f-8dc6-f5953f83a39c" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_019fcd6b-89e2-739a-946b-340edaf16f47" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableWeightedAverageExercisePrice_019fcd6b-89e2-724b-ba5a-3cd771157a80" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableWeightedAverageExercisePrice"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019fcd6b-89e2-774d-adc2-8a460320116f" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableWeightedAverageExercisePrice_019fcd6b-89e2-724b-ba5a-3cd771157a80" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedWeightedAverageGrantDateFairValue_019fcd6b-89e2-71c4-bbb8-cf7c6369a91d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019fcd6b-89e2-774d-adc2-8a460320116f" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedWeightedAverageGrantDateFairValue_019fcd6b-89e2-71c4-bbb8-cf7c6369a91d" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedWeightedAverageGrantDateFairValueAbstract_019fcd6b-89e2-79a7-a327-13f324bad353" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedWeightedAverageGrantDateFairValueAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019fcd6b-89e2-774d-adc2-8a460320116f" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedWeightedAverageGrantDateFairValueAbstract_019fcd6b-89e2-79a7-a327-13f324bad353" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_voyg_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageGrantDateFairValue_019fcd6b-89e2-794e-a3bb-b0b01a20e37f" xlink:href="voyg-20260930.xsd#voyg_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedWeightedAverageGrantDateFairValueAbstract_019fcd6b-89e2-79a7-a327-13f324bad353" xlink:to="loc_voyg_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageGrantDateFairValue_019fcd6b-89e2-794e-a3bb-b0b01a20e37f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_019fcd6b-89e2-7da6-af5b-76c9dbc0d32a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedWeightedAverageGrantDateFairValueAbstract_019fcd6b-89e2-79a7-a327-13f324bad353" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_019fcd6b-89e2-7da6-af5b-76c9dbc0d32a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedOptionsForfeitedWeightedAverageGrantDateFairValue_019fcd6b-89e2-7504-b2da-7f623db2af9a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedOptionsForfeitedWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedWeightedAverageGrantDateFairValueAbstract_019fcd6b-89e2-79a7-a327-13f324bad353" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedOptionsForfeitedWeightedAverageGrantDateFairValue_019fcd6b-89e2-7504-b2da-7f623db2af9a" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_voyg_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisedInPeriodWeightedAverageGrantDateFairValue_019fcd6b-89e2-709c-9ab7-13f674a25357" xlink:href="voyg-20260930.xsd#voyg_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisedInPeriodWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedWeightedAverageGrantDateFairValueAbstract_019fcd6b-89e2-79a7-a327-13f324bad353" xlink:to="loc_voyg_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisedInPeriodWeightedAverageGrantDateFairValue_019fcd6b-89e2-709c-9ab7-13f674a25357" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_voyg_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageGrantDateFairValue_019fcd6b-89e2-7e8d-9119-69bc43a30708" xlink:href="voyg-20260930.xsd#voyg_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageGrantDateFairValue"/>
    <link:loc xlink:type="locator" xlink:label="loc_voyg_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableWeightedGrantDateFairValue_019fcd6b-89e2-7d16-9fa3-060f6ec2a3b9" xlink:href="voyg-20260930.xsd#voyg_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableWeightedGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019fcd6b-89e2-774d-adc2-8a460320116f" xlink:to="loc_voyg_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableWeightedGrantDateFairValue_019fcd6b-89e2-7d16-9fa3-060f6ec2a3b9" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_voyg_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsNonvestedWeightedAverageGrantDateFairValue1_019fcd6b-89e2-7540-a8db-831cd0d8fdd1" xlink:href="voyg-20260930.xsd#voyg_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsNonvestedWeightedAverageGrantDateFairValue1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019fcd6b-89e2-774d-adc2-8a460320116f" xlink:to="loc_voyg_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsNonvestedWeightedAverageGrantDateFairValue1_019fcd6b-89e2-7540-a8db-831cd0d8fdd1" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAdditionalDisclosuresAbstract_019fcd6b-89e2-714a-a41a-34a3b76002df" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAdditionalDisclosuresAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019fcd6b-89e2-774d-adc2-8a460320116f" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAdditionalDisclosuresAbstract_019fcd6b-89e2-714a-a41a-34a3b76002df" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2_019fcd6b-89e2-7a93-ada5-2352831d9b55" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAdditionalDisclosuresAbstract_019fcd6b-89e2-714a-a41a-34a3b76002df" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2_019fcd6b-89e2-7a93-ada5-2352831d9b55" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_voyg_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantedWeightedAverageRemainingContractualTerm_019fcd6b-89e2-7316-aa84-2254d15890ac" xlink:href="voyg-20260930.xsd#voyg_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantedWeightedAverageRemainingContractualTerm"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAdditionalDisclosuresAbstract_019fcd6b-89e2-714a-a41a-34a3b76002df" xlink:to="loc_voyg_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantedWeightedAverageRemainingContractualTerm_019fcd6b-89e2-7316-aa84-2254d15890ac" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedAndExpectedToVestExercisableWeightedAverageRemainingContractualTerm1_019fcd6b-89e2-7fec-b023-5dc7559c2556" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedAndExpectedToVestExercisableWeightedAverageRemainingContractualTerm1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019fcd6b-89e2-774d-adc2-8a460320116f" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedAndExpectedToVestExercisableWeightedAverageRemainingContractualTerm1_019fcd6b-89e2-7fec-b023-5dc7559c2556" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_voyg_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsNonvestedWeightedAverageRemainingContractualTerm_019fcd6b-89e2-75dd-b9f6-d1833f51490b" xlink:href="voyg-20260930.xsd#voyg_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsNonvestedWeightedAverageRemainingContractualTerm"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019fcd6b-89e2-774d-adc2-8a460320116f" xlink:to="loc_voyg_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsNonvestedWeightedAverageRemainingContractualTerm_019fcd6b-89e2-75dd-b9f6-d1833f51490b" xlink:type="arc" order="11"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://voyager.com/role/NETSALESScheduleofDisaggregationofNetSalesDetails" xlink:type="simple" xlink:href="voyg-20260930.xsd#NETSALESScheduleofDisaggregationofNetSalesDetails"/>
  <link:definitionLink xlink:role="http://voyager.com/role/NETSALESScheduleofDisaggregationofNetSalesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentReportingInformationLineItems_019fcd6b-89e2-7ad5-9df1-5c27cc725ab8" 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_019fcd6b-89e2-797b-87b9-8b9af97778a8" 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_019fcd6b-89e2-7ad5-9df1-5c27cc725ab8" xlink:to="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_019fcd6b-89e2-797b-87b9-8b9af97778a8" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MajorCustomersAxis_019fcd6b-89e2-7bc0-8de3-ee39d9dd632d" 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_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_019fcd6b-89e2-797b-87b9-8b9af97778a8" xlink:to="loc_srt_MajorCustomersAxis_019fcd6b-89e2-7bc0-8de3-ee39d9dd632d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_NameOfMajorCustomerDomain_019fcd6b-89e2-7bc0-8de3-ee39d9dd632d_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_019fcd6b-89e2-7bc0-8de3-ee39d9dd632d" xlink:to="loc_srt_NameOfMajorCustomerDomain_019fcd6b-89e2-7bc0-8de3-ee39d9dd632d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_NameOfMajorCustomerDomain_019fcd6b-89e2-7a11-bdda-516b019b460c" 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_019fcd6b-89e2-7bc0-8de3-ee39d9dd632d" xlink:to="loc_srt_NameOfMajorCustomerDomain_019fcd6b-89e2-7a11-bdda-516b019b460c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_voyg_USGovernmentMember_019fcd6b-89e2-7f6a-95d4-b1fe4966782d" xlink:href="voyg-20260930.xsd#voyg_USGovernmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_NameOfMajorCustomerDomain_019fcd6b-89e2-7a11-bdda-516b019b460c" xlink:to="loc_voyg_USGovernmentMember_019fcd6b-89e2-7f6a-95d4-b1fe4966782d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_voyg_InternationalGovernmentMember_019fcd6b-89e2-776e-88d2-583506698e0e" xlink:href="voyg-20260930.xsd#voyg_InternationalGovernmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_NameOfMajorCustomerDomain_019fcd6b-89e2-7a11-bdda-516b019b460c" xlink:to="loc_voyg_InternationalGovernmentMember_019fcd6b-89e2-776e-88d2-583506698e0e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_voyg_CommercialMember_019fcd6b-89e2-7bb8-b0c8-076790a17194" xlink:href="voyg-20260930.xsd#voyg_CommercialMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_NameOfMajorCustomerDomain_019fcd6b-89e2-7a11-bdda-516b019b460c" xlink:to="loc_voyg_CommercialMember_019fcd6b-89e2-7bb8-b0c8-076790a17194" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsAxis_019fcd6b-89e2-7b0f-a8ff-bbee210cbb50" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ConsolidationItemsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_019fcd6b-89e2-797b-87b9-8b9af97778a8" xlink:to="loc_srt_ConsolidationItemsAxis_019fcd6b-89e2-7b0f-a8ff-bbee210cbb50" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_019fcd6b-89e2-7b0f-a8ff-bbee210cbb50_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidationItemsAxis_019fcd6b-89e2-7b0f-a8ff-bbee210cbb50" xlink:to="loc_srt_ConsolidationItemsDomain_019fcd6b-89e2-7b0f-a8ff-bbee210cbb50_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_019fcd6b-89e2-7f73-9d53-b83a7299df81" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidationItemsAxis_019fcd6b-89e2-7b0f-a8ff-bbee210cbb50" xlink:to="loc_srt_ConsolidationItemsDomain_019fcd6b-89e2-7f73-9d53-b83a7299df81" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingSegmentsMember_019fcd6b-89e2-7b5b-b4bd-9b1f35d0bdad" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingSegmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_019fcd6b-89e2-7f73-9d53-b83a7299df81" xlink:to="loc_us-gaap_OperatingSegmentsMember_019fcd6b-89e2-7b5b-b4bd-9b1f35d0bdad" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IntersegmentEliminationMember_019fcd6b-89e2-7c92-a502-a4b5b5678626" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IntersegmentEliminationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_019fcd6b-89e2-7f73-9d53-b83a7299df81" xlink:to="loc_us-gaap_IntersegmentEliminationMember_019fcd6b-89e2-7c92-a502-a4b5b5678626" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_019fcd6b-89e2-7f94-9218-ebb67a8ccfbf" 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_019fcd6b-89e2-797b-87b9-8b9af97778a8" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_019fcd6b-89e2-7f94-9218-ebb67a8ccfbf" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_019fcd6b-89e2-7f94-9218-ebb67a8ccfbf_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_019fcd6b-89e2-7f94-9218-ebb67a8ccfbf" xlink:to="loc_us-gaap_SegmentDomain_019fcd6b-89e2-7f94-9218-ebb67a8ccfbf_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_019fcd6b-89e2-7dcf-9fa5-1be69342c6a8" 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_019fcd6b-89e2-7f94-9218-ebb67a8ccfbf" xlink:to="loc_us-gaap_SegmentDomain_019fcd6b-89e2-7dcf-9fa5-1be69342c6a8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_voyg_DefenseAndSpaceTechnologiesMember_019fcd6b-89e2-7de5-a6ec-a7759861a360" xlink:href="voyg-20260930.xsd#voyg_DefenseAndSpaceTechnologiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019fcd6b-89e2-7dcf-9fa5-1be69342c6a8" xlink:to="loc_voyg_DefenseAndSpaceTechnologiesMember_019fcd6b-89e2-7de5-a6ec-a7759861a360" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_voyg_StarlabSpaceStationsMember_019fcd6b-89e2-709c-a9b1-d861bdd073d2" xlink:href="voyg-20260930.xsd#voyg_StarlabSpaceStationsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019fcd6b-89e2-7dcf-9fa5-1be69342c6a8" xlink:to="loc_voyg_StarlabSpaceStationsMember_019fcd6b-89e2-709c-a9b1-d861bdd073d2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_019fcd6b-89e2-7de4-af78-8575e66a42e6" 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_019fcd6b-89e2-7ad5-9df1-5c27cc725ab8" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_019fcd6b-89e2-7de4-af78-8575e66a42e6" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://voyager.com/role/NETSALESScheduleofGeographicLocationofCustomersDetails" xlink:type="simple" xlink:href="voyg-20260930.xsd#NETSALESScheduleofGeographicLocationofCustomersDetails"/>
  <link:definitionLink xlink:role="http://voyager.com/role/NETSALESScheduleofGeographicLocationofCustomersDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentReportingInformationLineItems_019fcd6b-89e2-7854-a883-dd291de9a654" 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_019fcd6b-89e2-70f0-9574-8543c2ae9da1" 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_019fcd6b-89e2-7854-a883-dd291de9a654" xlink:to="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_019fcd6b-89e2-70f0-9574-8543c2ae9da1" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_StatementGeographicalAxis_019fcd6b-89e2-7d8a-9c25-28e07cf28a27" 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_ScheduleOfSegmentReportingInformationBySegmentTable_019fcd6b-89e2-70f0-9574-8543c2ae9da1" xlink:to="loc_srt_StatementGeographicalAxis_019fcd6b-89e2-7d8a-9c25-28e07cf28a27" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_019fcd6b-89e2-7d8a-9c25-28e07cf28a27_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_019fcd6b-89e2-7d8a-9c25-28e07cf28a27" xlink:to="loc_srt_SegmentGeographicalDomain_019fcd6b-89e2-7d8a-9c25-28e07cf28a27_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_019fcd6b-89e2-75e7-80a7-ffefcad890fb" 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_019fcd6b-89e2-7d8a-9c25-28e07cf28a27" xlink:to="loc_srt_SegmentGeographicalDomain_019fcd6b-89e2-75e7-80a7-ffefcad890fb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_US_019fcd6b-89e2-78e3-81ca-d8a3f71d32a0" 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_019fcd6b-89e2-75e7-80a7-ffefcad890fb" xlink:to="loc_country_US_019fcd6b-89e2-78e3-81ca-d8a3f71d32a0" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NonUsMember_019fcd6b-89e2-74cc-b91d-e9b186853417" 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_019fcd6b-89e2-75e7-80a7-ffefcad890fb" xlink:to="loc_us-gaap_NonUsMember_019fcd6b-89e2-74cc-b91d-e9b186853417" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_019fcd6b-89e2-713b-8fdd-716fcf375db7" 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_019fcd6b-89e2-7854-a883-dd291de9a654" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_019fcd6b-89e2-713b-8fdd-716fcf375db7" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://voyager.com/role/NETSALESNarrativeDetails" xlink:type="simple" xlink:href="voyg-20260930.xsd#NETSALESNarrativeDetails"/>
  <link:definitionLink xlink:role="http://voyager.com/role/NETSALESNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentReportingInformationLineItems_019fcd6b-89e2-76bd-8efb-c2a79c85d68f" 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_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTable_019fcd6b-89e2-7e56-8edd-fd9da4e72f3c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019fcd6b-89e2-76bd-8efb-c2a79c85d68f" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTable_019fcd6b-89e2-7e56-8edd-fd9da4e72f3c" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionStartDateAxis_019fcd6b-89e2-7d1f-890a-91ad80837b81" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionStartDateAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTable_019fcd6b-89e2-7e56-8edd-fd9da4e72f3c" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionStartDateAxis_019fcd6b-89e2-7d1f-890a-91ad80837b81" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GovernmentAssistanceAmountCumulative_019fcd6b-89e2-78cb-bb7d-0464a2b69438" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_GovernmentAssistanceAmountCumulative"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019fcd6b-89e2-76bd-8efb-c2a79c85d68f" xlink:to="loc_us-gaap_GovernmentAssistanceAmountCumulative_019fcd6b-89e2-78cb-bb7d-0464a2b69438" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerLiabilityRevenueRecognized_01a041dc-853d-7c57-af7b-94fc2b4e3185" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ContractWithCustomerLiabilityRevenueRecognized"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019fcd6b-89e2-76bd-8efb-c2a79c85d68f" xlink:to="loc_us-gaap_ContractWithCustomerLiabilityRevenueRecognized_01a041dc-853d-7c57-af7b-94fc2b4e3185" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligation_019fcd6b-89e2-790d-8596-568dd90a8ae3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RevenueRemainingPerformanceObligation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019fcd6b-89e2-76bd-8efb-c2a79c85d68f" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligation_019fcd6b-89e2-790d-8596-568dd90a8ae3" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1_019fcd6b-89e2-7e37-9c0e-e51a87ec1f3d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019fcd6b-89e2-76bd-8efb-c2a79c85d68f" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1_019fcd6b-89e2-7e37-9c0e-e51a87ec1f3d" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://voyager.com/role/NETSALESNarrativeDetails_1" xlink:type="simple" xlink:href="voyg-20260930.xsd#NETSALESNarrativeDetails_1"/>
  <link:definitionLink xlink:role="http://voyager.com/role/NETSALESNarrativeDetails_1" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentReportingInformationLineItems_019fcd6b-89e2-76bd-8efb-c2a79c85d68f" 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_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTable_019fcd6b-89e2-7e56-8edd-fd9da4e72f3c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019fcd6b-89e2-76bd-8efb-c2a79c85d68f" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTable_019fcd6b-89e2-7e56-8edd-fd9da4e72f3c" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GovernmentAssistanceAmountCumulative_019fcd6b-89e2-78cb-bb7d-0464a2b69438" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_GovernmentAssistanceAmountCumulative"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019fcd6b-89e2-76bd-8efb-c2a79c85d68f" xlink:to="loc_us-gaap_GovernmentAssistanceAmountCumulative_019fcd6b-89e2-78cb-bb7d-0464a2b69438" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerLiabilityRevenueRecognized_01a041dc-853d-7c57-af7b-94fc2b4e3185" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ContractWithCustomerLiabilityRevenueRecognized"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019fcd6b-89e2-76bd-8efb-c2a79c85d68f" xlink:to="loc_us-gaap_ContractWithCustomerLiabilityRevenueRecognized_01a041dc-853d-7c57-af7b-94fc2b4e3185" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligation_019fcd6b-89e2-790d-8596-568dd90a8ae3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RevenueRemainingPerformanceObligation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019fcd6b-89e2-76bd-8efb-c2a79c85d68f" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligation_019fcd6b-89e2-790d-8596-568dd90a8ae3" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1_019fcd6b-89e2-7e37-9c0e-e51a87ec1f3d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019fcd6b-89e2-76bd-8efb-c2a79c85d68f" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1_019fcd6b-89e2-7e37-9c0e-e51a87ec1f3d" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://voyager.com/role/NETSALESScheduleofFavorableUnfavorableNetEACAdjustmentsDetails" xlink:type="simple" xlink:href="voyg-20260930.xsd#NETSALESScheduleofFavorableUnfavorableNetEACAdjustmentsDetails"/>
  <link:definitionLink xlink:role="http://voyager.com/role/NETSALESScheduleofFavorableUnfavorableNetEACAdjustmentsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentReportingInformationLineItems_019fcd6b-89e2-7935-9fc5-435523e12e19" 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_019fcd6b-89e2-716e-af0d-62a6e5eb025f" 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_019fcd6b-89e2-7935-9fc5-435523e12e19" xlink:to="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_019fcd6b-89e2-716e-af0d-62a6e5eb025f" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RestatementAxis_019fcd6b-89e2-7f57-a24d-10d38066270b" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RestatementAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_019fcd6b-89e2-716e-af0d-62a6e5eb025f" xlink:to="loc_srt_RestatementAxis_019fcd6b-89e2-7f57-a24d-10d38066270b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RestatementDomain_019fcd6b-89e2-7f57-a24d-10d38066270b_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RestatementDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RestatementAxis_019fcd6b-89e2-7f57-a24d-10d38066270b" xlink:to="loc_srt_RestatementDomain_019fcd6b-89e2-7f57-a24d-10d38066270b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RestatementDomain_019fcd6b-89e2-7ebb-b04d-862a2be119d6" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RestatementDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RestatementAxis_019fcd6b-89e2-7f57-a24d-10d38066270b" xlink:to="loc_srt_RestatementDomain_019fcd6b-89e2-7ebb-b04d-862a2be119d6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RestatementAdjustmentMember_019fcd6b-89e2-7849-9787-34e0a3cccf2d" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RestatementAdjustmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RestatementDomain_019fcd6b-89e2-7ebb-b04d-862a2be119d6" xlink:to="loc_srt_RestatementAdjustmentMember_019fcd6b-89e2-7849-9787-34e0a3cccf2d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_voyg_EstimatesAtCompletionAdjustmentToGrossProfit_019fcd6b-89e2-7edf-b42b-dba74578b23e" xlink:href="voyg-20260930.xsd#voyg_EstimatesAtCompletionAdjustmentToGrossProfit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019fcd6b-89e2-7935-9fc5-435523e12e19" xlink:to="loc_voyg_EstimatesAtCompletionAdjustmentToGrossProfit_019fcd6b-89e2-7edf-b42b-dba74578b23e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_019fcd6b-89e2-7fbe-a025-bcd79b13d9a9" 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_019fcd6b-89e2-7935-9fc5-435523e12e19" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_019fcd6b-89e2-7fbe-a025-bcd79b13d9a9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EarningsPerShareBasic_019fcd6b-89e2-76c8-99b1-d99fc1d9cdb8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EarningsPerShareBasic"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019fcd6b-89e2-7935-9fc5-435523e12e19" xlink:to="loc_us-gaap_EarningsPerShareBasic_019fcd6b-89e2-76c8-99b1-d99fc1d9cdb8" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EarningsPerShareDiluted_019fcd6b-89e2-79eb-9748-d25d2205027a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EarningsPerShareDiluted"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019fcd6b-89e2-7935-9fc5-435523e12e19" xlink:to="loc_us-gaap_EarningsPerShareDiluted_019fcd6b-89e2-79eb-9748-d25d2205027a" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://voyager.com/role/SEGMENTREPORTINGScheduleofOperatingPerformanceDetails" xlink:type="simple" xlink:href="voyg-20260930.xsd#SEGMENTREPORTINGScheduleofOperatingPerformanceDetails"/>
  <link:definitionLink xlink:role="http://voyager.com/role/SEGMENTREPORTINGScheduleofOperatingPerformanceDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentReportingInformationLineItems_019fcd6b-89e2-730f-bbe7-04e06259e257" 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_019fcd6b-89e2-7177-b3a1-9ce874aa4202" 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_019fcd6b-89e2-730f-bbe7-04e06259e257" xlink:to="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_019fcd6b-89e2-7177-b3a1-9ce874aa4202" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsAxis_019fcd6b-89e2-75f1-80e7-35c2a9479cd7" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ConsolidationItemsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_019fcd6b-89e2-7177-b3a1-9ce874aa4202" xlink:to="loc_srt_ConsolidationItemsAxis_019fcd6b-89e2-75f1-80e7-35c2a9479cd7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_019fcd6b-89e2-75f1-80e7-35c2a9479cd7_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidationItemsAxis_019fcd6b-89e2-75f1-80e7-35c2a9479cd7" xlink:to="loc_srt_ConsolidationItemsDomain_019fcd6b-89e2-75f1-80e7-35c2a9479cd7_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_019fcd6b-89e2-71fc-bc33-6a271d3367d0" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidationItemsAxis_019fcd6b-89e2-75f1-80e7-35c2a9479cd7" xlink:to="loc_srt_ConsolidationItemsDomain_019fcd6b-89e2-71fc-bc33-6a271d3367d0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingSegmentsMember_019fcd6b-89e2-7fab-8bdb-e31388bc2902" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingSegmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_019fcd6b-89e2-71fc-bc33-6a271d3367d0" xlink:to="loc_us-gaap_OperatingSegmentsMember_019fcd6b-89e2-7fab-8bdb-e31388bc2902" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IntersegmentEliminationMember_019fcd6b-89e2-790a-9a8e-b922ec9a6d97" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IntersegmentEliminationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_019fcd6b-89e2-71fc-bc33-6a271d3367d0" xlink:to="loc_us-gaap_IntersegmentEliminationMember_019fcd6b-89e2-790a-9a8e-b922ec9a6d97" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CorporateNonSegmentMember_019fcd6b-89e2-765c-ae04-f30592cdd5c1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CorporateNonSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_019fcd6b-89e2-71fc-bc33-6a271d3367d0" xlink:to="loc_us-gaap_CorporateNonSegmentMember_019fcd6b-89e2-765c-ae04-f30592cdd5c1" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_019fcd6b-89e2-7fff-800e-fcb5169f004d" 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_019fcd6b-89e2-7177-b3a1-9ce874aa4202" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_019fcd6b-89e2-7fff-800e-fcb5169f004d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_019fcd6b-89e2-7fff-800e-fcb5169f004d_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_019fcd6b-89e2-7fff-800e-fcb5169f004d" xlink:to="loc_us-gaap_SegmentDomain_019fcd6b-89e2-7fff-800e-fcb5169f004d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_019fcd6b-89e2-72c0-97e0-957a02d5555d" 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_019fcd6b-89e2-7fff-800e-fcb5169f004d" xlink:to="loc_us-gaap_SegmentDomain_019fcd6b-89e2-72c0-97e0-957a02d5555d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_voyg_DefenseAndSpaceTechnologiesMember_019fcd6b-89e2-7221-a374-d024d6fca636" xlink:href="voyg-20260930.xsd#voyg_DefenseAndSpaceTechnologiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019fcd6b-89e2-72c0-97e0-957a02d5555d" xlink:to="loc_voyg_DefenseAndSpaceTechnologiesMember_019fcd6b-89e2-7221-a374-d024d6fca636" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_voyg_StarlabSpaceStationsMember_019fcd6b-89e2-78d1-a8a0-2f4297a40baa" xlink:href="voyg-20260930.xsd#voyg_StarlabSpaceStationsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019fcd6b-89e2-72c0-97e0-957a02d5555d" xlink:to="loc_voyg_StarlabSpaceStationsMember_019fcd6b-89e2-78d1-a8a0-2f4297a40baa" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CorporateAndOtherMember_019fcd6b-89e2-77dc-9a1e-ee816b1d7bd6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CorporateAndOtherMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019fcd6b-89e2-72c0-97e0-957a02d5555d" xlink:to="loc_us-gaap_CorporateAndOtherMember_019fcd6b-89e2-77dc-9a1e-ee816b1d7bd6" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_019fcd6b-89e2-7cd2-8d54-1045341b8c9f" 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_019fcd6b-89e2-730f-bbe7-04e06259e257" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_019fcd6b-89e2-7cd2-8d54-1045341b8c9f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherExpenses_019fcd6b-89e2-7abe-94f3-c1d9e3160022" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherExpenses"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019fcd6b-89e2-730f-bbe7-04e06259e257" xlink:to="loc_us-gaap_OtherExpenses_019fcd6b-89e2-7abe-94f3-c1d9e3160022" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_voyg_EarningsBeforeInterestTaxDepreciationAndAmortization_019fcd6b-89e2-7ac7-89fa-8a94936ec3a7" xlink:href="voyg-20260930.xsd#voyg_EarningsBeforeInterestTaxDepreciationAndAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019fcd6b-89e2-730f-bbe7-04e06259e257" xlink:to="loc_voyg_EarningsBeforeInterestTaxDepreciationAndAmortization_019fcd6b-89e2-7ac7-89fa-8a94936ec3a7" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostOfGoodsAndServicesSoldDepreciationAndAmortization_019fcd6b-89e2-7a9e-b0b8-61af0309c980" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CostOfGoodsAndServicesSoldDepreciationAndAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019fcd6b-89e2-730f-bbe7-04e06259e257" xlink:to="loc_us-gaap_CostOfGoodsAndServicesSoldDepreciationAndAmortization_019fcd6b-89e2-7a9e-b0b8-61af0309c980" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllocatedShareBasedCompensationExpense_019fcd6b-89e2-7e90-a12a-2d7a538eff24" 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_019fcd6b-89e2-730f-bbe7-04e06259e257" xlink:to="loc_us-gaap_AllocatedShareBasedCompensationExpense_019fcd6b-89e2-7e90-a12a-2d7a538eff24" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestExpenseNonoperating_019fcd6b-89e2-7bc8-b7c8-90dd91abfb6a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InterestExpenseNonoperating"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019fcd6b-89e2-730f-bbe7-04e06259e257" xlink:to="loc_us-gaap_InterestExpenseNonoperating_019fcd6b-89e2-7bc8-b7c8-90dd91abfb6a" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLossAttributableToNoncontrollingInterest_019fcd6b-89e2-79e7-b0ea-7622bf9ffcd4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetIncomeLossAttributableToNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019fcd6b-89e2-730f-bbe7-04e06259e257" xlink:to="loc_us-gaap_NetIncomeLossAttributableToNoncontrollingInterest_019fcd6b-89e2-79e7-b0ea-7622bf9ffcd4" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentIncomeInterest_019fcd6b-89e2-7f86-9394-ab125edab62b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InvestmentIncomeInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019fcd6b-89e2-730f-bbe7-04e06259e257" xlink:to="loc_us-gaap_InvestmentIncomeInterest_019fcd6b-89e2-7f86-9394-ab125edab62b" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentReportingOtherItemAmount_019fcd6b-89e2-7401-b8cd-63ae32a2ac63" 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_019fcd6b-89e2-730f-bbe7-04e06259e257" xlink:to="loc_us-gaap_SegmentReportingOtherItemAmount_019fcd6b-89e2-7401-b8cd-63ae32a2ac63" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossAttributableToNoncontrollingInterest_019fcd6b-89e2-7089-9139-5e29c4e893cc" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeLossAttributableToNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019fcd6b-89e2-730f-bbe7-04e06259e257" xlink:to="loc_us-gaap_IncomeLossAttributableToNoncontrollingInterest_019fcd6b-89e2-7089-9139-5e29c4e893cc" xlink:type="arc" order="9"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://voyager.com/role/SEGMENTREPORTINGScheduleofCapitalExpendituresDetails" xlink:type="simple" xlink:href="voyg-20260930.xsd#SEGMENTREPORTINGScheduleofCapitalExpendituresDetails"/>
  <link:definitionLink xlink:role="http://voyager.com/role/SEGMENTREPORTINGScheduleofCapitalExpendituresDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentReportingInformationLineItems_019fcd6b-89e2-71c6-b8cc-532386527ecd" 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_019fcd6b-89e2-799e-b687-961f67a7853d" 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_019fcd6b-89e2-71c6-b8cc-532386527ecd" xlink:to="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_019fcd6b-89e2-799e-b687-961f67a7853d" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsAxis_019fcd6b-89e2-7d34-9f50-eeadcb900089" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ConsolidationItemsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_019fcd6b-89e2-799e-b687-961f67a7853d" xlink:to="loc_srt_ConsolidationItemsAxis_019fcd6b-89e2-7d34-9f50-eeadcb900089" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_019fcd6b-89e2-7d34-9f50-eeadcb900089_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidationItemsAxis_019fcd6b-89e2-7d34-9f50-eeadcb900089" xlink:to="loc_srt_ConsolidationItemsDomain_019fcd6b-89e2-7d34-9f50-eeadcb900089_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_019fcd6b-89e2-790d-a402-c06e52f810ac" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidationItemsAxis_019fcd6b-89e2-7d34-9f50-eeadcb900089" xlink:to="loc_srt_ConsolidationItemsDomain_019fcd6b-89e2-790d-a402-c06e52f810ac" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingSegmentsMember_019fcd6b-89e2-743c-84a6-e2abc811a84e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingSegmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_019fcd6b-89e2-790d-a402-c06e52f810ac" xlink:to="loc_us-gaap_OperatingSegmentsMember_019fcd6b-89e2-743c-84a6-e2abc811a84e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CorporateNonSegmentMember_019fcd6b-89e2-7029-806a-dbb746a3d377" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CorporateNonSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_019fcd6b-89e2-790d-a402-c06e52f810ac" xlink:to="loc_us-gaap_CorporateNonSegmentMember_019fcd6b-89e2-7029-806a-dbb746a3d377" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_019fcd6b-89e2-7650-b1d3-1d926c4bee4f" 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_019fcd6b-89e2-799e-b687-961f67a7853d" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_019fcd6b-89e2-7650-b1d3-1d926c4bee4f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_019fcd6b-89e2-7650-b1d3-1d926c4bee4f_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_019fcd6b-89e2-7650-b1d3-1d926c4bee4f" xlink:to="loc_us-gaap_SegmentDomain_019fcd6b-89e2-7650-b1d3-1d926c4bee4f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_019fcd6b-89e2-7f08-9dbb-f72f2d04e674" 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_019fcd6b-89e2-7650-b1d3-1d926c4bee4f" xlink:to="loc_us-gaap_SegmentDomain_019fcd6b-89e2-7f08-9dbb-f72f2d04e674" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_voyg_DefenseAndSpaceTechnologiesMember_019fcd6b-89e2-76da-9af6-11fe6b098793" xlink:href="voyg-20260930.xsd#voyg_DefenseAndSpaceTechnologiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019fcd6b-89e2-7f08-9dbb-f72f2d04e674" xlink:to="loc_voyg_DefenseAndSpaceTechnologiesMember_019fcd6b-89e2-76da-9af6-11fe6b098793" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_voyg_StarlabSpaceStationsMember_019fcd6b-89e2-7e00-aeda-7a2e5b1e8117" xlink:href="voyg-20260930.xsd#voyg_StarlabSpaceStationsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019fcd6b-89e2-7f08-9dbb-f72f2d04e674" xlink:to="loc_voyg_StarlabSpaceStationsMember_019fcd6b-89e2-7e00-aeda-7a2e5b1e8117" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentExpenditureAdditionToLongLivedAssets_019fcd6b-89e2-7a5b-853f-e93f875fc3eb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SegmentExpenditureAdditionToLongLivedAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019fcd6b-89e2-71c6-b8cc-532386527ecd" xlink:to="loc_us-gaap_SegmentExpenditureAdditionToLongLivedAssets_019fcd6b-89e2-7a5b-853f-e93f875fc3eb" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://voyager.com/role/NETLOSSPERCOMMONSHAREScheduleofComputationofDilutedNetLossPerShareDetails" xlink:type="simple" xlink:href="voyg-20260930.xsd#NETLOSSPERCOMMONSHAREScheduleofComputationofDilutedNetLossPerShareDetails"/>
  <link:definitionLink xlink:role="http://voyager.com/role/NETLOSSPERCOMMONSHAREScheduleofComputationofDilutedNetLossPerShareDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_019fcd6b-89e2-7a89-a3ad-43ab0e9e6022" 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_019fcd6b-89e2-7467-9628-821be413fec0" 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_019fcd6b-89e2-7a89-a3ad-43ab0e9e6022" xlink:to="loc_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_019fcd6b-89e2-7467-9628-821be413fec0" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_019fcd6b-89e2-7a0a-b402-c9bda6819561" 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_019fcd6b-89e2-7467-9628-821be413fec0" xlink:to="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_019fcd6b-89e2-7a0a-b402-c9bda6819561" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesNameDomain_019fcd6b-89e2-7a0a-b402-c9bda6819561_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_019fcd6b-89e2-7a0a-b402-c9bda6819561" xlink:to="loc_us-gaap_AntidilutiveSecuritiesNameDomain_019fcd6b-89e2-7a0a-b402-c9bda6819561_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesNameDomain_019fcd6b-89e2-7d07-bbfa-e4f7f518e55d" 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_019fcd6b-89e2-7a0a-b402-c9bda6819561" xlink:to="loc_us-gaap_AntidilutiveSecuritiesNameDomain_019fcd6b-89e2-7d07-bbfa-e4f7f518e55d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeStockOptionMember_019fcd6b-89e2-783f-8ba3-5750279412dd" 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_019fcd6b-89e2-7d07-bbfa-e4f7f518e55d" xlink:to="loc_us-gaap_EmployeeStockOptionMember_019fcd6b-89e2-783f-8ba3-5750279412dd" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WarrantMember_019fcd6b-89e2-7ab7-bd56-e1beaa440d8b" 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_019fcd6b-89e2-7d07-bbfa-e4f7f518e55d" xlink:to="loc_us-gaap_WarrantMember_019fcd6b-89e2-7ab7-bd56-e1beaa440d8b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_019fcd6b-89e2-7d89-bdaa-48fa1d497fcf" 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_019fcd6b-89e2-7a89-a3ad-43ab0e9e6022" xlink:to="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_019fcd6b-89e2-7d89-bdaa-48fa1d497fcf" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://voyager.com/role/JOINTVENTURENarrativeDetails" xlink:type="simple" xlink:href="voyg-20260930.xsd#JOINTVENTURENarrativeDetails"/>
  <link:definitionLink xlink:role="http://voyager.com/role/JOINTVENTURENarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_019fcd6b-89e2-7600-95f7-49b67ca5f695" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfEquityMethodInvestmentsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfEquityMethodInvestmentsTable_019fcd6b-89e2-7f92-a985-d7502ed97f86" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfEquityMethodInvestmentsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_019fcd6b-89e2-7600-95f7-49b67ca5f695" xlink:to="loc_us-gaap_ScheduleOfEquityMethodInvestmentsTable_019fcd6b-89e2-7f92-a985-d7502ed97f86" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_019fcd6b-89e2-7bfa-a6eb-b76d5e5913c8" 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_ScheduleOfEquityMethodInvestmentsTable_019fcd6b-89e2-7f92-a985-d7502ed97f86" xlink:to="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_019fcd6b-89e2-7bfa-a6eb-b76d5e5913c8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_EquityMethodInvesteeNameDomain_019fcd6b-89e2-7bfa-a6eb-b76d5e5913c8_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_019fcd6b-89e2-7bfa-a6eb-b76d5e5913c8" xlink:to="loc_srt_EquityMethodInvesteeNameDomain_019fcd6b-89e2-7bfa-a6eb-b76d5e5913c8_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_EquityMethodInvesteeNameDomain_019fcd6b-89e2-7e48-8d64-7bbf60df5b4a" 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_019fcd6b-89e2-7bfa-a6eb-b76d5e5913c8" xlink:to="loc_srt_EquityMethodInvesteeNameDomain_019fcd6b-89e2-7e48-8d64-7bbf60df5b4a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_voyg_StarlabJVMember_019fcd6b-89e2-7c06-89f0-d966e7a1930c" xlink:href="voyg-20260930.xsd#voyg_StarlabJVMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_EquityMethodInvesteeNameDomain_019fcd6b-89e2-7e48-8d64-7bbf60df5b4a" xlink:to="loc_voyg_StarlabJVMember_019fcd6b-89e2-7c06-89f0-d966e7a1930c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_OwnershipAxis_019fcd6b-89e2-773f-86c4-a1894a5ec78b" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_OwnershipAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsTable_019fcd6b-89e2-7f92-a985-d7502ed97f86" xlink:to="loc_srt_OwnershipAxis_019fcd6b-89e2-773f-86c4-a1894a5ec78b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_OwnershipDomain_019fcd6b-89e2-773f-86c4-a1894a5ec78b_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_OwnershipDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_OwnershipAxis_019fcd6b-89e2-773f-86c4-a1894a5ec78b" xlink:to="loc_srt_OwnershipDomain_019fcd6b-89e2-773f-86c4-a1894a5ec78b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_OwnershipDomain_019fcd6b-89e2-711a-b1e2-2ecc9ce9adb1" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_OwnershipDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_OwnershipAxis_019fcd6b-89e2-773f-86c4-a1894a5ec78b" xlink:to="loc_srt_OwnershipDomain_019fcd6b-89e2-711a-b1e2-2ecc9ce9adb1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_voyg_StarlabJVMember_019fcd6b-89e2-73ac-9731-ba50977fdb6a" xlink:href="voyg-20260930.xsd#voyg_StarlabJVMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_OwnershipDomain_019fcd6b-89e2-711a-b1e2-2ecc9ce9adb1" xlink:to="loc_voyg_StarlabJVMember_019fcd6b-89e2-73ac-9731-ba50977fdb6a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MinorityInterestOwnershipPercentageByParent_019fcd6b-89e2-7276-b089-1135299e2852" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_MinorityInterestOwnershipPercentageByParent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_019fcd6b-89e2-7600-95f7-49b67ca5f695" xlink:to="loc_us-gaap_MinorityInterestOwnershipPercentageByParent_019fcd6b-89e2-7276-b089-1135299e2852" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_voyg_NumberOfBoardOfDirectorSeatsControlledByCompany_019fcd6b-89e2-7061-91e5-f240183936c2" xlink:href="voyg-20260930.xsd#voyg_NumberOfBoardOfDirectorSeatsControlledByCompany"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_019fcd6b-89e2-7600-95f7-49b67ca5f695" xlink:to="loc_voyg_NumberOfBoardOfDirectorSeatsControlledByCompany_019fcd6b-89e2-7061-91e5-f240183936c2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_voyg_NumberOfBoardOfDirectorSeats_019fcd6b-89e2-7e48-b4f2-772a7258822b" xlink:href="voyg-20260930.xsd#voyg_NumberOfBoardOfDirectorSeats"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_019fcd6b-89e2-7600-95f7-49b67ca5f695" xlink:to="loc_voyg_NumberOfBoardOfDirectorSeats_019fcd6b-89e2-7e48-b4f2-772a7258822b" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://voyager.com/role/JOINTVENTUREScheduleofVariableInterestEntitiesDetails" xlink:type="simple" xlink:href="voyg-20260930.xsd#JOINTVENTUREScheduleofVariableInterestEntitiesDetails"/>
  <link:definitionLink xlink:role="http://voyager.com/role/JOINTVENTUREScheduleofVariableInterestEntitiesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_019fcd6b-89e2-7a2e-83d8-4263a5a5c346" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfEquityMethodInvestmentsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfEquityMethodInvestmentsTable_019fcd6b-89e2-7d63-809b-d81d6397d805" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfEquityMethodInvestmentsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_019fcd6b-89e2-7a2e-83d8-4263a5a5c346" xlink:to="loc_us-gaap_ScheduleOfEquityMethodInvestmentsTable_019fcd6b-89e2-7d63-809b-d81d6397d805" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesAxis_019fcd6b-89e2-7974-8da8-c851c088d459" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ConsolidatedEntitiesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsTable_019fcd6b-89e2-7d63-809b-d81d6397d805" xlink:to="loc_srt_ConsolidatedEntitiesAxis_019fcd6b-89e2-7974-8da8-c851c088d459" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesDomain_019fcd6b-89e2-7974-8da8-c851c088d459_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ConsolidatedEntitiesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidatedEntitiesAxis_019fcd6b-89e2-7974-8da8-c851c088d459" xlink:to="loc_srt_ConsolidatedEntitiesDomain_019fcd6b-89e2-7974-8da8-c851c088d459_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesDomain_019fcd6b-89e2-77a6-b0da-f0f02544bab3" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ConsolidatedEntitiesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidatedEntitiesAxis_019fcd6b-89e2-7974-8da8-c851c088d459" xlink:to="loc_srt_ConsolidatedEntitiesDomain_019fcd6b-89e2-77a6-b0da-f0f02544bab3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableInterestEntityPrimaryBeneficiaryMember_019fcd6b-89e2-7336-b0b0-30ebdc4354dc" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_VariableInterestEntityPrimaryBeneficiaryMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidatedEntitiesDomain_019fcd6b-89e2-77a6-b0da-f0f02544bab3" xlink:to="loc_us-gaap_VariableInterestEntityPrimaryBeneficiaryMember_019fcd6b-89e2-7336-b0b0-30ebdc4354dc" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019fcd6b-89e2-7f1b-a2f5-cfbf409efa92" 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_ScheduleOfEquityMethodInvestmentsTable_019fcd6b-89e2-7d63-809b-d81d6397d805" xlink:to="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019fcd6b-89e2-7f1b-a2f5-cfbf409efa92" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_019fcd6b-89e2-7f1b-a2f5-cfbf409efa92_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_019fcd6b-89e2-7f1b-a2f5-cfbf409efa92" xlink:to="loc_us-gaap_RelatedPartyDomain_019fcd6b-89e2-7f1b-a2f5-cfbf409efa92_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_019fcd6b-89e2-74b4-abf1-35bfeb13af0c" 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_019fcd6b-89e2-7f1b-a2f5-cfbf409efa92" xlink:to="loc_us-gaap_RelatedPartyDomain_019fcd6b-89e2-74b4-abf1-35bfeb13af0c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyMember_019fcd6b-89e2-7e3d-81a4-bd17e43ea14f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RelatedPartyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyDomain_019fcd6b-89e2-74b4-abf1-35bfeb13af0c" xlink:to="loc_us-gaap_RelatedPartyMember_019fcd6b-89e2-7e3d-81a4-bd17e43ea14f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsAbstract_019fcd6b-89e2-7b22-8a5b-48410b753103" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AssetsAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_019fcd6b-89e2-7a2e-83d8-4263a5a5c346" xlink:to="loc_us-gaap_AssetsAbstract_019fcd6b-89e2-7b22-8a5b-48410b753103" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_019fcd6b-89e2-73ac-9413-b5a76786d07f" 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_AssetsAbstract_019fcd6b-89e2-7b22-8a5b-48410b753103" xlink:to="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_019fcd6b-89e2-73ac-9413-b5a76786d07f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsReceivableNetCurrent_019fcd6b-89e2-7b48-b777-1e7f0549276f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AccountsReceivableNetCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_019fcd6b-89e2-7b22-8a5b-48410b753103" xlink:to="loc_us-gaap_AccountsReceivableNetCurrent_019fcd6b-89e2-7b48-b777-1e7f0549276f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PrepaidExpenseAndOtherAssetsCurrent_019fcd6b-89e2-7f96-a477-0a1b634e755a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PrepaidExpenseAndOtherAssetsCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_019fcd6b-89e2-7b22-8a5b-48410b753103" xlink:to="loc_us-gaap_PrepaidExpenseAndOtherAssetsCurrent_019fcd6b-89e2-7f96-a477-0a1b634e755a" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentNet_019fcd6b-89e2-7a4a-aad5-ad04d690b52a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PropertyPlantAndEquipmentNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_019fcd6b-89e2-7b22-8a5b-48410b753103" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentNet_019fcd6b-89e2-7a4a-aad5-ad04d690b52a" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseRightOfUseAsset_019fcd6b-89e2-7e81-839c-11b8a32379a3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingLeaseRightOfUseAsset"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_019fcd6b-89e2-7b22-8a5b-48410b753103" xlink:to="loc_us-gaap_OperatingLeaseRightOfUseAsset_019fcd6b-89e2-7e81-839c-11b8a32379a3" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAssetsNoncurrent_019fcd6b-89e2-7688-9125-3b8cd1b5cd70" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherAssetsNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_019fcd6b-89e2-7b22-8a5b-48410b753103" xlink:to="loc_us-gaap_OtherAssetsNoncurrent_019fcd6b-89e2-7688-9125-3b8cd1b5cd70" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Assets_019fcd6b-89e2-72ca-99b0-d75af4428ea2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_Assets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_019fcd6b-89e2-7b22-8a5b-48410b753103" xlink:to="loc_us-gaap_Assets_019fcd6b-89e2-72ca-99b0-d75af4428ea2" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesCurrentAbstract_019fcd6b-89e2-7784-96e0-49eca22ac7dd" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LiabilitiesCurrentAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_019fcd6b-89e2-7a2e-83d8-4263a5a5c346" xlink:to="loc_us-gaap_LiabilitiesCurrentAbstract_019fcd6b-89e2-7784-96e0-49eca22ac7dd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsPayableCurrent_019fcd6b-89e2-70ab-8644-f76d63960af7" 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_LiabilitiesCurrentAbstract_019fcd6b-89e2-7784-96e0-49eca22ac7dd" xlink:to="loc_us-gaap_AccountsPayableCurrent_019fcd6b-89e2-70ab-8644-f76d63960af7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiabilityCurrent_019fcd6b-89e2-71e8-93b5-d2d6928e145f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingLeaseLiabilityCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_019fcd6b-89e2-7784-96e0-49eca22ac7dd" xlink:to="loc_us-gaap_OperatingLeaseLiabilityCurrent_019fcd6b-89e2-71e8-93b5-d2d6928e145f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccruedLiabilitiesCurrent_019fcd6b-89e2-7bb8-a6c8-056bffb15ecc" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AccruedLiabilitiesCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_019fcd6b-89e2-7784-96e0-49eca22ac7dd" xlink:to="loc_us-gaap_AccruedLiabilitiesCurrent_019fcd6b-89e2-7bb8-a6c8-056bffb15ecc" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerLiabilityNoncurrent_019fcd6b-89e2-7e5f-9063-11bcfa8a1fc8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ContractWithCustomerLiabilityNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_019fcd6b-89e2-7784-96e0-49eca22ac7dd" xlink:to="loc_us-gaap_ContractWithCustomerLiabilityNoncurrent_019fcd6b-89e2-7e5f-9063-11bcfa8a1fc8" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Liabilities_019fcd6b-89e2-72ad-9c11-898be869ec85" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_Liabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_019fcd6b-89e2-7784-96e0-49eca22ac7dd" xlink:to="loc_us-gaap_Liabilities_019fcd6b-89e2-72ad-9c11-898be869ec85" xlink:type="arc" order="5"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://voyager.com/role/COMMITMENTSANDCONTINGENCIESDetails" xlink:type="simple" xlink:href="voyg-20260930.xsd#COMMITMENTSANDCONTINGENCIESDetails"/>
  <link:definitionLink xlink:role="http://voyager.com/role/COMMITMENTSANDCONTINGENCIESDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherCommitmentsLineItems_019fcd6b-89e2-7a3b-a62e-613766b5ca23" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherCommitmentsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherCommitmentsTable_019fcd6b-89e2-702a-a08f-0b4a92c051ad" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherCommitmentsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_OtherCommitmentsLineItems_019fcd6b-89e2-7a3b-a62e-613766b5ca23" xlink:to="loc_us-gaap_OtherCommitmentsTable_019fcd6b-89e2-702a-a08f-0b4a92c051ad" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherCommitmentsAxis_019fcd6b-89e2-7e67-8f48-cd154aa56170" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherCommitmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_OtherCommitmentsTable_019fcd6b-89e2-702a-a08f-0b4a92c051ad" xlink:to="loc_us-gaap_OtherCommitmentsAxis_019fcd6b-89e2-7e67-8f48-cd154aa56170" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherCommitmentsDomain_019fcd6b-89e2-7e67-8f48-cd154aa56170_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherCommitmentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_OtherCommitmentsAxis_019fcd6b-89e2-7e67-8f48-cd154aa56170" xlink:to="loc_us-gaap_OtherCommitmentsDomain_019fcd6b-89e2-7e67-8f48-cd154aa56170_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherCommitmentsDomain_019fcd6b-89e2-7e05-a8c6-b7377f5ea4a7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherCommitmentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_OtherCommitmentsAxis_019fcd6b-89e2-7e67-8f48-cd154aa56170" xlink:to="loc_us-gaap_OtherCommitmentsDomain_019fcd6b-89e2-7e05-a8c6-b7377f5ea4a7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_voyg_NonCancelableServiceContractCommitmentsMember_019fcd6b-89e2-7a9c-a609-2f1187282b6b" xlink:href="voyg-20260930.xsd#voyg_NonCancelableServiceContractCommitmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherCommitmentsDomain_019fcd6b-89e2-7e05-a8c6-b7377f5ea4a7" xlink:to="loc_voyg_NonCancelableServiceContractCommitmentsMember_019fcd6b-89e2-7a9c-a609-2f1187282b6b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractualObligation_019fcd6b-89e2-7851-88eb-b8761435564f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ContractualObligation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherCommitmentsLineItems_019fcd6b-89e2-7a3b-a62e-613766b5ca23" xlink:to="loc_us-gaap_ContractualObligation_019fcd6b-89e2-7851-88eb-b8761435564f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_voyg_ContractualObligationCancellationFeePercentage_019fcd6b-89e2-7053-8dd9-6dc9ce332a64" xlink:href="voyg-20260930.xsd#voyg_ContractualObligationCancellationFeePercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherCommitmentsLineItems_019fcd6b-89e2-7a3b-a62e-613766b5ca23" xlink:to="loc_voyg_ContractualObligationCancellationFeePercentage_019fcd6b-89e2-7053-8dd9-6dc9ce332a64" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LossContingencyEstimateOfPossibleLoss_019fcd6b-89e2-7518-b93c-3f481ac6d088" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LossContingencyEstimateOfPossibleLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherCommitmentsLineItems_019fcd6b-89e2-7a3b-a62e-613766b5ca23" xlink:to="loc_us-gaap_LossContingencyEstimateOfPossibleLoss_019fcd6b-89e2-7518-b93c-3f481ac6d088" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PurchaseCommitmentRemainingMinimumAmountCommitted_019fcd6b-89e2-7c60-9092-6f1136f905f2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PurchaseCommitmentRemainingMinimumAmountCommitted"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherCommitmentsLineItems_019fcd6b-89e2-7a3b-a62e-613766b5ca23" xlink:to="loc_us-gaap_PurchaseCommitmentRemainingMinimumAmountCommitted_019fcd6b-89e2-7c60-9092-6f1136f905f2" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://voyager.com/role/SUPPLEMENTALCASHFLOWDetails" xlink:type="simple" xlink:href="voyg-20260930.xsd#SUPPLEMENTALCASHFLOWDetails"/>
  <link:definitionLink xlink:role="http://voyager.com/role/SUPPLEMENTALCASHFLOWDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtConversionLineItems_019fcd6b-89e2-7a75-a5bd-6961fe1eaf1e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtConversionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtConversionTable_019fcd6b-89e2-71f6-a731-e11e33842e0b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtConversionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtConversionLineItems_019fcd6b-89e2-7a75-a5bd-6961fe1eaf1e" xlink:to="loc_us-gaap_DebtConversionTable_019fcd6b-89e2-71f6-a731-e11e33842e0b" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtConversionByUniqueDescriptionAxis_019fcd6b-89e2-7bb7-874a-83b4508d71a8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtConversionByUniqueDescriptionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtConversionTable_019fcd6b-89e2-71f6-a731-e11e33842e0b" xlink:to="loc_us-gaap_DebtConversionByUniqueDescriptionAxis_019fcd6b-89e2-7bb7-874a-83b4508d71a8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtConversionNameDomain_019fcd6b-89e2-7bb7-874a-83b4508d71a8_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtConversionNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtConversionByUniqueDescriptionAxis_019fcd6b-89e2-7bb7-874a-83b4508d71a8" xlink:to="loc_us-gaap_DebtConversionNameDomain_019fcd6b-89e2-7bb7-874a-83b4508d71a8_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtConversionNameDomain_019fcd6b-89e2-7933-b0e7-f301b67b4bb6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtConversionNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtConversionByUniqueDescriptionAxis_019fcd6b-89e2-7bb7-874a-83b4508d71a8" xlink:to="loc_us-gaap_DebtConversionNameDomain_019fcd6b-89e2-7933-b0e7-f301b67b4bb6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_voyg_ConversionOfDebtToCommonStockUponInitialPublicOfferingMember_019fcd6b-89e2-76f4-b7ec-5d881a8379a4" xlink:href="voyg-20260930.xsd#voyg_ConversionOfDebtToCommonStockUponInitialPublicOfferingMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtConversionNameDomain_019fcd6b-89e2-7933-b0e7-f301b67b4bb6" xlink:to="loc_voyg_ConversionOfDebtToCommonStockUponInitialPublicOfferingMember_019fcd6b-89e2-76f4-b7ec-5d881a8379a4" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_voyg_ConversionOf2024ConvertibleNotesToCommonStockMember_019fcd6b-89e2-7fcf-bca7-53bb4c239205" xlink:href="voyg-20260930.xsd#voyg_ConversionOf2024ConvertibleNotesToCommonStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtConversionNameDomain_019fcd6b-89e2-7933-b0e7-f301b67b4bb6" xlink:to="loc_voyg_ConversionOf2024ConvertibleNotesToCommonStockMember_019fcd6b-89e2-7fcf-bca7-53bb4c239205" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_voyg_ConversionTypeOfArrangementAxis_01a04292-5cc5-7cb2-b8cb-e2deacea828b" xlink:href="voyg-20260930.xsd#voyg_ConversionTypeOfArrangementAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtConversionTable_019fcd6b-89e2-71f6-a731-e11e33842e0b" xlink:to="loc_voyg_ConversionTypeOfArrangementAxis_01a04292-5cc5-7cb2-b8cb-e2deacea828b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_voyg_TypeOfArrangementDomain_01a04292-5cc5-7cb2-b8cb-e2deacea828b_default" xlink:href="voyg-20260930.xsd#voyg_TypeOfArrangementDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_voyg_ConversionTypeOfArrangementAxis_01a04292-5cc5-7cb2-b8cb-e2deacea828b" xlink:to="loc_voyg_TypeOfArrangementDomain_01a04292-5cc5-7cb2-b8cb-e2deacea828b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_voyg_TypeOfArrangementDomain_01a04292-5cc5-785d-9279-6bd1f067f83d" xlink:href="voyg-20260930.xsd#voyg_TypeOfArrangementDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_voyg_ConversionTypeOfArrangementAxis_01a04292-5cc5-7cb2-b8cb-e2deacea828b" xlink:to="loc_voyg_TypeOfArrangementDomain_01a04292-5cc5-785d-9279-6bd1f067f83d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_voyg_ExchangeForCommonStockMember_01a04292-85c2-7a78-9bfb-1967a9c9dc39" xlink:href="voyg-20260930.xsd#voyg_ExchangeForCommonStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_voyg_TypeOfArrangementDomain_01a04292-5cc5-785d-9279-6bd1f067f83d" xlink:to="loc_voyg_ExchangeForCommonStockMember_01a04292-85c2-7a78-9bfb-1967a9c9dc39" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_voyg_ExchangeForStarlabEquityMember_01a04292-f157-7049-9e98-51af16cc3563" xlink:href="voyg-20260930.xsd#voyg_ExchangeForStarlabEquityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_voyg_TypeOfArrangementDomain_01a04292-5cc5-785d-9279-6bd1f067f83d" xlink:to="loc_voyg_ExchangeForStarlabEquityMember_01a04292-f157-7049-9e98-51af16cc3563" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestPaidNet_019fcd6b-89e2-73dc-8b38-59af60ede139" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InterestPaidNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtConversionLineItems_019fcd6b-89e2-7a75-a5bd-6961fe1eaf1e" xlink:to="loc_us-gaap_InterestPaidNet_019fcd6b-89e2-73dc-8b38-59af60ede139" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxesPaidNet_019fcd6b-89e2-7841-8036-0b0db8c260dc" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeTaxesPaidNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtConversionLineItems_019fcd6b-89e2-7a75-a5bd-6961fe1eaf1e" xlink:to="loc_us-gaap_IncomeTaxesPaidNet_019fcd6b-89e2-7841-8036-0b0db8c260dc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NoncashInvestingAndFinancingItemsAbstract_019fcd6b-89e2-7ff7-a8be-220088c3fbae" 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_DebtConversionLineItems_019fcd6b-89e2-7a75-a5bd-6961fe1eaf1e" xlink:to="loc_us-gaap_NoncashInvestingAndFinancingItemsAbstract_019fcd6b-89e2-7ff7-a8be-220088c3fbae" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssued1_019fcd6b-89e2-7427-b61d-6d3ec0066566" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockIssued1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NoncashInvestingAndFinancingItemsAbstract_019fcd6b-89e2-7ff7-a8be-220088c3fbae" xlink:to="loc_us-gaap_StockIssued1_019fcd6b-89e2-7427-b61d-6d3ec0066566" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability_019fcd6b-89e2-797b-b5ba-68b34e276c9e" 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_019fcd6b-89e2-7ff7-a8be-220088c3fbae" xlink:to="loc_us-gaap_RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability_019fcd6b-89e2-797b-b5ba-68b34e276c9e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConversionOfStockAmountIssued1_019fcd6b-89e2-73cd-a15c-d1755b7295da" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ConversionOfStockAmountIssued1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NoncashInvestingAndFinancingItemsAbstract_019fcd6b-89e2-7ff7-a8be-220088c3fbae" xlink:to="loc_us-gaap_ConversionOfStockAmountIssued1_019fcd6b-89e2-73cd-a15c-d1755b7295da" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_voyg_IssuanceOfCommonStockInConsiderationForBusinessAcquisition_019fcd6b-8a92-7ca9-88a8-4c005365be37" xlink:href="voyg-20260930.xsd#voyg_IssuanceOfCommonStockInConsiderationForBusinessAcquisition"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NoncashInvestingAndFinancingItemsAbstract_019fcd6b-89e2-7ff7-a8be-220088c3fbae" xlink:to="loc_voyg_IssuanceOfCommonStockInConsiderationForBusinessAcquisition_019fcd6b-8a92-7ca9-88a8-4c005365be37" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_voyg_IssuanceOfCommonStockForPurchaseOfNoncontrollingInterest_019fcd6b-8a92-7cc0-9d1e-d13a9932a321" xlink:href="voyg-20260930.xsd#voyg_IssuanceOfCommonStockForPurchaseOfNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NoncashInvestingAndFinancingItemsAbstract_019fcd6b-89e2-7ff7-a8be-220088c3fbae" xlink:to="loc_voyg_IssuanceOfCommonStockForPurchaseOfNoncontrollingInterest_019fcd6b-8a92-7cc0-9d1e-d13a9932a321" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtConversionConvertedInstrumentAmount1_019fcd6b-8a92-7d79-81db-2f60d8cd3f79" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtConversionConvertedInstrumentAmount1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NoncashInvestingAndFinancingItemsAbstract_019fcd6b-89e2-7ff7-a8be-220088c3fbae" xlink:to="loc_us-gaap_DebtConversionConvertedInstrumentAmount1_019fcd6b-8a92-7d79-81db-2f60d8cd3f79" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CapitalExpendituresIncurredButNotYetPaid_019fcd6b-8a92-76ed-a1ba-1653657ef889" 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_019fcd6b-89e2-7ff7-a8be-220088c3fbae" xlink:to="loc_us-gaap_CapitalExpendituresIncurredButNotYetPaid_019fcd6b-8a92-76ed-a1ba-1653657ef889" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_voyg_GovernmentAssistanceAccruedButNotReceived_019fcd6b-8a92-7875-87c6-4a2c3dc7c91d" xlink:href="voyg-20260930.xsd#voyg_GovernmentAssistanceAccruedButNotReceived"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NoncashInvestingAndFinancingItemsAbstract_019fcd6b-89e2-7ff7-a8be-220088c3fbae" xlink:to="loc_voyg_GovernmentAssistanceAccruedButNotReceived_019fcd6b-8a92-7875-87c6-4a2c3dc7c91d" xlink:type="arc" order="8"/>
  </link:definitionLink>
</link:linkbase>
