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

<!--XBRL Document Created with the Workiva Platform-->
<!--Copyright 2026 Workiva-->
<!--r:019c8b33-c23f-76e9-b7b0-a9dbe7f59dda,g:efce0972-21e6-44b0-abaf-b2d085803184-->
<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://ben.com/role/Cover" xlink:type="simple" xlink:href="ben-20260629.xsd#Cover"/>
  <link:definitionLink xlink:role="http://ben.com/role/Cover" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentInformationLineItems_019c8b33-c23f-76f9-a3be-471300d4d8d9" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_DocumentInformationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentInformationTable_019c8b33-c23f-73bd-ae86-ac00ae26925c" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_DocumentInformationTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_dei_DocumentInformationLineItems_019c8b33-c23f-76f9-a3be-471300d4d8d9" xlink:to="loc_dei_DocumentInformationTable_019c8b33-c23f-73bd-ae86-ac00ae26925c" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementClassOfStockAxis_019c8b33-c23f-7fc7-b80b-23b6d7896fde" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_StatementClassOfStockAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_dei_DocumentInformationTable_019c8b33-c23f-73bd-ae86-ac00ae26925c" xlink:to="loc_us-gaap_StatementClassOfStockAxis_019c8b33-c23f-7fc7-b80b-23b6d7896fde" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_019c8b33-c23f-7fc7-b80b-23b6d7896fde_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementClassOfStockAxis_019c8b33-c23f-7fc7-b80b-23b6d7896fde" xlink:to="loc_us-gaap_ClassOfStockDomain_019c8b33-c23f-7fc7-b80b-23b6d7896fde_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_019c8b33-c23f-7708-b4ef-8c4eb5744f95" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementClassOfStockAxis_019c8b33-c23f-7fc7-b80b-23b6d7896fde" xlink:to="loc_us-gaap_ClassOfStockDomain_019c8b33-c23f-7708-b4ef-8c4eb5744f95" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonClassAMember_019c8b33-c23f-7618-b9fd-7706522f2ecf" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CommonClassAMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_019c8b33-c23f-7708-b4ef-8c4eb5744f95" xlink:to="loc_us-gaap_CommonClassAMember_019c8b33-c23f-7618-b9fd-7706522f2ecf" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WarrantMember_019c8b33-c23f-73fa-8aae-b1ee7cea3f88" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_WarrantMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_019c8b33-c23f-7708-b4ef-8c4eb5744f95" xlink:to="loc_us-gaap_WarrantMember_019c8b33-c23f-73fa-8aae-b1ee7cea3f88" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentType_019c8b33-c23f-7e9a-94a4-0806712c103b" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_DocumentType"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019c8b33-c23f-76f9-a3be-471300d4d8d9" xlink:to="loc_dei_DocumentType_019c8b33-c23f-7e9a-94a4-0806712c103b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityFileNumber_019c8b33-c23f-7492-83c8-b240c3c1bf93" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_EntityFileNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019c8b33-c23f-76f9-a3be-471300d4d8d9" xlink:to="loc_dei_EntityFileNumber_019c8b33-c23f-7492-83c8-b240c3c1bf93" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityRegistrantName_019c8b33-c23f-7cab-9f6a-3c85bb85bde2" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_EntityRegistrantName"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019c8b33-c23f-76f9-a3be-471300d4d8d9" xlink:to="loc_dei_EntityRegistrantName_019c8b33-c23f-7cab-9f6a-3c85bb85bde2" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityIncorporationStateCountryCode_019c8b33-c23f-758b-8ecf-3551914bd9d0" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_EntityIncorporationStateCountryCode"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019c8b33-c23f-76f9-a3be-471300d4d8d9" xlink:to="loc_dei_EntityIncorporationStateCountryCode_019c8b33-c23f-758b-8ecf-3551914bd9d0" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityTaxIdentificationNumber_019c8b33-c23f-7221-af35-e9360145ec53" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_EntityTaxIdentificationNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019c8b33-c23f-76f9-a3be-471300d4d8d9" xlink:to="loc_dei_EntityTaxIdentificationNumber_019c8b33-c23f-7221-af35-e9360145ec53" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressAddressLine1_019c8b33-c23f-7bda-bbc7-9d79d013c123" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_EntityAddressAddressLine1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019c8b33-c23f-76f9-a3be-471300d4d8d9" xlink:to="loc_dei_EntityAddressAddressLine1_019c8b33-c23f-7bda-bbc7-9d79d013c123" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressAddressLine2_019c8b33-c23f-7bfe-9ac0-cdc54272e4af" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_EntityAddressAddressLine2"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019c8b33-c23f-76f9-a3be-471300d4d8d9" xlink:to="loc_dei_EntityAddressAddressLine2_019c8b33-c23f-7bfe-9ac0-cdc54272e4af" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressCityOrTown_019c8b33-c23f-7546-ba02-164b58d3c041" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_EntityAddressCityOrTown"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019c8b33-c23f-76f9-a3be-471300d4d8d9" xlink:to="loc_dei_EntityAddressCityOrTown_019c8b33-c23f-7546-ba02-164b58d3c041" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressStateOrProvince_019c8b33-c23f-705b-a73d-9fe8ad87b07f" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_EntityAddressStateOrProvince"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019c8b33-c23f-76f9-a3be-471300d4d8d9" xlink:to="loc_dei_EntityAddressStateOrProvince_019c8b33-c23f-705b-a73d-9fe8ad87b07f" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressPostalZipCode_019c8b33-c23f-7c00-9f21-06a251a8b9b0" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_EntityAddressPostalZipCode"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019c8b33-c23f-76f9-a3be-471300d4d8d9" xlink:to="loc_dei_EntityAddressPostalZipCode_019c8b33-c23f-7c00-9f21-06a251a8b9b0" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_CityAreaCode_019c8b33-c23f-7d89-bd05-edc2f3369cf5" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_CityAreaCode"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019c8b33-c23f-76f9-a3be-471300d4d8d9" xlink:to="loc_dei_CityAreaCode_019c8b33-c23f-7d89-bd05-edc2f3369cf5" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LocalPhoneNumber_019c8b33-c23f-7d53-a1ca-4ebba18c3d27" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_LocalPhoneNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019c8b33-c23f-76f9-a3be-471300d4d8d9" xlink:to="loc_dei_LocalPhoneNumber_019c8b33-c23f-7d53-a1ca-4ebba18c3d27" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_WrittenCommunications_019c8b33-c23f-7905-b1ad-42f26e491b5f" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_WrittenCommunications"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019c8b33-c23f-76f9-a3be-471300d4d8d9" xlink:to="loc_dei_WrittenCommunications_019c8b33-c23f-7905-b1ad-42f26e491b5f" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_SolicitingMaterial_019c8b33-c23f-778d-b039-48766d105158" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_SolicitingMaterial"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019c8b33-c23f-76f9-a3be-471300d4d8d9" xlink:to="loc_dei_SolicitingMaterial_019c8b33-c23f-778d-b039-48766d105158" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_PreCommencementTenderOffer_019c8b33-c23f-7b56-9444-0cfb2009ab64" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_PreCommencementTenderOffer"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019c8b33-c23f-76f9-a3be-471300d4d8d9" xlink:to="loc_dei_PreCommencementTenderOffer_019c8b33-c23f-7b56-9444-0cfb2009ab64" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_PreCommencementIssuerTenderOffer_019c8b33-c23f-7a82-98da-556e84f6ddd9" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_PreCommencementIssuerTenderOffer"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019c8b33-c23f-76f9-a3be-471300d4d8d9" xlink:to="loc_dei_PreCommencementIssuerTenderOffer_019c8b33-c23f-7a82-98da-556e84f6ddd9" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_Security12bTitle_019c8b33-c23f-71b4-9130-385428fc1046" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_Security12bTitle"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019c8b33-c23f-76f9-a3be-471300d4d8d9" xlink:to="loc_dei_Security12bTitle_019c8b33-c23f-71b4-9130-385428fc1046" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_TradingSymbol_019c8b33-c23f-7329-837c-d0e57470c547" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_TradingSymbol"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019c8b33-c23f-76f9-a3be-471300d4d8d9" xlink:to="loc_dei_TradingSymbol_019c8b33-c23f-7329-837c-d0e57470c547" xlink:type="arc" order="17"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_SecurityExchangeName_019c8b33-c23f-7ed4-88e6-ea43cd4d7c30" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_SecurityExchangeName"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019c8b33-c23f-76f9-a3be-471300d4d8d9" xlink:to="loc_dei_SecurityExchangeName_019c8b33-c23f-7ed4-88e6-ea43cd4d7c30" xlink:type="arc" order="18"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityEmergingGrowthCompany_019c8b33-c23f-7b5d-a135-9aa1dd2a17f8" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_EntityEmergingGrowthCompany"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019c8b33-c23f-76f9-a3be-471300d4d8d9" xlink:to="loc_dei_EntityEmergingGrowthCompany_019c8b33-c23f-7b5d-a135-9aa1dd2a17f8" xlink:type="arc" order="19"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityExTransitionPeriod_019c8b33-c23f-742a-850e-7a9cab656738" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_EntityExTransitionPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019c8b33-c23f-76f9-a3be-471300d4d8d9" xlink:to="loc_dei_EntityExTransitionPeriod_019c8b33-c23f-742a-850e-7a9cab656738" xlink:type="arc" order="20"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentPeriodEndDate_019c8b33-c23f-7f0e-954c-efd57c59de43" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_DocumentPeriodEndDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019c8b33-c23f-76f9-a3be-471300d4d8d9" xlink:to="loc_dei_DocumentPeriodEndDate_019c8b33-c23f-7f0e-954c-efd57c59de43" xlink:type="arc" order="21"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityCentralIndexKey_019c8b33-c23f-7f47-8938-e6ad61e7c0c8" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_EntityCentralIndexKey"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019c8b33-c23f-76f9-a3be-471300d4d8d9" xlink:to="loc_dei_EntityCentralIndexKey_019c8b33-c23f-7f47-8938-e6ad61e7c0c8" xlink:type="arc" order="22"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_AmendmentFlag_019c8b33-c23f-7066-93a4-75bb3cb279e1" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_AmendmentFlag"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019c8b33-c23f-76f9-a3be-471300d4d8d9" xlink:to="loc_dei_AmendmentFlag_019c8b33-c23f-7066-93a4-75bb3cb279e1" xlink:type="arc" order="23"/>
  </link:definitionLink>
</link:linkbase>
