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

<!--XBRL Document Created with the Workiva Platform-->
<!--Copyright 2026 Workiva-->
<!--r:019f5c72-4c10-7e1c-b11b-fba14a0fc876,g:746ba5aa-73d4-4a68-8f9a-1623a07ac4e2-->
<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://fgi-industries.com/role/Cover" xlink:type="simple" xlink:href="fgi-20260630.xsd#Cover"/>
  <link:definitionLink xlink:role="http://fgi-industries.com/role/Cover" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentInformationLineItems_019f5c72-4d4b-75c4-ab76-88e3b33ec662" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentInformationTable_019f5c72-4d4b-7f1d-9660-b6f0d3fd5335" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_dei_DocumentInformationLineItems_019f5c72-4d4b-75c4-ab76-88e3b33ec662" xlink:to="loc_dei_DocumentInformationTable_019f5c72-4d4b-7f1d-9660-b6f0d3fd5335" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementClassOfStockAxis_019f5c72-4d4b-7e44-85c9-c18eea2a9a91" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementClassOfStockAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_dei_DocumentInformationTable_019f5c72-4d4b-7f1d-9660-b6f0d3fd5335" xlink:to="loc_us-gaap_StatementClassOfStockAxis_019f5c72-4d4b-7e44-85c9-c18eea2a9a91" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_019f5c72-4d4b-7e44-85c9-c18eea2a9a91_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementClassOfStockAxis_019f5c72-4d4b-7e44-85c9-c18eea2a9a91" xlink:to="loc_us-gaap_ClassOfStockDomain_019f5c72-4d4b-7e44-85c9-c18eea2a9a91_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_019f5c72-4d4b-7877-9f47-a66453a47d83" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementClassOfStockAxis_019f5c72-4d4b-7e44-85c9-c18eea2a9a91" xlink:to="loc_us-gaap_ClassOfStockDomain_019f5c72-4d4b-7877-9f47-a66453a47d83" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockMember_019f5c72-4d4b-780b-b75d-64a679a92368" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_019f5c72-4d4b-7877-9f47-a66453a47d83" xlink:to="loc_us-gaap_CommonStockMember_019f5c72-4d4b-780b-b75d-64a679a92368" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WarrantMember_019f5c72-4d4b-7cf2-b737-5c121e39e882" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_WarrantMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_019f5c72-4d4b-7877-9f47-a66453a47d83" xlink:to="loc_us-gaap_WarrantMember_019f5c72-4d4b-7cf2-b737-5c121e39e882" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentType_019f5c72-4d4b-75bb-a84f-87ab14b45c2e" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentType"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019f5c72-4d4b-75c4-ab76-88e3b33ec662" xlink:to="loc_dei_DocumentType_019f5c72-4d4b-75bb-a84f-87ab14b45c2e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentQuarterlyReport_019f5c72-4d4b-7eac-a313-a2512d78967e" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentQuarterlyReport"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019f5c72-4d4b-75c4-ab76-88e3b33ec662" xlink:to="loc_dei_DocumentQuarterlyReport_019f5c72-4d4b-7eac-a313-a2512d78967e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentPeriodEndDate_019f5c72-4d4b-7666-9dd2-2524b9b12a82" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentPeriodEndDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019f5c72-4d4b-75c4-ab76-88e3b33ec662" xlink:to="loc_dei_DocumentPeriodEndDate_019f5c72-4d4b-7666-9dd2-2524b9b12a82" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentTransitionReport_019f5c72-4d4b-7efa-92a8-24bc0f986676" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentTransitionReport"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019f5c72-4d4b-75c4-ab76-88e3b33ec662" xlink:to="loc_dei_DocumentTransitionReport_019f5c72-4d4b-7efa-92a8-24bc0f986676" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityFileNumber_019f5c72-4d4b-7894-ba34-3c41cc35a537" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityFileNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019f5c72-4d4b-75c4-ab76-88e3b33ec662" xlink:to="loc_dei_EntityFileNumber_019f5c72-4d4b-7894-ba34-3c41cc35a537" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityRegistrantName_019f5c72-4d4b-7c5a-8f22-56e570217803" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityRegistrantName"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019f5c72-4d4b-75c4-ab76-88e3b33ec662" xlink:to="loc_dei_EntityRegistrantName_019f5c72-4d4b-7c5a-8f22-56e570217803" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityIncorporationStateCountryCode_019f5c72-4d4b-769c-bb82-9bf7d47833f6" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityIncorporationStateCountryCode"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019f5c72-4d4b-75c4-ab76-88e3b33ec662" xlink:to="loc_dei_EntityIncorporationStateCountryCode_019f5c72-4d4b-769c-bb82-9bf7d47833f6" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityTaxIdentificationNumber_019f5c72-4d4b-7f8b-93c5-6e969f1dd1bc" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityTaxIdentificationNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019f5c72-4d4b-75c4-ab76-88e3b33ec662" xlink:to="loc_dei_EntityTaxIdentificationNumber_019f5c72-4d4b-7f8b-93c5-6e969f1dd1bc" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressAddressLine1_019f5c72-4d4b-7606-a3d5-111dec90f415" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityAddressAddressLine1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019f5c72-4d4b-75c4-ab76-88e3b33ec662" xlink:to="loc_dei_EntityAddressAddressLine1_019f5c72-4d4b-7606-a3d5-111dec90f415" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressCityOrTown_019f5c72-4d4b-7a54-8e8e-6fc629b5e90f" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityAddressCityOrTown"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019f5c72-4d4b-75c4-ab76-88e3b33ec662" xlink:to="loc_dei_EntityAddressCityOrTown_019f5c72-4d4b-7a54-8e8e-6fc629b5e90f" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressStateOrProvince_019f5c72-4d4b-7834-b3b8-c1a57b59b43a" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityAddressStateOrProvince"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019f5c72-4d4b-75c4-ab76-88e3b33ec662" xlink:to="loc_dei_EntityAddressStateOrProvince_019f5c72-4d4b-7834-b3b8-c1a57b59b43a" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressPostalZipCode_019f5c72-4d4b-7256-a42e-2129b5f4bca1" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityAddressPostalZipCode"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019f5c72-4d4b-75c4-ab76-88e3b33ec662" xlink:to="loc_dei_EntityAddressPostalZipCode_019f5c72-4d4b-7256-a42e-2129b5f4bca1" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_CityAreaCode_019f5c72-4d4b-7a03-85b6-7a2c0b6f8202" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_CityAreaCode"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019f5c72-4d4b-75c4-ab76-88e3b33ec662" xlink:to="loc_dei_CityAreaCode_019f5c72-4d4b-7a03-85b6-7a2c0b6f8202" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LocalPhoneNumber_019f5c72-4d4b-7dac-867c-43f938d941ea" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LocalPhoneNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019f5c72-4d4b-75c4-ab76-88e3b33ec662" xlink:to="loc_dei_LocalPhoneNumber_019f5c72-4d4b-7dac-867c-43f938d941ea" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_Security12bTitle_019f5c72-4d4b-711c-866d-9ef18d595357" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_Security12bTitle"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019f5c72-4d4b-75c4-ab76-88e3b33ec662" xlink:to="loc_dei_Security12bTitle_019f5c72-4d4b-711c-866d-9ef18d595357" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_TradingSymbol_019f5c72-4d4b-71c3-9616-2c3ca5a07378" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_TradingSymbol"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019f5c72-4d4b-75c4-ab76-88e3b33ec662" xlink:to="loc_dei_TradingSymbol_019f5c72-4d4b-71c3-9616-2c3ca5a07378" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_SecurityExchangeName_019f5c72-4d4b-71f4-824e-8dd88ea5faf7" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_SecurityExchangeName"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019f5c72-4d4b-75c4-ab76-88e3b33ec662" xlink:to="loc_dei_SecurityExchangeName_019f5c72-4d4b-71f4-824e-8dd88ea5faf7" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityCurrentReportingStatus_019f5c72-4d4b-7217-b779-64d996826d63" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityCurrentReportingStatus"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019f5c72-4d4b-75c4-ab76-88e3b33ec662" xlink:to="loc_dei_EntityCurrentReportingStatus_019f5c72-4d4b-7217-b779-64d996826d63" xlink:type="arc" order="17"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityInteractiveDataCurrent_019f5c72-4d4b-7a31-bda7-f07a6f016263" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityInteractiveDataCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019f5c72-4d4b-75c4-ab76-88e3b33ec662" xlink:to="loc_dei_EntityInteractiveDataCurrent_019f5c72-4d4b-7a31-bda7-f07a6f016263" xlink:type="arc" order="18"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityFilerCategory_019f5c72-4d4b-7b8c-85f9-f98873ffa5ff" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityFilerCategory"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019f5c72-4d4b-75c4-ab76-88e3b33ec662" xlink:to="loc_dei_EntityFilerCategory_019f5c72-4d4b-7b8c-85f9-f98873ffa5ff" xlink:type="arc" order="19"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntitySmallBusiness_019f5c72-4d4b-7e2e-8406-f1a9ef439c0e" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntitySmallBusiness"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019f5c72-4d4b-75c4-ab76-88e3b33ec662" xlink:to="loc_dei_EntitySmallBusiness_019f5c72-4d4b-7e2e-8406-f1a9ef439c0e" xlink:type="arc" order="20"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityEmergingGrowthCompany_019f5c72-4d4b-7a99-ab5c-a7f45c2d6094" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityEmergingGrowthCompany"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019f5c72-4d4b-75c4-ab76-88e3b33ec662" xlink:to="loc_dei_EntityEmergingGrowthCompany_019f5c72-4d4b-7a99-ab5c-a7f45c2d6094" xlink:type="arc" order="21"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityExTransitionPeriod_019f5c72-4d4b-77cb-9d89-5dd73a0b4bc8" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityExTransitionPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019f5c72-4d4b-75c4-ab76-88e3b33ec662" xlink:to="loc_dei_EntityExTransitionPeriod_019f5c72-4d4b-77cb-9d89-5dd73a0b4bc8" xlink:type="arc" order="22"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityShellCompany_019f5c72-4d4b-7af5-ac09-f332a32a1581" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityShellCompany"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019f5c72-4d4b-75c4-ab76-88e3b33ec662" xlink:to="loc_dei_EntityShellCompany_019f5c72-4d4b-7af5-ac09-f332a32a1581" xlink:type="arc" order="23"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityCommonStockSharesOutstanding_019f5c72-4d4b-785b-a8f5-04e5ff105c9e" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityCommonStockSharesOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019f5c72-4d4b-75c4-ab76-88e3b33ec662" xlink:to="loc_dei_EntityCommonStockSharesOutstanding_019f5c72-4d4b-785b-a8f5-04e5ff105c9e" xlink:type="arc" order="24"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityCentralIndexKey_019f5c72-4d4b-7287-8212-a7691689d8a3" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityCentralIndexKey"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019f5c72-4d4b-75c4-ab76-88e3b33ec662" xlink:to="loc_dei_EntityCentralIndexKey_019f5c72-4d4b-7287-8212-a7691689d8a3" xlink:type="arc" order="25"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_CurrentFiscalYearEndDate_019f5c72-4d4b-7bf0-a65b-2e36e497c5c5" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_CurrentFiscalYearEndDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019f5c72-4d4b-75c4-ab76-88e3b33ec662" xlink:to="loc_dei_CurrentFiscalYearEndDate_019f5c72-4d4b-7bf0-a65b-2e36e497c5c5" xlink:type="arc" order="26"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentFiscalYearFocus_019f5c72-4d4b-7b4f-ad18-0c20f49ab40a" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentFiscalYearFocus"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019f5c72-4d4b-75c4-ab76-88e3b33ec662" xlink:to="loc_dei_DocumentFiscalYearFocus_019f5c72-4d4b-7b4f-ad18-0c20f49ab40a" xlink:type="arc" order="27"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentFiscalPeriodFocus_019f5c72-4d4b-7556-a294-a77c218684b3" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentFiscalPeriodFocus"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019f5c72-4d4b-75c4-ab76-88e3b33ec662" xlink:to="loc_dei_DocumentFiscalPeriodFocus_019f5c72-4d4b-7556-a294-a77c218684b3" xlink:type="arc" order="28"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_AmendmentFlag_019f5c72-4d4b-7860-aa2c-94ef745087a5" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_AmendmentFlag"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019f5c72-4d4b-75c4-ab76-88e3b33ec662" xlink:to="loc_dei_AmendmentFlag_019f5c72-4d4b-7860-aa2c-94ef745087a5" xlink:type="arc" order="29"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://fgi-industries.com/role/CONDENSEDCONSOLIDATEDBALANCESHEETS" xlink:type="simple" xlink:href="fgi-20260630.xsd#CONDENSEDCONSOLIDATEDBALANCESHEETS"/>
  <link:definitionLink xlink:role="http://fgi-industries.com/role/CONDENSEDCONSOLIDATEDBALANCESHEETS" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_019f5c72-4d4b-7e40-b2fb-1e3bf2c8b10a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_019f5c72-4d4b-7aa3-a522-57c2017196a8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_019f5c72-4d4b-7e40-b2fb-1e3bf2c8b10a" xlink:to="loc_us-gaap_StatementTable_019f5c72-4d4b-7aa3-a522-57c2017196a8" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019f5c72-4d4b-7e9e-b9f9-509b124c853d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_019f5c72-4d4b-7aa3-a522-57c2017196a8" xlink:to="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019f5c72-4d4b-7e9e-b9f9-509b124c853d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_019f5c72-4d4b-7e9e-b9f9-509b124c853d_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019f5c72-4d4b-7e9e-b9f9-509b124c853d" xlink:to="loc_us-gaap_RelatedPartyDomain_019f5c72-4d4b-7e9e-b9f9-509b124c853d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_019f5c72-4d4b-7f9f-ba6c-257fc86c91ae" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019f5c72-4d4b-7e9e-b9f9-509b124c853d" xlink:to="loc_us-gaap_RelatedPartyDomain_019f5c72-4d4b-7f9f-ba6c-257fc86c91ae" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NonrelatedPartyMember_019f5c72-4d4b-705d-a3da-da86d818d78b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NonrelatedPartyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyDomain_019f5c72-4d4b-7f9f-ba6c-257fc86c91ae" xlink:to="loc_us-gaap_NonrelatedPartyMember_019f5c72-4d4b-705d-a3da-da86d818d78b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyMember_019f5c72-4d4b-7b67-84d1-27291765f4db" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyDomain_019f5c72-4d4b-7f9f-ba6c-257fc86c91ae" xlink:to="loc_us-gaap_RelatedPartyMember_019f5c72-4d4b-7b67-84d1-27291765f4db" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsAbstract_019f5c72-4d4b-7e8a-8c28-646e83acb1b4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AssetsAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019f5c72-4d4b-7e40-b2fb-1e3bf2c8b10a" xlink:to="loc_us-gaap_AssetsAbstract_019f5c72-4d4b-7e8a-8c28-646e83acb1b4" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsCurrentAbstract_019f5c72-4d4b-7311-b855-f16b6c4bf4fe" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AssetsCurrentAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_019f5c72-4d4b-7e8a-8c28-646e83acb1b4" xlink:to="loc_us-gaap_AssetsCurrentAbstract_019f5c72-4d4b-7311-b855-f16b6c4bf4fe" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Cash_019f5c72-4d4b-7fbe-9067-e2bcb53635d9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_Cash"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsCurrentAbstract_019f5c72-4d4b-7311-b855-f16b6c4bf4fe" xlink:to="loc_us-gaap_Cash_019f5c72-4d4b-7fbe-9067-e2bcb53635d9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsReceivableNetCurrent_019f5c72-4d4b-7570-b737-588506681e4f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccountsReceivableNetCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsCurrentAbstract_019f5c72-4d4b-7311-b855-f16b6c4bf4fe" xlink:to="loc_us-gaap_AccountsReceivableNetCurrent_019f5c72-4d4b-7570-b737-588506681e4f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InventoryNet_019f5c72-4d4b-7181-9771-1f65fe818483" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InventoryNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsCurrentAbstract_019f5c72-4d4b-7311-b855-f16b6c4bf4fe" xlink:to="loc_us-gaap_InventoryNet_019f5c72-4d4b-7181-9771-1f65fe818483" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PrepaidExpenseAndOtherAssetsCurrent_019f5c72-4d4b-7755-8375-f9514ec5dfe1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PrepaidExpenseAndOtherAssetsCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsCurrentAbstract_019f5c72-4d4b-7311-b855-f16b6c4bf4fe" xlink:to="loc_us-gaap_PrepaidExpenseAndOtherAssetsCurrent_019f5c72-4d4b-7755-8375-f9514ec5dfe1" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsCurrent_019f5c72-4d4b-7400-8142-8c9a3a9a1846" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AssetsCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsCurrentAbstract_019f5c72-4d4b-7311-b855-f16b6c4bf4fe" xlink:to="loc_us-gaap_AssetsCurrent_019f5c72-4d4b-7400-8142-8c9a3a9a1846" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentNet_019f5c72-4d4b-70f8-9aed-79c1fdc9674a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_019f5c72-4d4b-7e8a-8c28-646e83acb1b4" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentNet_019f5c72-4d4b-70f8-9aed-79c1fdc9674a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAssetsNoncurrentAbstract_019f5c72-4d4b-717a-aa97-83e886d5f0de" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherAssetsNoncurrentAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_019f5c72-4d4b-7e8a-8c28-646e83acb1b4" xlink:to="loc_us-gaap_OtherAssetsNoncurrentAbstract_019f5c72-4d4b-717a-aa97-83e886d5f0de" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsNet_019f5c72-4d4b-716b-9daa-1af1f2316809" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherAssetsNoncurrentAbstract_019f5c72-4d4b-717a-aa97-83e886d5f0de" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsNet_019f5c72-4d4b-716b-9daa-1af1f2316809" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseRightOfUseAsset_019f5c72-4d4b-782a-b6d6-c0c3b3a8aa45" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingLeaseRightOfUseAsset"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherAssetsNoncurrentAbstract_019f5c72-4d4b-717a-aa97-83e886d5f0de" xlink:to="loc_us-gaap_OperatingLeaseRightOfUseAsset_019f5c72-4d4b-782a-b6d6-c0c3b3a8aa45" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredIncomeTaxAssetsNet_019f5c72-4d4b-70b9-b60a-1581cedf81f7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredIncomeTaxAssetsNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherAssetsNoncurrentAbstract_019f5c72-4d4b-717a-aa97-83e886d5f0de" xlink:to="loc_us-gaap_DeferredIncomeTaxAssetsNet_019f5c72-4d4b-70b9-b60a-1581cedf81f7" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAssetsNoncurrent_019f5c72-4d4b-715c-aad6-fb972603fcfa" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherAssetsNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherAssetsNoncurrentAbstract_019f5c72-4d4b-717a-aa97-83e886d5f0de" xlink:to="loc_us-gaap_OtherAssetsNoncurrent_019f5c72-4d4b-715c-aad6-fb972603fcfa" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsNoncurrentOtherThanNoncurrentInvestmentsAndPropertyPlantAndEquipment_019f5c72-4d4b-7959-9496-7e1f387afb53" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AssetsNoncurrentOtherThanNoncurrentInvestmentsAndPropertyPlantAndEquipment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherAssetsNoncurrentAbstract_019f5c72-4d4b-717a-aa97-83e886d5f0de" xlink:to="loc_us-gaap_AssetsNoncurrentOtherThanNoncurrentInvestmentsAndPropertyPlantAndEquipment_019f5c72-4d4b-7959-9496-7e1f387afb53" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Assets_019f5c72-4d4b-765a-bcdb-efdd5e29d009" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_Assets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_019f5c72-4d4b-7e8a-8c28-646e83acb1b4" xlink:to="loc_us-gaap_Assets_019f5c72-4d4b-765a-bcdb-efdd5e29d009" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_019f5c72-4d4b-7624-b50f-d03e5ff00e7a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LiabilitiesAndStockholdersEquityAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019f5c72-4d4b-7e40-b2fb-1e3bf2c8b10a" xlink:to="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_019f5c72-4d4b-7624-b50f-d03e5ff00e7a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesCurrentAbstract_019f5c72-4d4b-78c8-9f95-6ff645e196be" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LiabilitiesCurrentAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_019f5c72-4d4b-7624-b50f-d03e5ff00e7a" xlink:to="loc_us-gaap_LiabilitiesCurrentAbstract_019f5c72-4d4b-78c8-9f95-6ff645e196be" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShortTermBorrowings_019f5c72-4d4b-7bc7-9ca8-06328191a614" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShortTermBorrowings"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_019f5c72-4d4b-78c8-9f95-6ff645e196be" xlink:to="loc_us-gaap_ShortTermBorrowings_019f5c72-4d4b-7bc7-9ca8-06328191a614" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsPayableCurrent_019f5c72-4d4b-706c-9070-5c2833d5d3d1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccountsPayableCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_019f5c72-4d4b-78c8-9f95-6ff645e196be" xlink:to="loc_us-gaap_AccountsPayableCurrent_019f5c72-4d4b-706c-9070-5c2833d5d3d1" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiabilityCurrent_019f5c72-4d4b-7b64-b961-b6e5a3484813" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingLeaseLiabilityCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_019f5c72-4d4b-78c8-9f95-6ff645e196be" xlink:to="loc_us-gaap_OperatingLeaseLiabilityCurrent_019f5c72-4d4b-7b64-b961-b6e5a3484813" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_fgi_AccruedExpensesAndOtherCurrentLiabilities_019f5c72-4d4b-73bd-a829-97a5deb8186e" xlink:href="fgi-20260630.xsd#fgi_AccruedExpensesAndOtherCurrentLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_019f5c72-4d4b-78c8-9f95-6ff645e196be" xlink:to="loc_fgi_AccruedExpensesAndOtherCurrentLiabilities_019f5c72-4d4b-73bd-a829-97a5deb8186e" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesCurrent_019f5c72-4d4b-7bda-8d81-b0dc441eaf3e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LiabilitiesCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_019f5c72-4d4b-78c8-9f95-6ff645e196be" xlink:to="loc_us-gaap_LiabilitiesCurrent_019f5c72-4d4b-7bda-8d81-b0dc441eaf3e" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesNoncurrentAbstract_019f5c72-4d4b-7bc6-a0ec-02daadbdcb2e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LiabilitiesNoncurrentAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_019f5c72-4d4b-7624-b50f-d03e5ff00e7a" xlink:to="loc_us-gaap_LiabilitiesNoncurrentAbstract_019f5c72-4d4b-7bc6-a0ec-02daadbdcb2e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiabilityNoncurrent_019f5c72-4d4b-71ff-be49-d2d68546dddb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingLeaseLiabilityNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesNoncurrentAbstract_019f5c72-4d4b-7bc6-a0ec-02daadbdcb2e" xlink:to="loc_us-gaap_OperatingLeaseLiabilityNoncurrent_019f5c72-4d4b-71ff-be49-d2d68546dddb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Liabilities_019f5c72-4d4b-7251-8172-e8f7eca5deaa" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_Liabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_019f5c72-4d4b-7624-b50f-d03e5ff00e7a" xlink:to="loc_us-gaap_Liabilities_019f5c72-4d4b-7251-8172-e8f7eca5deaa" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommitmentsAndContingencies_019f5c72-4d4b-748d-95af-67297cbc26b0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommitmentsAndContingencies"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_019f5c72-4d4b-7624-b50f-d03e5ff00e7a" xlink:to="loc_us-gaap_CommitmentsAndContingencies_019f5c72-4d4b-748d-95af-67297cbc26b0" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquityAbstract_019f5c72-4d4b-7687-9a59-c89313859f78" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockholdersEquityAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_019f5c72-4d4b-7624-b50f-d03e5ff00e7a" xlink:to="loc_us-gaap_StockholdersEquityAbstract_019f5c72-4d4b-7687-9a59-c89313859f78" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PreferredStockValue_019f5c72-4d4b-725f-a2db-195eae9a4a6f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PreferredStockValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityAbstract_019f5c72-4d4b-7687-9a59-c89313859f78" xlink:to="loc_us-gaap_PreferredStockValue_019f5c72-4d4b-725f-a2db-195eae9a4a6f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockValue_019f5c72-4d4b-78bd-b1c9-75b2a4c1d707" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityAbstract_019f5c72-4d4b-7687-9a59-c89313859f78" xlink:to="loc_us-gaap_CommonStockValue_019f5c72-4d4b-78bd-b1c9-75b2a4c1d707" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdditionalPaidInCapitalCommonStock_019f5c72-4d4b-759e-b6ae-67d10483abe7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AdditionalPaidInCapitalCommonStock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityAbstract_019f5c72-4d4b-7687-9a59-c89313859f78" xlink:to="loc_us-gaap_AdditionalPaidInCapitalCommonStock_019f5c72-4d4b-759e-b6ae-67d10483abe7" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetainedEarningsAccumulatedDeficit_019f5c72-4d4b-7d2a-9713-21dfc800bf34" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RetainedEarningsAccumulatedDeficit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityAbstract_019f5c72-4d4b-7687-9a59-c89313859f78" xlink:to="loc_us-gaap_RetainedEarningsAccumulatedDeficit_019f5c72-4d4b-7d2a-9713-21dfc800bf34" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_019f5c72-4d4b-7edc-ad78-fe3948d72c33" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityAbstract_019f5c72-4d4b-7687-9a59-c89313859f78" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_019f5c72-4d4b-7edc-ad78-fe3948d72c33" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_019f5c72-4d4b-7cd0-a3dc-4ceb0b59c73f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockholdersEquity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityAbstract_019f5c72-4d4b-7687-9a59-c89313859f78" xlink:to="loc_us-gaap_StockholdersEquity_019f5c72-4d4b-7cd0-a3dc-4ceb0b59c73f" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MinorityInterest_019f5c72-4d4b-786d-a69a-a691149aa129" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MinorityInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityAbstract_019f5c72-4d4b-7687-9a59-c89313859f78" xlink:to="loc_us-gaap_MinorityInterest_019f5c72-4d4b-786d-a69a-a691149aa129" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_019f5c72-4d4b-7ada-a52e-27374ff9bd04" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityAbstract_019f5c72-4d4b-7687-9a59-c89313859f78" xlink:to="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_019f5c72-4d4b-7ada-a52e-27374ff9bd04" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesAndStockholdersEquity_019f5c72-4d4b-73f6-9610-650a60b0c494" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LiabilitiesAndStockholdersEquity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_019f5c72-4d4b-7624-b50f-d03e5ff00e7a" xlink:to="loc_us-gaap_LiabilitiesAndStockholdersEquity_019f5c72-4d4b-73f6-9610-650a60b0c494" xlink:type="arc" order="6"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://fgi-industries.com/role/UNAUDITEDCONDENSEDCONSOLIDATEDSTATEMENTSOFCHANGESINSHAREHOLDERSEQUITY" xlink:type="simple" xlink:href="fgi-20260630.xsd#UNAUDITEDCONDENSEDCONSOLIDATEDSTATEMENTSOFCHANGESINSHAREHOLDERSEQUITY"/>
  <link:definitionLink xlink:role="http://fgi-industries.com/role/UNAUDITEDCONDENSEDCONSOLIDATEDSTATEMENTSOFCHANGESINSHAREHOLDERSEQUITY" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_019f5c72-4d4c-79f6-890c-1c3459b9aa25" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_019f5c72-4d4c-7474-a64e-4cd9472c3f23" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_019f5c72-4d4c-79f6-890c-1c3459b9aa25" xlink:to="loc_us-gaap_StatementTable_019f5c72-4d4c-7474-a64e-4cd9472c3f23" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_019f5c72-4d4c-72d6-be9b-c6c44d34b661" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementEquityComponentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_019f5c72-4d4c-7474-a64e-4cd9472c3f23" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_019f5c72-4d4c-72d6-be9b-c6c44d34b661" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_019f5c72-4d4c-72d6-be9b-c6c44d34b661_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_019f5c72-4d4c-72d6-be9b-c6c44d34b661" xlink:to="loc_us-gaap_EquityComponentDomain_019f5c72-4d4c-72d6-be9b-c6c44d34b661_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_019f5c72-4d4c-7c01-a9d9-67cbc06754a3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_019f5c72-4d4c-72d6-be9b-c6c44d34b661" xlink:to="loc_us-gaap_EquityComponentDomain_019f5c72-4d4c-7c01-a9d9-67cbc06754a3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockMember_019f5c72-4d4c-702a-ae09-525f7eced89c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_019f5c72-4d4c-7c01-a9d9-67cbc06754a3" xlink:to="loc_us-gaap_CommonStockMember_019f5c72-4d4c-702a-ae09-525f7eced89c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdditionalPaidInCapitalMember_019f5c72-4d4c-724f-a31f-71b679fd3ab3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AdditionalPaidInCapitalMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_019f5c72-4d4c-7c01-a9d9-67cbc06754a3" xlink:to="loc_us-gaap_AdditionalPaidInCapitalMember_019f5c72-4d4c-724f-a31f-71b679fd3ab3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetainedEarningsMember_019f5c72-4d4c-7c5c-8200-0e7b341782dd" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RetainedEarningsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_019f5c72-4d4c-7c01-a9d9-67cbc06754a3" xlink:to="loc_us-gaap_RetainedEarningsMember_019f5c72-4d4c-7c5c-8200-0e7b341782dd" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_019f5c72-4d4c-7763-b9cf-2e3e81aaa209" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_019f5c72-4d4c-7c01-a9d9-67cbc06754a3" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_019f5c72-4d4c-7763-b9cf-2e3e81aaa209" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NoncontrollingInterestMember_019f5c72-4d4c-7f72-b555-44e8181f33a4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NoncontrollingInterestMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_019f5c72-4d4c-7c01-a9d9-67cbc06754a3" xlink:to="loc_us-gaap_NoncontrollingInterestMember_019f5c72-4d4c-7f72-b555-44e8181f33a4" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019f5c72-4d4c-7a9b-97a1-bc0df0ee3e78" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInStockholdersEquityRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019f5c72-4d4c-79f6-890c-1c3459b9aa25" xlink:to="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019f5c72-4d4c-7a9b-97a1-bc0df0ee3e78" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharesIssued_019f5c72-4d4c-7730-9044-fe2005a04ac4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SharesIssued"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019f5c72-4d4c-7a9b-97a1-bc0df0ee3e78" xlink:to="loc_us-gaap_SharesIssued_019f5c72-4d4c-7730-9044-fe2005a04ac4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_019f5c72-4d4c-7ca6-add8-cebdb8fd7775" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019f5c72-4d4c-7a9b-97a1-bc0df0ee3e78" xlink:to="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_019f5c72-4d4c-7ca6-add8-cebdb8fd7775" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation_019f5c72-4d4c-748d-8d95-38e800529340" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019f5c72-4d4c-7a9b-97a1-bc0df0ee3e78" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation_019f5c72-4d4c-748d-8d95-38e800529340" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation_019f5c72-4d4c-7aaa-9e4c-1c928be3e6e6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019f5c72-4d4c-7a9b-97a1-bc0df0ee3e78" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation_019f5c72-4d4c-7aaa-9e4c-1c928be3e6e6" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProfitLoss_019f5c72-4d4c-7c5a-ae3a-3d3d9135e183" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProfitLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019f5c72-4d4c-7a9b-97a1-bc0df0ee3e78" xlink:to="loc_us-gaap_ProfitLoss_019f5c72-4d4c-7c5a-ae3a-3d3d9135e183" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax_019f5c72-4d4c-7ade-97b5-dccaa9ef4dcc" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019f5c72-4d4c-7a9b-97a1-bc0df0ee3e78" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax_019f5c72-4d4c-7ade-97b5-dccaa9ef4dcc" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharesIssued_019f5c72-4d4c-71d9-be4b-59bba42e7fff" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SharesIssued"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_019f5c72-4d4c-74b0-8996-ac64f0fd2d42" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://fgi-industries.com/role/UNAUDITEDCONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS" xlink:type="simple" xlink:href="fgi-20260630.xsd#UNAUDITEDCONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS"/>
  <link:definitionLink xlink:role="http://fgi-industries.com/role/UNAUDITEDCONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_019f5c72-4d4c-782d-8e66-b04a9f4decbe" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_019f5c72-4d4c-763a-b630-4a980245e97d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_019f5c72-4d4c-782d-8e66-b04a9f4decbe" xlink:to="loc_us-gaap_StatementTable_019f5c72-4d4c-763a-b630-4a980245e97d" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019f5c72-4d4c-7c23-b20d-6c856ee1d780" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_019f5c72-4d4c-763a-b630-4a980245e97d" xlink:to="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019f5c72-4d4c-7c23-b20d-6c856ee1d780" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_019f5c72-4d4c-7c23-b20d-6c856ee1d780_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019f5c72-4d4c-7c23-b20d-6c856ee1d780" xlink:to="loc_us-gaap_RelatedPartyDomain_019f5c72-4d4c-7c23-b20d-6c856ee1d780_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_019f5c72-4d4c-7dd8-91f9-9e76e6733de4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019f5c72-4d4c-7c23-b20d-6c856ee1d780" xlink:to="loc_us-gaap_RelatedPartyDomain_019f5c72-4d4c-7dd8-91f9-9e76e6733de4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NonrelatedPartyMember_019f5c72-4d4c-7fc9-9756-cb15a6b76ef0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NonrelatedPartyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyDomain_019f5c72-4d4c-7dd8-91f9-9e76e6733de4" xlink:to="loc_us-gaap_NonrelatedPartyMember_019f5c72-4d4c-7fc9-9756-cb15a6b76ef0" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyMember_019f5c72-4d4c-78b3-b140-1b2444d26a7b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyDomain_019f5c72-4d4c-7dd8-91f9-9e76e6733de4" xlink:to="loc_us-gaap_RelatedPartyMember_019f5c72-4d4c-78b3-b140-1b2444d26a7b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_019f5c72-4d4c-72bd-a7c2-3e7345aeb1ab" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019f5c72-4d4c-782d-8e66-b04a9f4decbe" xlink:to="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_019f5c72-4d4c-72bd-a7c2-3e7345aeb1ab" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProfitLoss_019f5c72-4d4c-76e4-bde6-d9fddd30ec53" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProfitLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_019f5c72-4d4c-72bd-a7c2-3e7345aeb1ab" xlink:to="loc_us-gaap_ProfitLoss_019f5c72-4d4c-76e4-bde6-d9fddd30ec53" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_019f5c72-4d4c-74f9-8821-0d235a05332b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_019f5c72-4d4c-72bd-a7c2-3e7345aeb1ab" xlink:to="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_019f5c72-4d4c-74f9-8821-0d235a05332b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Depreciation_019f5c72-4d4c-7e59-87af-dd30411c9521" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_Depreciation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_019f5c72-4d4c-74f9-8821-0d235a05332b" xlink:to="loc_us-gaap_Depreciation_019f5c72-4d4c-7e59-87af-dd30411c9521" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AmortizationOfIntangibleAssets_019f5c72-4d4c-7b48-b4ad-95aa78629ff3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AmortizationOfIntangibleAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_019f5c72-4d4c-74f9-8821-0d235a05332b" xlink:to="loc_us-gaap_AmortizationOfIntangibleAssets_019f5c72-4d4c-7b48-b4ad-95aa78629ff3" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensation_019f5c72-4d4c-7a43-9f1c-503fa306a419" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_019f5c72-4d4c-74f9-8821-0d235a05332b" xlink:to="loc_us-gaap_ShareBasedCompensation_019f5c72-4d4c-7a43-9f1c-503fa306a419" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProvisionForDoubtfulAccounts_019f5c72-4d4c-7fdf-aeb5-a6094d12fe2a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProvisionForDoubtfulAccounts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_019f5c72-4d4c-74f9-8821-0d235a05332b" xlink:to="loc_us-gaap_ProvisionForDoubtfulAccounts_019f5c72-4d4c-7fdf-aeb5-a6094d12fe2a" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_fgi_ProvisionForAccruedDefectiveReturnAndDiscountOnAccountsReceivableCurrent_019f5c72-4d4c-74b0-92ba-17efdf571745" xlink:href="fgi-20260630.xsd#fgi_ProvisionForAccruedDefectiveReturnAndDiscountOnAccountsReceivableCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_019f5c72-4d4c-74f9-8821-0d235a05332b" xlink:to="loc_fgi_ProvisionForAccruedDefectiveReturnAndDiscountOnAccountsReceivableCurrent_019f5c72-4d4c-74b0-92ba-17efdf571745" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignCurrencyTransactionGainLossBeforeTax_019f5c72-4d4c-7684-bf6d-c79c40f091b2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ForeignCurrencyTransactionGainLossBeforeTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_019f5c72-4d4c-74f9-8821-0d235a05332b" xlink:to="loc_us-gaap_ForeignCurrencyTransactionGainLossBeforeTax_019f5c72-4d4c-7684-bf6d-c79c40f091b2" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredIncomeTaxesAndTaxCredits_019f5c72-4d4c-79f5-9247-23f368cb0e98" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredIncomeTaxesAndTaxCredits"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_019f5c72-4d4c-74f9-8821-0d235a05332b" xlink:to="loc_us-gaap_DeferredIncomeTaxesAndTaxCredits_019f5c72-4d4c-79f5-9247-23f368cb0e98" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_019f5c72-4d4c-7b72-bd02-ca3913cd3eed" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInOperatingCapitalAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_019f5c72-4d4c-74f9-8821-0d235a05332b" xlink:to="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_019f5c72-4d4c-7b72-bd02-ca3913cd3eed" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInAccountsReceivable_019f5c72-4d4c-7fcf-b2f9-da7fe36ce19b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInAccountsReceivable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_019f5c72-4d4c-7b72-bd02-ca3913cd3eed" xlink:to="loc_us-gaap_IncreaseDecreaseInAccountsReceivable_019f5c72-4d4c-7fcf-b2f9-da7fe36ce19b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInInventories_019f5c72-4d4c-758b-b4ae-151c1a26d731" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInInventories"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_019f5c72-4d4c-7b72-bd02-ca3913cd3eed" xlink:to="loc_us-gaap_IncreaseDecreaseInInventories_019f5c72-4d4c-758b-b4ae-151c1a26d731" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_019f5c72-4d4c-7c01-9324-18c1a917ed03" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_019f5c72-4d4c-7b72-bd02-ca3913cd3eed" xlink:to="loc_us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_019f5c72-4d4c-7c01-9324-18c1a917ed03" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInOtherNoncurrentAssets_019f5c72-4d4c-7ca2-b995-95e336169c02" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInOtherNoncurrentAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_019f5c72-4d4c-7b72-bd02-ca3913cd3eed" xlink:to="loc_us-gaap_IncreaseDecreaseInOtherNoncurrentAssets_019f5c72-4d4c-7ca2-b995-95e336169c02" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInAccruedIncomeTaxesPayable_019f5c72-4d4c-782a-b60b-34dc1fba0449" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInAccruedIncomeTaxesPayable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_019f5c72-4d4c-7b72-bd02-ca3913cd3eed" xlink:to="loc_us-gaap_IncreaseDecreaseInAccruedIncomeTaxesPayable_019f5c72-4d4c-782a-b60b-34dc1fba0449" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInAccountsPayable_019f5c72-4d4c-75ff-b96a-df691bb190e1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInAccountsPayable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_019f5c72-4d4c-7b72-bd02-ca3913cd3eed" xlink:to="loc_us-gaap_IncreaseDecreaseInAccountsPayable_019f5c72-4d4c-75ff-b96a-df691bb190e1" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInOperatingLeaseLiability_019f5c72-4d4c-7e2b-8d57-0d7fbe2c0bdc" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInOperatingLeaseLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_019f5c72-4d4c-7b72-bd02-ca3913cd3eed" xlink:to="loc_us-gaap_IncreaseDecreaseInOperatingLeaseLiability_019f5c72-4d4c-7e2b-8d57-0d7fbe2c0bdc" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities_019f5c72-4d4c-7cbb-ab8f-a4eb6116d849" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_019f5c72-4d4c-7b72-bd02-ca3913cd3eed" xlink:to="loc_us-gaap_IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities_019f5c72-4d4c-7cbb-ab8f-a4eb6116d849" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019f5c72-4d4c-7ac7-aef7-f662fa59cee0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_019f5c72-4d4c-74f9-8821-0d235a05332b" xlink:to="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019f5c72-4d4c-7ac7-aef7-f662fa59cee0" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_019f5c72-4d4c-7654-9f27-8e2dea5098f6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019f5c72-4d4c-782d-8e66-b04a9f4decbe" xlink:to="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_019f5c72-4d4c-7654-9f27-8e2dea5098f6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_019f5c72-4d4c-70ac-a26f-9ad99a3f3e15" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PaymentsToAcquirePropertyPlantAndEquipment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_019f5c72-4d4c-7654-9f27-8e2dea5098f6" xlink:to="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_019f5c72-4d4c-70ac-a26f-9ad99a3f3e15" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquireIntangibleAssets_019f5c72-4d4c-7d01-b8d9-0cb873d39edb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PaymentsToAcquireIntangibleAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_019f5c72-4d4c-7654-9f27-8e2dea5098f6" xlink:to="loc_us-gaap_PaymentsToAcquireIntangibleAssets_019f5c72-4d4c-7d01-b8d9-0cb873d39edb" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_019f5c72-4d4c-7593-b531-3296de12cc6b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_019f5c72-4d4c-7654-9f27-8e2dea5098f6" xlink:to="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_019f5c72-4d4c-7593-b531-3296de12cc6b" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_019f5c72-4d4c-7710-b1d1-1e3d2ac61d27" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019f5c72-4d4c-782d-8e66-b04a9f4decbe" xlink:to="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_019f5c72-4d4c-7710-b1d1-1e3d2ac61d27" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromLinesOfCredit_019f5c72-4d4c-7c4c-90b6-7187d39c92cd" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProceedsFromLinesOfCredit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_019f5c72-4d4c-7710-b1d1-1e3d2ac61d27" xlink:to="loc_us-gaap_ProceedsFromLinesOfCredit_019f5c72-4d4c-7c4c-90b6-7187d39c92cd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RepaymentsOfLinesOfCredit_019f5c72-4d4c-7473-af18-e950294ff140" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RepaymentsOfLinesOfCredit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_019f5c72-4d4c-7710-b1d1-1e3d2ac61d27" xlink:to="loc_us-gaap_RepaymentsOfLinesOfCredit_019f5c72-4d4c-7473-af18-e950294ff140" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_019f5c72-4d4c-7f24-a170-b9ae516d9d50" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_019f5c72-4d4c-7710-b1d1-1e3d2ac61d27" xlink:to="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_019f5c72-4d4c-7f24-a170-b9ae516d9d50" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_019f5c72-4d4c-7f1d-ab3b-dc53ad315ba3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019f5c72-4d4c-782d-8e66-b04a9f4decbe" xlink:to="loc_us-gaap_EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_019f5c72-4d4c-7f1d-ab3b-dc53ad315ba3" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_019f5c72-4d4c-7d32-a02b-2d828ba0199a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019f5c72-4d4c-782d-8e66-b04a9f4decbe" xlink:to="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_019f5c72-4d4c-7d32-a02b-2d828ba0199a" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_019f5c72-4d4c-749c-a384-faf1ef2e62c9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019f5c72-4d4c-782d-8e66-b04a9f4decbe" xlink:to="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_019f5c72-4d4c-749c-a384-faf1ef2e62c9" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_019f5c72-4d4c-7515-8fcf-8593a095b31d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SupplementalCashFlowInformationAbstract_019f5c72-4d4c-7eea-b33a-c62f1d9cf1d5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SupplementalCashFlowInformationAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019f5c72-4d4c-782d-8e66-b04a9f4decbe" xlink:to="loc_us-gaap_SupplementalCashFlowInformationAbstract_019f5c72-4d4c-7eea-b33a-c62f1d9cf1d5" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestPaidNet_019f5c72-4d4c-75b7-b8d7-288b8ee7b12b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestPaidNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SupplementalCashFlowInformationAbstract_019f5c72-4d4c-7eea-b33a-c62f1d9cf1d5" xlink:to="loc_us-gaap_InterestPaidNet_019f5c72-4d4c-75b7-b8d7-288b8ee7b12b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxesPaidNet_019f5c72-4d4c-7574-b1a3-fc05291450e7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeTaxesPaidNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SupplementalCashFlowInformationAbstract_019f5c72-4d4c-7eea-b33a-c62f1d9cf1d5" xlink:to="loc_us-gaap_IncomeTaxesPaidNet_019f5c72-4d4c-7574-b1a3-fc05291450e7" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract_019f5c72-4d4c-76f4-babc-5882f756a448" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019f5c72-4d4c-782d-8e66-b04a9f4decbe" xlink:to="loc_us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract_019f5c72-4d4c-76f4-babc-5882f756a448" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_fgi_OperatingLeaseRightOfUseAssetActivity_019f5c72-4d4c-704a-9f6a-4c783e151b62" xlink:href="fgi-20260630.xsd#fgi_OperatingLeaseRightOfUseAssetActivity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract_019f5c72-4d4c-76f4-babc-5882f756a448" xlink:to="loc_fgi_OperatingLeaseRightOfUseAssetActivity_019f5c72-4d4c-704a-9f6a-4c783e151b62" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fgi_LeaseTerminationDerecognitionOfRightOfUseAssetAndLeaseLiability_019f5c72-4d4c-746b-bce0-cde26a4e88ac" xlink:href="fgi-20260630.xsd#fgi_LeaseTerminationDerecognitionOfRightOfUseAssetAndLeaseLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract_019f5c72-4d4c-76f4-babc-5882f756a448" xlink:to="loc_fgi_LeaseTerminationDerecognitionOfRightOfUseAssetAndLeaseLiability_019f5c72-4d4c-746b-bce0-cde26a4e88ac" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://fgi-industries.com/role/NatureofbusinessandorganizationDetails" xlink:type="simple" xlink:href="fgi-20260630.xsd#NatureofbusinessandorganizationDetails"/>
  <link:definitionLink xlink:role="http://fgi-industries.com/role/NatureofbusinessandorganizationDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MinorityInterestLineItems_019f5c72-4d4c-7ea0-8d38-69d3adb0965c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MinorityInterestLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MinorityInterestTable_019f5c72-4d4c-7676-950a-e52e4074868a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MinorityInterestTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_MinorityInterestLineItems_019f5c72-4d4c-7ea0-8d38-69d3adb0965c" xlink:to="loc_us-gaap_MinorityInterestTable_019f5c72-4d4c-7676-950a-e52e4074868a" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_019f5c72-4d4c-78f9-b98f-24dba0f06090" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_MinorityInterestTable_019f5c72-4d4c-7676-950a-e52e4074868a" xlink:to="loc_dei_LegalEntityAxis_019f5c72-4d4c-78f9-b98f-24dba0f06090" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019f5c72-4d4c-78f9-b98f-24dba0f06090_default" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_019f5c72-4d4c-78f9-b98f-24dba0f06090" xlink:to="loc_dei_EntityDomain_019f5c72-4d4c-78f9-b98f-24dba0f06090_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019f5c72-4d4c-719c-bb74-8ea75ecc1839" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_019f5c72-4d4c-78f9-b98f-24dba0f06090" xlink:to="loc_dei_EntityDomain_019f5c72-4d4c-719c-bb74-8ea75ecc1839" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fgi_FgiIndustriesInc.Member_019f5c72-4d4c-75e7-bfde-b0946de94e9f" xlink:href="fgi-20260630.xsd#fgi_FgiIndustriesInc.Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019f5c72-4d4c-719c-bb74-8ea75ecc1839" xlink:to="loc_fgi_FgiIndustriesInc.Member_019f5c72-4d4c-75e7-bfde-b0946de94e9f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fgi_FgiEuropeInvestmentLimitedMember_019f5c72-4d4c-7a58-aa03-c5eb57d66f61" xlink:href="fgi-20260630.xsd#fgi_FgiEuropeInvestmentLimitedMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019f5c72-4d4c-719c-bb74-8ea75ecc1839" xlink:to="loc_fgi_FgiEuropeInvestmentLimitedMember_019f5c72-4d4c-7a58-aa03-c5eb57d66f61" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fgi_FgiInternationalLimitedMember_019f5c72-4d4c-7bb2-8b9e-ec907e95f6ad" xlink:href="fgi-20260630.xsd#fgi_FgiInternationalLimitedMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019f5c72-4d4c-719c-bb74-8ea75ecc1839" xlink:to="loc_fgi_FgiInternationalLimitedMember_019f5c72-4d4c-7bb2-8b9e-ec907e95f6ad" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_OwnershipAxis_019f5c72-4d4c-731d-9d9e-cb70187b1fd8" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_OwnershipAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_MinorityInterestTable_019f5c72-4d4c-7676-950a-e52e4074868a" xlink:to="loc_srt_OwnershipAxis_019f5c72-4d4c-731d-9d9e-cb70187b1fd8" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_OwnershipDomain_019f5c72-4d4c-731d-9d9e-cb70187b1fd8_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_OwnershipDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_OwnershipAxis_019f5c72-4d4c-731d-9d9e-cb70187b1fd8" xlink:to="loc_srt_OwnershipDomain_019f5c72-4d4c-731d-9d9e-cb70187b1fd8_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_OwnershipDomain_019f5c72-4d4c-70a1-a0f5-01b9e58bd284" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_OwnershipDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_OwnershipAxis_019f5c72-4d4c-731d-9d9e-cb70187b1fd8" xlink:to="loc_srt_OwnershipDomain_019f5c72-4d4c-70a1-a0f5-01b9e58bd284" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fgi_FgiIndustriesInc.Member_019f5c72-4d4c-7994-b011-59ae49591f48" xlink:href="fgi-20260630.xsd#fgi_FgiIndustriesInc.Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_OwnershipDomain_019f5c72-4d4c-70a1-a0f5-01b9e58bd284" xlink:to="loc_fgi_FgiIndustriesInc.Member_019f5c72-4d4c-7994-b011-59ae49591f48" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fgi_FgiEuropeInvestmentLimitedMember_019f5c72-4d4c-7619-b9a4-3e7118012621" xlink:href="fgi-20260630.xsd#fgi_FgiEuropeInvestmentLimitedMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_OwnershipDomain_019f5c72-4d4c-70a1-a0f5-01b9e58bd284" xlink:to="loc_fgi_FgiEuropeInvestmentLimitedMember_019f5c72-4d4c-7619-b9a4-3e7118012621" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fgi_FgiInternationalLimitedMember_019f5c72-4d4c-778d-a6af-8bf1220adcd7" xlink:href="fgi-20260630.xsd#fgi_FgiInternationalLimitedMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_OwnershipDomain_019f5c72-4d4c-70a1-a0f5-01b9e58bd284" xlink:to="loc_fgi_FgiInternationalLimitedMember_019f5c72-4d4c-778d-a6af-8bf1220adcd7" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_fgi_FgiCanadaLtd.Member_019f5c72-4d4c-71b8-a518-594e42b54a92" xlink:href="fgi-20260630.xsd#fgi_FgiCanadaLtd.Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_OwnershipDomain_019f5c72-4d4c-70a1-a0f5-01b9e58bd284" xlink:to="loc_fgi_FgiCanadaLtd.Member_019f5c72-4d4c-71b8-a518-594e42b54a92" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_fgi_FgiGermanyGmbhCo.KgMember_019f5c72-4d4c-7afc-9e76-57991a5a0829" xlink:href="fgi-20260630.xsd#fgi_FgiGermanyGmbhCo.KgMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_OwnershipDomain_019f5c72-4d4c-70a1-a0f5-01b9e58bd284" xlink:to="loc_fgi_FgiGermanyGmbhCo.KgMember_019f5c72-4d4c-7afc-9e76-57991a5a0829" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_fgi_FgiChinaLtdMember_019f5c72-4d4c-733f-b67c-5277d97b9c60" xlink:href="fgi-20260630.xsd#fgi_FgiChinaLtdMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_OwnershipDomain_019f5c72-4d4c-70a1-a0f5-01b9e58bd284" xlink:to="loc_fgi_FgiChinaLtdMember_019f5c72-4d4c-733f-b67c-5277d97b9c60" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_fgi_FgiUnitedKingdomLtdMember_019f5c72-4d4c-7957-af3e-18a1f485d4f1" xlink:href="fgi-20260630.xsd#fgi_FgiUnitedKingdomLtdMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_OwnershipDomain_019f5c72-4d4c-70a1-a0f5-01b9e58bd284" xlink:to="loc_fgi_FgiUnitedKingdomLtdMember_019f5c72-4d4c-7957-af3e-18a1f485d4f1" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_fgi_FgiAustrlasiaPtyLtdMember_019f5c72-4d4c-7882-90d9-3b410b8dfc3e" xlink:href="fgi-20260630.xsd#fgi_FgiAustrlasiaPtyLtdMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_OwnershipDomain_019f5c72-4d4c-70a1-a0f5-01b9e58bd284" xlink:to="loc_fgi_FgiAustrlasiaPtyLtdMember_019f5c72-4d4c-7882-90d9-3b410b8dfc3e" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_fgi_CoveredBridgeCabinetryManufacturingCo.LtdMember_019f5c72-4d4c-7788-a863-06a161e07a59" xlink:href="fgi-20260630.xsd#fgi_CoveredBridgeCabinetryManufacturingCo.LtdMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_OwnershipDomain_019f5c72-4d4c-70a1-a0f5-01b9e58bd284" xlink:to="loc_fgi_CoveredBridgeCabinetryManufacturingCo.LtdMember_019f5c72-4d4c-7788-a863-06a161e07a59" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_fgi_IslaPorterLlcMember_019f5c72-4d4c-7e7e-a780-2251ac0e0acc" xlink:href="fgi-20260630.xsd#fgi_IslaPorterLlcMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_OwnershipDomain_019f5c72-4d4c-70a1-a0f5-01b9e58bd284" xlink:to="loc_fgi_IslaPorterLlcMember_019f5c72-4d4c-7e7e-a780-2251ac0e0acc" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_fgi_FgiIndustriesIndiaPrivateLimitedMember_019f5c72-4d4c-7db8-8480-ddeb55459be8" xlink:href="fgi-20260630.xsd#fgi_FgiIndustriesIndiaPrivateLimitedMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_OwnershipDomain_019f5c72-4d4c-70a1-a0f5-01b9e58bd284" xlink:to="loc_fgi_FgiIndustriesIndiaPrivateLimitedMember_019f5c72-4d4c-7db8-8480-ddeb55459be8" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MinorityInterestOwnershipPercentageByParent_019f5c72-4d4c-7789-83cb-74f11e018ddb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MinorityInterestOwnershipPercentageByParent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MinorityInterestLineItems_019f5c72-4d4c-7ea0-8d38-69d3adb0965c" xlink:to="loc_us-gaap_MinorityInterestOwnershipPercentageByParent_019f5c72-4d4c-7789-83cb-74f11e018ddb" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://fgi-industries.com/role/SummaryofsignificantaccountingpoliciesPropertyandEquipmentNetDetails" xlink:type="simple" xlink:href="fgi-20260630.xsd#SummaryofsignificantaccountingpoliciesPropertyandEquipmentNetDetails"/>
  <link:definitionLink xlink:role="http://fgi-industries.com/role/SummaryofsignificantaccountingpoliciesPropertyandEquipmentNetDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019f5c72-4d4c-7d6d-88b2-572eeac344f4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_019f5c72-4d4c-7f50-ad56-d5bc177b93d8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfPropertyPlantAndEquipmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019f5c72-4d4c-7d6d-88b2-572eeac344f4" xlink:to="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_019f5c72-4d4c-7f50-ad56-d5bc177b93d8" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_019f5c72-4d4c-7f2f-9ebc-ab1985a98c0e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentByTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_019f5c72-4d4c-7f50-ad56-d5bc177b93d8" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_019f5c72-4d4c-7f2f-9ebc-ab1985a98c0e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019f5c72-4d4c-7f2f-9ebc-ab1985a98c0e_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_019f5c72-4d4c-7f2f-9ebc-ab1985a98c0e" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019f5c72-4d4c-7f2f-9ebc-ab1985a98c0e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019f5c72-4d4c-78c2-9ad0-8848f9e4998e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_019f5c72-4d4c-7f2f-9ebc-ab1985a98c0e" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019f5c72-4d4c-78c2-9ad0-8848f9e4998e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BuildingMember_019f5c72-4d4c-7418-ba35-85cbaf6ef4e5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BuildingMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019f5c72-4d4c-78c2-9ad0-8848f9e4998e" xlink:to="loc_us-gaap_BuildingMember_019f5c72-4d4c-7418-ba35-85cbaf6ef4e5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LeaseholdImprovementsMember_019f5c72-4d4c-732f-ac6e-e96df91eeb7d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LeaseholdImprovementsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019f5c72-4d4c-78c2-9ad0-8848f9e4998e" xlink:to="loc_us-gaap_LeaseholdImprovementsMember_019f5c72-4d4c-732f-ac6e-e96df91eeb7d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MachineryAndEquipmentMember_019f5c72-4d4c-7b3f-a64a-84dbade60cca" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MachineryAndEquipmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019f5c72-4d4c-78c2-9ad0-8848f9e4998e" xlink:to="loc_us-gaap_MachineryAndEquipmentMember_019f5c72-4d4c-7b3f-a64a-84dbade60cca" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FurnitureAndFixturesMember_019f5c72-4d4c-763a-ac47-c11416701dc7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FurnitureAndFixturesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019f5c72-4d4c-78c2-9ad0-8848f9e4998e" xlink:to="loc_us-gaap_FurnitureAndFixturesMember_019f5c72-4d4c-763a-ac47-c11416701dc7" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VehiclesMember_019f5c72-4d4c-7bfc-9e76-f98185d5029c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_VehiclesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019f5c72-4d4c-78c2-9ad0-8848f9e4998e" xlink:to="loc_us-gaap_VehiclesMember_019f5c72-4d4c-7bfc-9e76-f98185d5029c" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ToolsDiesAndMoldsMember_019f5c72-4d4c-74d5-a89a-ba255399cf48" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ToolsDiesAndMoldsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019f5c72-4d4c-78c2-9ad0-8848f9e4998e" xlink:to="loc_us-gaap_ToolsDiesAndMoldsMember_019f5c72-4d4c-74d5-a89a-ba255399cf48" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_019f5c72-4d4c-7735-9d65-6b272fbb649d" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_019f5c72-4d4c-7f50-ad56-d5bc177b93d8" xlink:to="loc_srt_RangeAxis_019f5c72-4d4c-7735-9d65-6b272fbb649d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019f5c72-4d4c-7735-9d65-6b272fbb649d_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_019f5c72-4d4c-7735-9d65-6b272fbb649d" xlink:to="loc_srt_RangeMember_019f5c72-4d4c-7735-9d65-6b272fbb649d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019f5c72-4d4c-7db0-88d9-6f27cd4514be" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_019f5c72-4d4c-7735-9d65-6b272fbb649d" xlink:to="loc_srt_RangeMember_019f5c72-4d4c-7db0-88d9-6f27cd4514be" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_019f5c72-4d4c-73db-a436-864114d5511b" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_019f5c72-4d4c-7db0-88d9-6f27cd4514be" xlink:to="loc_srt_MinimumMember_019f5c72-4d4c-73db-a436-864114d5511b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_019f5c72-4d4c-70f2-8b8f-856e02c7f4d1" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_019f5c72-4d4c-7db0-88d9-6f27cd4514be" xlink:to="loc_srt_MaximumMember_019f5c72-4d4c-70f2-8b8f-856e02c7f4d1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentUsefulLife_019f5c72-4d4c-7717-8a77-d33ab5e080c1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentUsefulLife"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019f5c72-4d4c-7d6d-88b2-572eeac344f4" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentUsefulLife_019f5c72-4d4c-7717-8a77-d33ab5e080c1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentUsefulLifeDescriptionOfTermExtensibleEnumeration_019f5c72-4d4c-72b7-a482-37bb611e83d0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentUsefulLifeDescriptionOfTermExtensibleEnumeration"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019f5c72-4d4c-7d6d-88b2-572eeac344f4" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentUsefulLifeDescriptionOfTermExtensibleEnumeration_019f5c72-4d4c-72b7-a482-37bb611e83d0" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://fgi-industries.com/role/SummaryofsignificantaccountingpoliciesIntangibleAssetsNetDetails" xlink:type="simple" xlink:href="fgi-20260630.xsd#SummaryofsignificantaccountingpoliciesIntangibleAssetsNetDetails"/>
  <link:definitionLink xlink:role="http://fgi-industries.com/role/SummaryofsignificantaccountingpoliciesIntangibleAssetsNetDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_019f5c72-4d4c-7806-bb2d-af9b75e02166" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_019f5c72-4d4c-7d3b-9da5-3911dbff69a0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_019f5c72-4d4c-7806-bb2d-af9b75e02166" xlink:to="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_019f5c72-4d4c-7d3b-9da5-3911dbff69a0" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_019f5c72-4d4c-7756-8079-1a709c5dc719" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_019f5c72-4d4c-7d3b-9da5-3911dbff69a0" xlink:to="loc_srt_RangeAxis_019f5c72-4d4c-7756-8079-1a709c5dc719" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019f5c72-4d4c-7756-8079-1a709c5dc719_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_019f5c72-4d4c-7756-8079-1a709c5dc719" xlink:to="loc_srt_RangeMember_019f5c72-4d4c-7756-8079-1a709c5dc719_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019f5c72-4d4c-79c2-bcf7-a53fd8c5d294" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_019f5c72-4d4c-7756-8079-1a709c5dc719" xlink:to="loc_srt_RangeMember_019f5c72-4d4c-79c2-bcf7-a53fd8c5d294" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_019f5c72-4d4c-7865-ac4c-edce86ca87bc" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_019f5c72-4d4c-79c2-bcf7-a53fd8c5d294" xlink:to="loc_srt_MinimumMember_019f5c72-4d4c-7865-ac4c-edce86ca87bc" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_019f5c72-4d4c-7999-8efe-c73fe903a5ed" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_019f5c72-4d4c-79c2-bcf7-a53fd8c5d294" xlink:to="loc_srt_MaximumMember_019f5c72-4d4c-7999-8efe-c73fe903a5ed" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetUsefulLife_019f5c72-4d4c-7ffd-af61-7d890add0eb8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetUsefulLife"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_019f5c72-4d4c-7806-bb2d-af9b75e02166" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetUsefulLife_019f5c72-4d4c-7ffd-af61-7d890add0eb8" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://fgi-industries.com/role/SummaryofsignificantaccountingpoliciesRevenuesDisaggregationbyProductLineDetails" xlink:type="simple" xlink:href="fgi-20260630.xsd#SummaryofsignificantaccountingpoliciesRevenuesDisaggregationbyProductLineDetails"/>
  <link:definitionLink xlink:role="http://fgi-industries.com/role/SummaryofsignificantaccountingpoliciesRevenuesDisaggregationbyProductLineDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueLineItems_019f5c72-4d4c-7b61-9856-f694b384f16c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DisaggregationOfRevenueLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueTable_019f5c72-4d4c-7649-b9ae-3aab2d9a7299" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DisaggregationOfRevenueTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_019f5c72-4d4c-7b61-9856-f694b384f16c" xlink:to="loc_us-gaap_DisaggregationOfRevenueTable_019f5c72-4d4c-7649-b9ae-3aab2d9a7299" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_019f5c72-4d4c-79e2-b125-7add40ed66d9" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_019f5c72-4d4c-7649-b9ae-3aab2d9a7299" xlink:to="loc_srt_ProductOrServiceAxis_019f5c72-4d4c-79e2-b125-7add40ed66d9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_019f5c72-4d4c-79e2-b125-7add40ed66d9_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_019f5c72-4d4c-79e2-b125-7add40ed66d9" xlink:to="loc_srt_ProductsAndServicesDomain_019f5c72-4d4c-79e2-b125-7add40ed66d9_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_019f5c72-4d4c-7daa-8461-e21eeb1ffc12" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_019f5c72-4d4c-79e2-b125-7add40ed66d9" xlink:to="loc_srt_ProductsAndServicesDomain_019f5c72-4d4c-7daa-8461-e21eeb1ffc12" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fgi_SanitarywareMember_019f5c72-4d4c-7172-944c-7e380e494afd" xlink:href="fgi-20260630.xsd#fgi_SanitarywareMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_019f5c72-4d4c-7daa-8461-e21eeb1ffc12" xlink:to="loc_fgi_SanitarywareMember_019f5c72-4d4c-7172-944c-7e380e494afd" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fgi_BathFurnitureProductsMember_019f5c72-4d4c-74d5-a173-745731b43180" xlink:href="fgi-20260630.xsd#fgi_BathFurnitureProductsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_019f5c72-4d4c-7daa-8461-e21eeb1ffc12" xlink:to="loc_fgi_BathFurnitureProductsMember_019f5c72-4d4c-74d5-a173-745731b43180" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fgi_ShowerSystemMember_019f5c72-4d4c-7ab2-b194-dde19463ce4a" xlink:href="fgi-20260630.xsd#fgi_ShowerSystemMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_019f5c72-4d4c-7daa-8461-e21eeb1ffc12" xlink:to="loc_fgi_ShowerSystemMember_019f5c72-4d4c-7ab2-b194-dde19463ce4a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_fgi_KitchenAndBathOtherMember_019f5c72-4d4c-7de2-ab70-88d31dc33066" xlink:href="fgi-20260630.xsd#fgi_KitchenAndBathOtherMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_019f5c72-4d4c-7daa-8461-e21eeb1ffc12" xlink:to="loc_fgi_KitchenAndBathOtherMember_019f5c72-4d4c-7de2-ab70-88d31dc33066" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_019f5c72-4d4c-7054-802e-83cf7acdbb7f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_019f5c72-4d4c-7b61-9856-f694b384f16c" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_019f5c72-4d4c-7054-802e-83cf7acdbb7f" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://fgi-industries.com/role/SummaryofsignificantaccountingpoliciesRevenuesDisaggregationbyGeographicLocationDetails" xlink:type="simple" xlink:href="fgi-20260630.xsd#SummaryofsignificantaccountingpoliciesRevenuesDisaggregationbyGeographicLocationDetails"/>
  <link:definitionLink xlink:role="http://fgi-industries.com/role/SummaryofsignificantaccountingpoliciesRevenuesDisaggregationbyGeographicLocationDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems_019f5c72-4d4c-774a-a314-ca570ba8e7f4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable_019f5c72-4d4c-72e9-ad37-f994094a4c5f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems_019f5c72-4d4c-774a-a314-ca570ba8e7f4" xlink:to="loc_us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable_019f5c72-4d4c-72e9-ad37-f994094a4c5f" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_StatementGeographicalAxis_019f5c72-4d4c-7d3f-8c5a-67d8fde1d0f6" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_StatementGeographicalAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable_019f5c72-4d4c-72e9-ad37-f994094a4c5f" xlink:to="loc_srt_StatementGeographicalAxis_019f5c72-4d4c-7d3f-8c5a-67d8fde1d0f6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_019f5c72-4d4c-7d3f-8c5a-67d8fde1d0f6_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_SegmentGeographicalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_StatementGeographicalAxis_019f5c72-4d4c-7d3f-8c5a-67d8fde1d0f6" xlink:to="loc_srt_SegmentGeographicalDomain_019f5c72-4d4c-7d3f-8c5a-67d8fde1d0f6_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_019f5c72-4d4c-7942-a8e7-4718e29ef8ff" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_SegmentGeographicalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_StatementGeographicalAxis_019f5c72-4d4c-7d3f-8c5a-67d8fde1d0f6" xlink:to="loc_srt_SegmentGeographicalDomain_019f5c72-4d4c-7942-a8e7-4718e29ef8ff" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_US_019f5c72-4d4c-792a-b8f9-eaf056050b5a" xlink:href="https://xbrl.sec.gov/country/2025/country-2025.xsd#country_US"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_019f5c72-4d4c-7942-a8e7-4718e29ef8ff" xlink:to="loc_country_US_019f5c72-4d4c-792a-b8f9-eaf056050b5a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_CA_019f5c72-4d4c-71b9-b02c-506f3f54b69c" xlink:href="https://xbrl.sec.gov/country/2025/country-2025.xsd#country_CA"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_019f5c72-4d4c-7942-a8e7-4718e29ef8ff" xlink:to="loc_country_CA_019f5c72-4d4c-71b9-b02c-506f3f54b69c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_EuropeMember_019f5c72-4d4c-7e3a-9f29-bd2181958fac" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_EuropeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_019f5c72-4d4c-7942-a8e7-4718e29ef8ff" xlink:to="loc_srt_EuropeMember_019f5c72-4d4c-7e3a-9f29-bd2181958fac" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_fgi_CountriesOtherThanUnitedStatesCanadaAndEuropeMember_019f5c72-4d4c-7f9a-9d7b-d2c80c5d6979" xlink:href="fgi-20260630.xsd#fgi_CountriesOtherThanUnitedStatesCanadaAndEuropeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_019f5c72-4d4c-7942-a8e7-4718e29ef8ff" xlink:to="loc_fgi_CountriesOtherThanUnitedStatesCanadaAndEuropeMember_019f5c72-4d4c-7f9a-9d7b-d2c80c5d6979" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_019f5c72-4d4c-75e2-9183-38072fdba53c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems_019f5c72-4d4c-774a-a314-ca570ba8e7f4" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_019f5c72-4d4c-75e2-9183-38072fdba53c" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://fgi-industries.com/role/SummaryofsignificantaccountingpoliciesAssetsbyGeographicLocationDetails" xlink:type="simple" xlink:href="fgi-20260630.xsd#SummaryofsignificantaccountingpoliciesAssetsbyGeographicLocationDetails"/>
  <link:definitionLink xlink:role="http://fgi-industries.com/role/SummaryofsignificantaccountingpoliciesAssetsbyGeographicLocationDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems_019f5c72-4d4c-703e-bb48-f156d3768ce0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable_019f5c72-4d4c-72e8-b977-7e729fbf30c6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems_019f5c72-4d4c-703e-bb48-f156d3768ce0" xlink:to="loc_us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable_019f5c72-4d4c-72e8-b977-7e729fbf30c6" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_StatementGeographicalAxis_019f5c72-4d4c-791e-9b37-d11ce9a5716b" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_StatementGeographicalAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable_019f5c72-4d4c-72e8-b977-7e729fbf30c6" xlink:to="loc_srt_StatementGeographicalAxis_019f5c72-4d4c-791e-9b37-d11ce9a5716b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_019f5c72-4d4c-791e-9b37-d11ce9a5716b_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_SegmentGeographicalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_StatementGeographicalAxis_019f5c72-4d4c-791e-9b37-d11ce9a5716b" xlink:to="loc_srt_SegmentGeographicalDomain_019f5c72-4d4c-791e-9b37-d11ce9a5716b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_019f5c72-4d4c-7bf8-b05d-8a7ca725e58c" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_SegmentGeographicalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_StatementGeographicalAxis_019f5c72-4d4c-791e-9b37-d11ce9a5716b" xlink:to="loc_srt_SegmentGeographicalDomain_019f5c72-4d4c-7bf8-b05d-8a7ca725e58c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_US_019f5c72-4d4c-7ca1-a644-f09e6fc0afd4" xlink:href="https://xbrl.sec.gov/country/2025/country-2025.xsd#country_US"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_019f5c72-4d4c-7bf8-b05d-8a7ca725e58c" xlink:to="loc_country_US_019f5c72-4d4c-7ca1-a644-f09e6fc0afd4" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_CA_019f5c72-4d4c-7832-8ee4-800617f9f0d8" xlink:href="https://xbrl.sec.gov/country/2025/country-2025.xsd#country_CA"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_019f5c72-4d4c-7bf8-b05d-8a7ca725e58c" xlink:to="loc_country_CA_019f5c72-4d4c-7832-8ee4-800617f9f0d8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_EuropeMember_019f5c72-4d4c-7206-a187-df462ca06f0c" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_EuropeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_019f5c72-4d4c-7bf8-b05d-8a7ca725e58c" xlink:to="loc_srt_EuropeMember_019f5c72-4d4c-7206-a187-df462ca06f0c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_fgi_CountriesOtherThanUnitedStatesCanadaAndEuropeMember_019f5c72-4d4c-722d-901a-68eca54daaf4" xlink:href="fgi-20260630.xsd#fgi_CountriesOtherThanUnitedStatesCanadaAndEuropeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_019f5c72-4d4c-7bf8-b05d-8a7ca725e58c" xlink:to="loc_fgi_CountriesOtherThanUnitedStatesCanadaAndEuropeMember_019f5c72-4d4c-722d-901a-68eca54daaf4" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Assets_019f5c72-4d4c-7544-8267-bc0caeecce40" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_Assets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems_019f5c72-4d4c-703e-bb48-f156d3768ce0" xlink:to="loc_us-gaap_Assets_019f5c72-4d4c-7544-8267-bc0caeecce40" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://fgi-industries.com/role/SummaryofsignificantaccountingpoliciesNoncontrollingInterestsDetails" xlink:type="simple" xlink:href="fgi-20260630.xsd#SummaryofsignificantaccountingpoliciesNoncontrollingInterestsDetails"/>
  <link:definitionLink xlink:role="http://fgi-industries.com/role/SummaryofsignificantaccountingpoliciesNoncontrollingInterestsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MinorityInterestLineItems_019f5c72-4d4c-7d35-81b4-1f2239c6641b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MinorityInterestLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MinorityInterestTable_019f5c72-4d4c-7b19-b6e5-c38630788c9e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MinorityInterestTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_MinorityInterestLineItems_019f5c72-4d4c-7d35-81b4-1f2239c6641b" xlink:to="loc_us-gaap_MinorityInterestTable_019f5c72-4d4c-7b19-b6e5-c38630788c9e" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_OwnershipAxis_019f5c72-4d4c-7e16-86a1-8ccbe50a8f9c" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_OwnershipAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_MinorityInterestTable_019f5c72-4d4c-7b19-b6e5-c38630788c9e" xlink:to="loc_srt_OwnershipAxis_019f5c72-4d4c-7e16-86a1-8ccbe50a8f9c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_OwnershipDomain_019f5c72-4d4c-7e16-86a1-8ccbe50a8f9c_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_OwnershipDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_OwnershipAxis_019f5c72-4d4c-7e16-86a1-8ccbe50a8f9c" xlink:to="loc_srt_OwnershipDomain_019f5c72-4d4c-7e16-86a1-8ccbe50a8f9c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_OwnershipDomain_019f5c72-4d4c-73ca-8c78-8ddf9fa4ce58" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_OwnershipDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_OwnershipAxis_019f5c72-4d4c-7e16-86a1-8ccbe50a8f9c" xlink:to="loc_srt_OwnershipDomain_019f5c72-4d4c-73ca-8c78-8ddf9fa4ce58" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fgi_IslaPorterLlcMember_019f5c72-4d4c-701e-85fb-d84646c95dcf" xlink:href="fgi-20260630.xsd#fgi_IslaPorterLlcMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_OwnershipDomain_019f5c72-4d4c-73ca-8c78-8ddf9fa4ce58" xlink:to="loc_fgi_IslaPorterLlcMember_019f5c72-4d4c-701e-85fb-d84646c95dcf" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners_019f5c72-4d4c-7354-ac3a-b471b5b48f67" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MinorityInterestLineItems_019f5c72-4d4c-7d35-81b4-1f2239c6641b" xlink:to="loc_us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners_019f5c72-4d4c-7354-ac3a-b471b5b48f67" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://fgi-industries.com/role/PrepaymentsandotherassetsDetails" xlink:type="simple" xlink:href="fgi-20260630.xsd#PrepaymentsandotherassetsDetails"/>
  <link:definitionLink xlink:role="http://fgi-industries.com/role/PrepaymentsandotherassetsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_fgi_PrepaidExpensesAndOtherAssetsLineItems_019f5c72-4d4c-7f70-938b-66e9b4e049ed" xlink:href="fgi-20260630.xsd#fgi_PrepaidExpensesAndOtherAssetsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_fgi_PrepaidExpensesAndOtherAssetsTable_019f5c72-4d4c-7e5b-9675-c36095267ea6" xlink:href="fgi-20260630.xsd#fgi_PrepaidExpensesAndOtherAssetsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_fgi_PrepaidExpensesAndOtherAssetsLineItems_019f5c72-4d4c-7f70-938b-66e9b4e049ed" xlink:to="loc_fgi_PrepaidExpensesAndOtherAssetsTable_019f5c72-4d4c-7e5b-9675-c36095267ea6" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019f5c72-4d4c-78ea-88c2-2460d057f8cc" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_fgi_PrepaidExpensesAndOtherAssetsTable_019f5c72-4d4c-7e5b-9675-c36095267ea6" xlink:to="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019f5c72-4d4c-78ea-88c2-2460d057f8cc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_019f5c72-4d4c-78ea-88c2-2460d057f8cc_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019f5c72-4d4c-78ea-88c2-2460d057f8cc" xlink:to="loc_us-gaap_RelatedPartyDomain_019f5c72-4d4c-78ea-88c2-2460d057f8cc_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_019f5c72-4d4c-7a39-ba6d-bbc73685db70" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019f5c72-4d4c-78ea-88c2-2460d057f8cc" xlink:to="loc_us-gaap_RelatedPartyDomain_019f5c72-4d4c-7a39-ba6d-bbc73685db70" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NonrelatedPartyMember_019f5c72-4d4c-7acf-99c7-75a37748c4fd" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NonrelatedPartyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyDomain_019f5c72-4d4c-7a39-ba6d-bbc73685db70" xlink:to="loc_us-gaap_NonrelatedPartyMember_019f5c72-4d4c-7acf-99c7-75a37748c4fd" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PrepaidExpenseCurrent_019f5c72-4d4c-76f6-bcf8-a58ecaca75fb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PrepaidExpenseCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fgi_PrepaidExpensesAndOtherAssetsLineItems_019f5c72-4d4c-7f70-938b-66e9b4e049ed" xlink:to="loc_us-gaap_PrepaidExpenseCurrent_019f5c72-4d4c-76f6-bcf8-a58ecaca75fb" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAssetsCurrent_019f5c72-4d4c-7f95-b8f4-a9ebe512df4e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherAssetsCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fgi_PrepaidExpensesAndOtherAssetsLineItems_019f5c72-4d4c-7f70-938b-66e9b4e049ed" xlink:to="loc_us-gaap_OtherAssetsCurrent_019f5c72-4d4c-7f95-b8f4-a9ebe512df4e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PrepaidExpenseAndOtherAssetsCurrent_019f5c72-4d4c-77e4-9d05-b164ba67c5a1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PrepaidExpenseAndOtherAssetsCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fgi_PrepaidExpensesAndOtherAssetsLineItems_019f5c72-4d4c-7f70-938b-66e9b4e049ed" xlink:to="loc_us-gaap_PrepaidExpenseAndOtherAssetsCurrent_019f5c72-4d4c-77e4-9d05-b164ba67c5a1" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://fgi-industries.com/role/PropertyandequipmentnetPropertyandEquipmentnetDetails" xlink:type="simple" xlink:href="fgi-20260630.xsd#PropertyandequipmentnetPropertyandEquipmentnetDetails"/>
  <link:definitionLink xlink:role="http://fgi-industries.com/role/PropertyandequipmentnetPropertyandEquipmentnetDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019f5c72-4df1-7751-870e-295dcfa04a3d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_019f5c72-4d4c-748a-a250-b532b611322f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfPropertyPlantAndEquipmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019f5c72-4df1-7751-870e-295dcfa04a3d" xlink:to="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_019f5c72-4d4c-748a-a250-b532b611322f" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_019f5c72-4d4c-70aa-b8f2-d9264c5387e7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentByTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_019f5c72-4d4c-748a-a250-b532b611322f" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_019f5c72-4d4c-70aa-b8f2-d9264c5387e7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019f5c72-4d4c-70aa-b8f2-d9264c5387e7_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_019f5c72-4d4c-70aa-b8f2-d9264c5387e7" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019f5c72-4d4c-70aa-b8f2-d9264c5387e7_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019f5c72-4d4c-75ad-ab3c-4eee62888d22" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_019f5c72-4d4c-70aa-b8f2-d9264c5387e7" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019f5c72-4d4c-75ad-ab3c-4eee62888d22" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BuildingMember_019f5c72-4d4c-711f-afc4-cf0bed32ab61" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BuildingMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019f5c72-4d4c-75ad-ab3c-4eee62888d22" xlink:to="loc_us-gaap_BuildingMember_019f5c72-4d4c-711f-afc4-cf0bed32ab61" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LeaseholdImprovementsMember_019f5c72-4df1-7a93-b0e4-b667d3f97117" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LeaseholdImprovementsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019f5c72-4d4c-75ad-ab3c-4eee62888d22" xlink:to="loc_us-gaap_LeaseholdImprovementsMember_019f5c72-4df1-7a93-b0e4-b667d3f97117" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MachineryAndEquipmentMember_019f5c72-4df1-76e4-b858-83bd996f9eba" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MachineryAndEquipmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019f5c72-4d4c-75ad-ab3c-4eee62888d22" xlink:to="loc_us-gaap_MachineryAndEquipmentMember_019f5c72-4df1-76e4-b858-83bd996f9eba" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FurnitureAndFixturesMember_019f5c72-4df1-79c1-b05a-31dd1593e9f9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FurnitureAndFixturesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019f5c72-4d4c-75ad-ab3c-4eee62888d22" xlink:to="loc_us-gaap_FurnitureAndFixturesMember_019f5c72-4df1-79c1-b05a-31dd1593e9f9" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VehiclesMember_019f5c72-4df1-7173-ac9f-4cb9465e3d2d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_VehiclesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019f5c72-4d4c-75ad-ab3c-4eee62888d22" xlink:to="loc_us-gaap_VehiclesMember_019f5c72-4df1-7173-ac9f-4cb9465e3d2d" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ToolsDiesAndMoldsMember_019f5c72-4df1-7faa-9099-b44dd9b2e416" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ToolsDiesAndMoldsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019f5c72-4d4c-75ad-ab3c-4eee62888d22" xlink:to="loc_us-gaap_ToolsDiesAndMoldsMember_019f5c72-4df1-7faa-9099-b44dd9b2e416" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentGross_019f5c72-4df1-73c0-b681-b57f9a25193f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019f5c72-4df1-7751-870e-295dcfa04a3d" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentGross_019f5c72-4df1-73c0-b681-b57f9a25193f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fgi_PropertyPlantAndEquipmentPrepaymentForPurchaseOfEquipmentAndConstructionInProgress_019fea1e-6ec5-72f8-a300-c04d4cb7e64a" xlink:href="fgi-20260630.xsd#fgi_PropertyPlantAndEquipmentPrepaymentForPurchaseOfEquipmentAndConstructionInProgress"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019f5c72-4df1-7751-870e-295dcfa04a3d" xlink:to="loc_fgi_PropertyPlantAndEquipmentPrepaymentForPurchaseOfEquipmentAndConstructionInProgress_019fea1e-6ec5-72f8-a300-c04d4cb7e64a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_019f5c72-4df1-79b5-97d1-35559cb36848" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019f5c72-4df1-7751-870e-295dcfa04a3d" xlink:to="loc_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_019f5c72-4df1-79b5-97d1-35559cb36848" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentNet_019f5c72-4df1-7faa-94db-ec0ea458c487" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019f5c72-4df1-7751-870e-295dcfa04a3d" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentNet_019f5c72-4df1-7faa-94db-ec0ea458c487" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://fgi-industries.com/role/IntangibleAssetsNetScheduleofIntangibleAssetsDetails" xlink:type="simple" xlink:href="fgi-20260630.xsd#IntangibleAssetsNetScheduleofIntangibleAssetsDetails"/>
  <link:definitionLink xlink:role="http://fgi-industries.com/role/IntangibleAssetsNetScheduleofIntangibleAssetsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_019f5c72-4df1-7502-b098-df47f263f124" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_019f5c72-4df1-7447-8dfe-b8a28bfc39a9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_019f5c72-4df1-7502-b098-df47f263f124" xlink:to="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_019f5c72-4df1-7447-8dfe-b8a28bfc39a9" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_019f5c72-4df1-7448-909c-43981e6015de" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_019f5c72-4df1-7447-8dfe-b8a28bfc39a9" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_019f5c72-4df1-7448-909c-43981e6015de" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019f5c72-4df1-7448-909c-43981e6015de_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_019f5c72-4df1-7448-909c-43981e6015de" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019f5c72-4df1-7448-909c-43981e6015de_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019f5c72-4df1-70e0-a361-b9c732d2107a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_019f5c72-4df1-7448-909c-43981e6015de" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019f5c72-4df1-70e0-a361-b9c732d2107a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SoftwareAndSoftwareDevelopmentCostsMember_019f5c72-4df1-7b9a-bc2b-7202bf7c8e79" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SoftwareAndSoftwareDevelopmentCostsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019f5c72-4df1-70e0-a361-b9c732d2107a" xlink:to="loc_us-gaap_SoftwareAndSoftwareDevelopmentCostsMember_019f5c72-4df1-7b9a-bc2b-7202bf7c8e79" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationAxis_019f5c72-4df1-7c9b-b00a-f281d8bbe465" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeStatementLocationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_019f5c72-4df1-7447-8dfe-b8a28bfc39a9" xlink:to="loc_us-gaap_IncomeStatementLocationAxis_019f5c72-4df1-7c9b-b00a-f281d8bbe465" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_019f5c72-4df1-7c9b-b00a-f281d8bbe465_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeStatementLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_019f5c72-4df1-7c9b-b00a-f281d8bbe465" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_019f5c72-4df1-7c9b-b00a-f281d8bbe465_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_019f5c72-4df1-798e-b5a7-68eb65e69321" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeStatementLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_019f5c72-4df1-7c9b-b00a-f281d8bbe465" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_019f5c72-4df1-798e-b5a7-68eb65e69321" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SellingGeneralAndAdministrativeExpensesMember_019f5c72-4df1-70bc-b100-5a0f2a6b3c96" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SellingGeneralAndAdministrativeExpensesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_019f5c72-4df1-798e-b5a7-68eb65e69321" xlink:to="loc_us-gaap_SellingGeneralAndAdministrativeExpensesMember_019f5c72-4df1-70bc-b100-5a0f2a6b3c96" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsGross_019f5c72-4df1-71e5-9f92-bb7648594387" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_019f5c72-4df1-7502-b098-df47f263f124" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsGross_019f5c72-4df1-71e5-9f92-bb7648594387" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_019f5c72-4df1-7802-be11-e256a737e090" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_019f5c72-4df1-7502-b098-df47f263f124" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_019f5c72-4df1-7802-be11-e256a737e090" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsNet_019f5c72-4df1-7366-81f3-c18fb76b56e0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_019f5c72-4df1-7502-b098-df47f263f124" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsNet_019f5c72-4df1-7366-81f3-c18fb76b56e0" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetUsefulLife_019f5c72-4df1-78fb-90bd-7755c9fe9152" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetUsefulLife"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_019f5c72-4df1-7502-b098-df47f263f124" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetUsefulLife_019f5c72-4df1-78fb-90bd-7755c9fe9152" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AmortizationOfIntangibleAssets_019f5c72-4df1-7570-ad53-864cb56975f3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AmortizationOfIntangibleAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_019f5c72-4df1-7502-b098-df47f263f124" xlink:to="loc_us-gaap_AmortizationOfIntangibleAssets_019f5c72-4df1-7570-ad53-864cb56975f3" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://fgi-industries.com/role/ShorttermloansDetails" xlink:type="simple" xlink:href="fgi-20260630.xsd#ShorttermloansDetails"/>
  <link:definitionLink xlink:role="http://fgi-industries.com/role/ShorttermloansDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShortTermDebtLineItems_019f5c72-4df1-7304-91d2-85ce678fc16b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShortTermDebtLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShortTermDebtTable_019f5c72-4df1-70ff-9554-0321b73dabb2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfShortTermDebtTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShortTermDebtLineItems_019f5c72-4df1-7304-91d2-85ce678fc16b" xlink:to="loc_us-gaap_ScheduleOfShortTermDebtTable_019f5c72-4df1-70ff-9554-0321b73dabb2" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_019f5c72-4df1-7b6e-a5af-3b0f9d3b2566" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShortTermDebtTable_019f5c72-4df1-70ff-9554-0321b73dabb2" xlink:to="loc_dei_LegalEntityAxis_019f5c72-4df1-7b6e-a5af-3b0f9d3b2566" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019f5c72-4df1-7b6e-a5af-3b0f9d3b2566_default" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_019f5c72-4df1-7b6e-a5af-3b0f9d3b2566" xlink:to="loc_dei_EntityDomain_019f5c72-4df1-7b6e-a5af-3b0f9d3b2566_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019f5c72-4df1-74d3-9c66-44184f37de7d" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_019f5c72-4df1-7b6e-a5af-3b0f9d3b2566" xlink:to="loc_dei_EntityDomain_019f5c72-4df1-74d3-9c66-44184f37de7d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fgi_Mr.LiangChouChenMember_019f5c72-4df1-7fbb-975b-14c6959121be" xlink:href="fgi-20260630.xsd#fgi_Mr.LiangChouChenMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019f5c72-4df1-74d3-9c66-44184f37de7d" xlink:to="loc_fgi_Mr.LiangChouChenMember_019f5c72-4df1-7fbb-975b-14c6959121be" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_OwnershipAxis_019f5c72-4df1-7c2f-a41c-3e7c0f85ca0b" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_OwnershipAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShortTermDebtTable_019f5c72-4df1-70ff-9554-0321b73dabb2" xlink:to="loc_srt_OwnershipAxis_019f5c72-4df1-7c2f-a41c-3e7c0f85ca0b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_OwnershipDomain_019f5c72-4df1-7c2f-a41c-3e7c0f85ca0b_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_OwnershipDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_OwnershipAxis_019f5c72-4df1-7c2f-a41c-3e7c0f85ca0b" xlink:to="loc_srt_OwnershipDomain_019f5c72-4df1-7c2f-a41c-3e7c0f85ca0b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_OwnershipDomain_019f5c72-4df1-7a40-9057-50ef3e8554c6" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_OwnershipDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_OwnershipAxis_019f5c72-4df1-7c2f-a41c-3e7c0f85ca0b" xlink:to="loc_srt_OwnershipDomain_019f5c72-4df1-7a40-9057-50ef3e8554c6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fgi_ForemostGroupsLtd.Member_019f5c72-4df1-7c03-9b80-460e1346df74" xlink:href="fgi-20260630.xsd#fgi_ForemostGroupsLtd.Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_OwnershipDomain_019f5c72-4df1-7a40-9057-50ef3e8554c6" xlink:to="loc_fgi_ForemostGroupsLtd.Member_019f5c72-4df1-7c03-9b80-460e1346df74" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShortTermDebtTypeAxis_019f5c72-4df1-7f39-95b0-2235230038a9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShortTermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShortTermDebtTable_019f5c72-4df1-70ff-9554-0321b73dabb2" xlink:to="loc_us-gaap_ShortTermDebtTypeAxis_019f5c72-4df1-7f39-95b0-2235230038a9" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShortTermDebtTypeDomain_019f5c72-4df1-7f39-95b0-2235230038a9_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShortTermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ShortTermDebtTypeAxis_019f5c72-4df1-7f39-95b0-2235230038a9" xlink:to="loc_us-gaap_ShortTermDebtTypeDomain_019f5c72-4df1-7f39-95b0-2235230038a9_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShortTermDebtTypeDomain_019f5c72-4df1-7180-9415-3731cb176210" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShortTermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ShortTermDebtTypeAxis_019f5c72-4df1-7f39-95b0-2235230038a9" xlink:to="loc_us-gaap_ShortTermDebtTypeDomain_019f5c72-4df1-7180-9415-3731cb176210" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditMember_019f5c72-4df1-7967-88c1-575230b5ba26" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermDebtTypeDomain_019f5c72-4df1-7180-9415-3731cb176210" xlink:to="loc_us-gaap_LineOfCreditMember_019f5c72-4df1-7967-88c1-575230b5ba26" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_019f5c72-4df1-7a53-80d1-4dcb60c7ffa0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShortTermDebtTable_019f5c72-4df1-70ff-9554-0321b73dabb2" xlink:to="loc_us-gaap_DebtInstrumentAxis_019f5c72-4df1-7a53-80d1-4dcb60c7ffa0" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019f5c72-4df1-7a53-80d1-4dcb60c7ffa0_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_019f5c72-4df1-7a53-80d1-4dcb60c7ffa0" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019f5c72-4df1-7a53-80d1-4dcb60c7ffa0_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019f5c72-4df1-7fd8-b215-d1568e758232" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_019f5c72-4df1-7a53-80d1-4dcb60c7ffa0" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019f5c72-4df1-7fd8-b215-d1568e758232" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fgi_NonDiscretionaryLineOfCreditMember_019f5c72-4df1-7ff2-a08e-5520ac3ffaea" xlink:href="fgi-20260630.xsd#fgi_NonDiscretionaryLineOfCreditMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019f5c72-4df1-7fd8-b215-d1568e758232" xlink:to="loc_fgi_NonDiscretionaryLineOfCreditMember_019f5c72-4df1-7ff2-a08e-5520ac3ffaea" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fgi_DiscretionaryLineOfCreditMember_019f5c72-4df1-72c1-b913-2f5ddd1d38ad" xlink:href="fgi-20260630.xsd#fgi_DiscretionaryLineOfCreditMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019f5c72-4df1-7fd8-b215-d1568e758232" xlink:to="loc_fgi_DiscretionaryLineOfCreditMember_019f5c72-4df1-72c1-b913-2f5ddd1d38ad" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fgi_RevolvingForeignExchangeFacilityMember_019f5c72-4df1-7a03-a3dd-dd5ccbde7eec" xlink:href="fgi-20260630.xsd#fgi_RevolvingForeignExchangeFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019f5c72-4df1-7fd8-b215-d1568e758232" xlink:to="loc_fgi_RevolvingForeignExchangeFacilityMember_019f5c72-4df1-7a03-a3dd-dd5ccbde7eec" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_fgi_CtbcBankCoLtdOmnibusCreditLineMember_019f5c72-4df1-7fa5-b656-359aaa2a51be" xlink:href="fgi-20260630.xsd#fgi_CtbcBankCoLtdOmnibusCreditLineMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019f5c72-4df1-7fd8-b215-d1568e758232" xlink:to="loc_fgi_CtbcBankCoLtdOmnibusCreditLineMember_019f5c72-4df1-7fa5-b656-359aaa2a51be" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_019f5c72-4df1-7f86-85d4-7679a27d21c0" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShortTermDebtTable_019f5c72-4df1-70ff-9554-0321b73dabb2" xlink:to="loc_srt_RangeAxis_019f5c72-4df1-7f86-85d4-7679a27d21c0" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019f5c72-4df1-7f86-85d4-7679a27d21c0_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_019f5c72-4df1-7f86-85d4-7679a27d21c0" xlink:to="loc_srt_RangeMember_019f5c72-4df1-7f86-85d4-7679a27d21c0_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019f5c72-4df1-7b9d-a6fd-d1863f5b3a5c" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_019f5c72-4df1-7f86-85d4-7679a27d21c0" xlink:to="loc_srt_RangeMember_019f5c72-4df1-7b9d-a6fd-d1863f5b3a5c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_019f5c72-4df1-72f5-a5f4-b63771bbdbd4" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_019f5c72-4df1-7b9d-a6fd-d1863f5b3a5c" xlink:to="loc_srt_MinimumMember_019f5c72-4df1-72f5-a5f4-b63771bbdbd4" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_019fea17-0d21-797e-984f-bf2c80d05147" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_019f5c72-4df1-7b9d-a6fd-d1863f5b3a5c" xlink:to="loc_srt_MaximumMember_019fea17-0d21-797e-984f-bf2c80d05147" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MinorityInterestOwnershipPercentageByParent_019f5c72-4df1-7a5b-ba25-9cc7ec177026" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MinorityInterestOwnershipPercentageByParent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermDebtLineItems_019f5c72-4df1-7304-91d2-85ce678fc16b" xlink:to="loc_us-gaap_MinorityInterestOwnershipPercentageByParent_019f5c72-4df1-7a5b-ba25-9cc7ec177026" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_019f5c72-4df1-70eb-89e8-e12ff6ea8dd3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermDebtLineItems_019f5c72-4df1-7304-91d2-85ce678fc16b" xlink:to="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_019f5c72-4df1-70eb-89e8-e12ff6ea8dd3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fgi_LineOfCreditFacilityThresholdDebtToTangibleNetWorthRatio_019f5c72-4df1-7f93-9791-ef7cccfeebcb" xlink:href="fgi-20260630.xsd#fgi_LineOfCreditFacilityThresholdDebtToTangibleNetWorthRatio"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermDebtLineItems_019f5c72-4df1-7304-91d2-85ce678fc16b" xlink:to="loc_fgi_LineOfCreditFacilityThresholdDebtToTangibleNetWorthRatio_019f5c72-4df1-7f93-9791-ef7cccfeebcb" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_019f5c72-4df1-7538-ade3-c0d5d14ba9e3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentBasisSpreadOnVariableRate1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermDebtLineItems_019f5c72-4df1-7304-91d2-85ce678fc16b" xlink:to="loc_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_019f5c72-4df1-7538-ade3-c0d5d14ba9e3" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_019f5c72-4df1-7bed-8052-0986de7a35d8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermDebtLineItems_019f5c72-4df1-7304-91d2-85ce678fc16b" xlink:to="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_019f5c72-4df1-7bed-8052-0986de7a35d8" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShortTermBorrowings_019f5c72-4df1-7a2a-a412-c1972f3269e7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShortTermBorrowings"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermDebtLineItems_019f5c72-4df1-7304-91d2-85ce678fc16b" xlink:to="loc_us-gaap_ShortTermBorrowings_019f5c72-4df1-7a2a-a412-c1972f3269e7" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_fgi_LineOfCreditFacilityCovenantComplianceCurrentRatio_019f5c72-4df1-7c5f-a0c5-6e4c68b93279" xlink:href="fgi-20260630.xsd#fgi_LineOfCreditFacilityCovenantComplianceCurrentRatio"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermDebtLineItems_019f5c72-4df1-7304-91d2-85ce678fc16b" xlink:to="loc_fgi_LineOfCreditFacilityCovenantComplianceCurrentRatio_019f5c72-4df1-7c5f-a0c5-6e4c68b93279" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_fgi_LineOfCreditFacilityExpirationNoticePeriod_019f5c72-4df1-79ae-836c-832ab0b0943f" xlink:href="fgi-20260630.xsd#fgi_LineOfCreditFacilityExpirationNoticePeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermDebtLineItems_019f5c72-4df1-7304-91d2-85ce678fc16b" xlink:to="loc_fgi_LineOfCreditFacilityExpirationNoticePeriod_019f5c72-4df1-79ae-836c-832ab0b0943f" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_fgi_LineOfCreditFacilityMaximumBorrowingCapacityBorrowingLimitPercentageOfExportOpenAccountTradeReceivables_019f5c72-4df1-7c03-95da-0d07bb4c393b" xlink:href="fgi-20260630.xsd#fgi_LineOfCreditFacilityMaximumBorrowingCapacityBorrowingLimitPercentageOfExportOpenAccountTradeReceivables"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermDebtLineItems_019f5c72-4df1-7304-91d2-85ce678fc16b" xlink:to="loc_fgi_LineOfCreditFacilityMaximumBorrowingCapacityBorrowingLimitPercentageOfExportOpenAccountTradeReceivables_019f5c72-4df1-7c03-95da-0d07bb4c393b" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_fgi_DebtInstrumentCovenantComplianceEBITDAConsolidatedBasis_019f5c72-4df1-75e2-a2bd-5caa7ced26f0" xlink:href="fgi-20260630.xsd#fgi_DebtInstrumentCovenantComplianceEBITDAConsolidatedBasis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermDebtLineItems_019f5c72-4df1-7304-91d2-85ce678fc16b" xlink:to="loc_fgi_DebtInstrumentCovenantComplianceEBITDAConsolidatedBasis_019f5c72-4df1-75e2-a2bd-5caa7ced26f0" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_fgi_DebtInstrumentCovenantComplianceEBITDAUnconsolidatedBasis_019f5c72-4df1-72d7-a411-86662b9d6408" xlink:href="fgi-20260630.xsd#fgi_DebtInstrumentCovenantComplianceEBITDAUnconsolidatedBasis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermDebtLineItems_019f5c72-4df1-7304-91d2-85ce678fc16b" xlink:to="loc_fgi_DebtInstrumentCovenantComplianceEBITDAUnconsolidatedBasis_019f5c72-4df1-72d7-a411-86662b9d6408" xlink:type="arc" order="10"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://fgi-industries.com/role/ShareholdersEquityDetails" xlink:type="simple" xlink:href="fgi-20260630.xsd#ShareholdersEquityDetails"/>
  <link:definitionLink xlink:role="http://fgi-industries.com/role/ShareholdersEquityDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfWarrantOrRightLineItems_019f5c72-4df1-78cd-87e1-96b984464624" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfWarrantOrRightLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfWarrantOrRightTable_019f5c72-4df1-7c22-83cd-828166aab2f4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfWarrantOrRightTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ClassOfWarrantOrRightLineItems_019f5c72-4df1-78cd-87e1-96b984464624" xlink:to="loc_us-gaap_ClassOfWarrantOrRightTable_019f5c72-4df1-7c22-83cd-828166aab2f4" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfWarrantOrRightAxis_019f5c72-4df1-764d-bdaa-516c81e8e16a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfWarrantOrRightAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ClassOfWarrantOrRightTable_019f5c72-4df1-7c22-83cd-828166aab2f4" xlink:to="loc_us-gaap_ClassOfWarrantOrRightAxis_019f5c72-4df1-764d-bdaa-516c81e8e16a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfWarrantOrRightDomain_019f5c72-4df1-764d-bdaa-516c81e8e16a_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfWarrantOrRightDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ClassOfWarrantOrRightAxis_019f5c72-4df1-764d-bdaa-516c81e8e16a" xlink:to="loc_us-gaap_ClassOfWarrantOrRightDomain_019f5c72-4df1-764d-bdaa-516c81e8e16a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfWarrantOrRightDomain_019f5c72-4df1-7b3f-b624-b17cdbfd2627" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfWarrantOrRightDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ClassOfWarrantOrRightAxis_019f5c72-4df1-764d-bdaa-516c81e8e16a" xlink:to="loc_us-gaap_ClassOfWarrantOrRightDomain_019f5c72-4df1-7b3f-b624-b17cdbfd2627" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fgi_PublicOfferingWarrantsToPurchaseOrdinarySharesMember_019f5c72-4df1-7c08-bece-4094888a6bd4" xlink:href="fgi-20260630.xsd#fgi_PublicOfferingWarrantsToPurchaseOrdinarySharesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfWarrantOrRightDomain_019f5c72-4df1-7b3f-b624-b17cdbfd2627" xlink:to="loc_fgi_PublicOfferingWarrantsToPurchaseOrdinarySharesMember_019f5c72-4df1-7c08-bece-4094888a6bd4" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fgi_SharesCapitalAuthorizedAmount_019f5c72-4df1-72e1-994a-24ccb43c0b30" xlink:href="fgi-20260630.xsd#fgi_SharesCapitalAuthorizedAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfWarrantOrRightLineItems_019f5c72-4df1-78cd-87e1-96b984464624" xlink:to="loc_fgi_SharesCapitalAuthorizedAmount_019f5c72-4df1-72e1-994a-24ccb43c0b30" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesAuthorized_019f5c72-4df1-7aed-851c-6217d52ba030" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockSharesAuthorized"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfWarrantOrRightLineItems_019f5c72-4df1-78cd-87e1-96b984464624" xlink:to="loc_us-gaap_CommonStockSharesAuthorized_019f5c72-4df1-7aed-851c-6217d52ba030" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockParOrStatedValuePerShare_019f5c72-4df1-74c7-b20c-3fab02aa5ff9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockParOrStatedValuePerShare"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfWarrantOrRightLineItems_019f5c72-4df1-78cd-87e1-96b984464624" xlink:to="loc_us-gaap_CommonStockParOrStatedValuePerShare_019f5c72-4df1-74c7-b20c-3fab02aa5ff9" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PreferredStockSharesAuthorized_019f5c72-4df1-78c6-af11-972d38baa168" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PreferredStockSharesAuthorized"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfWarrantOrRightLineItems_019f5c72-4df1-78cd-87e1-96b984464624" xlink:to="loc_us-gaap_PreferredStockSharesAuthorized_019f5c72-4df1-78c6-af11-972d38baa168" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PreferredStockParOrStatedValuePerShare_019f5c72-4df1-777c-b7e3-7a15dc8dc247" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PreferredStockParOrStatedValuePerShare"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfWarrantOrRightLineItems_019f5c72-4df1-78cd-87e1-96b984464624" xlink:to="loc_us-gaap_PreferredStockParOrStatedValuePerShare_019f5c72-4df1-777c-b7e3-7a15dc8dc247" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquityNoteStockSplitConversionRatio1_019f5c72-4df1-79b4-abd8-bbf2639df4b3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockholdersEquityNoteStockSplitConversionRatio1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfWarrantOrRightLineItems_019f5c72-4df1-78cd-87e1-96b984464624" xlink:to="loc_us-gaap_StockholdersEquityNoteStockSplitConversionRatio1_019f5c72-4df1-79b4-abd8-bbf2639df4b3" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_fgi_StockIssuedDuringPeriodSharesNewIssueNumberOfSharesCombinedPerShare_019f5c72-4df1-75ac-9b2b-ecdca7cb3941" xlink:href="fgi-20260630.xsd#fgi_StockIssuedDuringPeriodSharesNewIssueNumberOfSharesCombinedPerShare"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfWarrantOrRightLineItems_019f5c72-4df1-78cd-87e1-96b984464624" xlink:to="loc_fgi_StockIssuedDuringPeriodSharesNewIssueNumberOfSharesCombinedPerShare_019f5c72-4df1-75ac-9b2b-ecdca7cb3941" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfWarrantOrRightOutstanding_019f5c72-4df1-77c2-a86a-9da0f68e2c21" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfWarrantOrRightOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfWarrantOrRightLineItems_019f5c72-4df1-78cd-87e1-96b984464624" xlink:to="loc_us-gaap_ClassOfWarrantOrRightOutstanding_019f5c72-4df1-77c2-a86a-9da0f68e2c21" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_fgi_ClassOfWarrantOrRightExercised_019f5c72-4df1-7938-9c60-bd5135189396" xlink:href="fgi-20260630.xsd#fgi_ClassOfWarrantOrRightExercised"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfWarrantOrRightLineItems_019f5c72-4df1-78cd-87e1-96b984464624" xlink:to="loc_fgi_ClassOfWarrantOrRightExercised_019f5c72-4df1-7938-9c60-bd5135189396" xlink:type="arc" order="8"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://fgi-industries.com/role/SharebasedcompensationGeneralInformationDetails" xlink:type="simple" xlink:href="fgi-20260630.xsd#SharebasedcompensationGeneralInformationDetails"/>
  <link:definitionLink xlink:role="http://fgi-industries.com/role/SharebasedcompensationGeneralInformationDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019f5c72-4df1-7a28-b39b-997f032ef0cf" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019f5c72-4df1-7469-97bd-6b75b85d60ec" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019f5c72-4df1-7a28-b39b-997f032ef0cf" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019f5c72-4df1-7469-97bd-6b75b85d60ec" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameAxis_019f5c72-4df1-79a3-abfd-bff809ce962d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PlanNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019f5c72-4df1-7469-97bd-6b75b85d60ec" xlink:to="loc_us-gaap_PlanNameAxis_019f5c72-4df1-79a3-abfd-bff809ce962d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_019f5c72-4df1-79a3-abfd-bff809ce962d_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PlanNameAxis_019f5c72-4df1-79a3-abfd-bff809ce962d" xlink:to="loc_us-gaap_PlanNameDomain_019f5c72-4df1-79a3-abfd-bff809ce962d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_019f5c72-4df1-7d6a-8b69-24b78ab184d6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PlanNameAxis_019f5c72-4df1-79a3-abfd-bff809ce962d" xlink:to="loc_us-gaap_PlanNameDomain_019f5c72-4df1-7d6a-8b69-24b78ab184d6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fgi_EquityPlan2021Member_019f5c72-4df1-7e7c-963c-7098090a2f94" xlink:href="fgi-20260630.xsd#fgi_EquityPlan2021Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanNameDomain_019f5c72-4df1-7d6a-8b69-24b78ab184d6" xlink:to="loc_fgi_EquityPlan2021Member_019f5c72-4df1-7e7c-963c-7098090a2f94" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockCapitalSharesReservedForFutureIssuance_019f5c72-4df1-75a2-bf33-db23cc3ae504" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockCapitalSharesReservedForFutureIssuance"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019f5c72-4df1-7a28-b39b-997f032ef0cf" xlink:to="loc_us-gaap_CommonStockCapitalSharesReservedForFutureIssuance_019f5c72-4df1-75a2-bf33-db23cc3ae504" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fgi_ShareBasedCompensationArrangementByShareBasedPaymentAwardIncreaseInSharesReservedForIssuanceThresholdPercentage_019f5c72-4df1-7cde-933c-133652c60ef8" xlink:href="fgi-20260630.xsd#fgi_ShareBasedCompensationArrangementByShareBasedPaymentAwardIncreaseInSharesReservedForIssuanceThresholdPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019f5c72-4df1-7a28-b39b-997f032ef0cf" xlink:to="loc_fgi_ShareBasedCompensationArrangementByShareBasedPaymentAwardIncreaseInSharesReservedForIssuanceThresholdPercentage_019f5c72-4df1-7cde-933c-133652c60ef8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fgi_ShareBasedCompensationArrangementByShareBasedPaymentAwardIncreaseInSharesReservedForIssuanceThresholdNumberOfShares_019f5c72-4df1-78b1-b1bd-49646019afc9" xlink:href="fgi-20260630.xsd#fgi_ShareBasedCompensationArrangementByShareBasedPaymentAwardIncreaseInSharesReservedForIssuanceThresholdNumberOfShares"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019f5c72-4df1-7a28-b39b-997f032ef0cf" xlink:to="loc_fgi_ShareBasedCompensationArrangementByShareBasedPaymentAwardIncreaseInSharesReservedForIssuanceThresholdNumberOfShares_019f5c72-4df1-78b1-b1bd-49646019afc9" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquityNoteStockSplitConversionRatio1_019f5c72-4df1-707b-aa13-2f7165e30150" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockholdersEquityNoteStockSplitConversionRatio1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019f5c72-4df1-7a28-b39b-997f032ef0cf" xlink:to="loc_us-gaap_StockholdersEquityNoteStockSplitConversionRatio1_019f5c72-4df1-707b-aa13-2f7165e30150" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://fgi-industries.com/role/SharebasedcompensationShareOptionsandRSUActivityDetails" xlink:type="simple" xlink:href="fgi-20260630.xsd#SharebasedcompensationShareOptionsandRSUActivityDetails"/>
  <link:definitionLink xlink:role="http://fgi-industries.com/role/SharebasedcompensationShareOptionsandRSUActivityDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019f5c72-4df1-7967-b628-7edd036c5aa9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019f5c72-4df1-77e0-a37a-5ac2650dfdac" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019f5c72-4df1-7967-b628-7edd036c5aa9" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019f5c72-4df1-77e0-a37a-5ac2650dfdac" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_019f5c72-4df1-7a8a-a338-d3c96b30aa52" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019f5c72-4df1-77e0-a37a-5ac2650dfdac" xlink:to="loc_us-gaap_AwardTypeAxis_019f5c72-4df1-7a8a-a338-d3c96b30aa52" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019f5c72-4df1-7a8a-a338-d3c96b30aa52_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_019f5c72-4df1-7a8a-a338-d3c96b30aa52" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019f5c72-4df1-7a8a-a338-d3c96b30aa52_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019f5c72-4df1-7ee2-bfe2-8df8c534fb18" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_019f5c72-4df1-7a8a-a338-d3c96b30aa52" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019f5c72-4df1-7ee2-bfe2-8df8c534fb18" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedStockUnitsRSUMember_019f5c72-4df1-7001-a4ae-73f8e51d7944" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestrictedStockUnitsRSUMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019f5c72-4df1-7ee2-bfe2-8df8c534fb18" xlink:to="loc_us-gaap_RestrictedStockUnitsRSUMember_019f5c72-4df1-7001-a4ae-73f8e51d7944" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_019f5c72-4df1-7d24-b25e-077fc0ed629e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019f5c72-4df1-7967-b628-7edd036c5aa9" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_019f5c72-4df1-7d24-b25e-077fc0ed629e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_019f5c72-4df1-7f83-a07e-96828b0733ec" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_019f5c72-4df1-7d24-b25e-077fc0ed629e" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_019f5c72-4df1-7f83-a07e-96828b0733ec" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross_019f5c72-4df1-73b5-b6e9-77e0e49ffaa2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_019f5c72-4df1-7d24-b25e-077fc0ed629e" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross_019f5c72-4df1-73b5-b6e9-77e0e49ffaa2" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_fgi_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsCanceledInPeriod_019f5c72-4df1-766e-b610-0aaadd7f453b" xlink:href="fgi-20260630.xsd#fgi_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsCanceledInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_019f5c72-4df1-7d24-b25e-077fc0ed629e" xlink:to="loc_fgi_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsCanceledInPeriod_019f5c72-4df1-766e-b610-0aaadd7f453b" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_019f5c72-4df1-736b-88ce-d7a5c148775f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_019f5c72-4df1-7d24-b25e-077fc0ed629e" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_019f5c72-4df1-736b-88ce-d7a5c148775f" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_019f5c72-4df1-78cc-a0e8-925388e080ed" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableNumber_019f5c72-4df1-71eb-94b9-663945fb4e25" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019f5c72-4df1-7967-b628-7edd036c5aa9" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableNumber_019f5c72-4df1-71eb-94b9-663945fb4e25" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward_019f5c72-4df1-72a0-81cf-58bb0e9d3c76" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019f5c72-4df1-7967-b628-7edd036c5aa9" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward_019f5c72-4df1-72a0-81cf-58bb0e9d3c76" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_019f5c72-4df1-7081-aabc-c0720c9018e4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward_019f5c72-4df1-72a0-81cf-58bb0e9d3c76" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_019f5c72-4df1-7081-aabc-c0720c9018e4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice_019f5c72-4df1-78f7-9cf9-265b8bbcc41c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward_019f5c72-4df1-72a0-81cf-58bb0e9d3c76" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice_019f5c72-4df1-78f7-9cf9-265b8bbcc41c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_fgi_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsCanceledInPeriodWeightedAverageExercisePrice_019f5c72-4df1-7220-bee4-bd7eec5a7bab" xlink:href="fgi-20260630.xsd#fgi_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsCanceledInPeriodWeightedAverageExercisePrice"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward_019f5c72-4df1-72a0-81cf-58bb0e9d3c76" xlink:to="loc_fgi_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsCanceledInPeriodWeightedAverageExercisePrice_019f5c72-4df1-7220-bee4-bd7eec5a7bab" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_019f5c72-4df1-7e2e-b95a-d4bc73b3570a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedWeightedAverageGrantDateFairValueAbstract_019f5c72-4df1-784e-9720-910697791f09" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedWeightedAverageGrantDateFairValueAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019f5c72-4df1-7967-b628-7edd036c5aa9" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedWeightedAverageGrantDateFairValueAbstract_019f5c72-4df1-784e-9720-910697791f09" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedWeightedAverageGrantDateFairValue_019f5c72-4df1-758a-ba90-01706bed4a47" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedWeightedAverageGrantDateFairValueAbstract_019f5c72-4df1-784e-9720-910697791f09" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedWeightedAverageGrantDateFairValue_019f5c72-4df1-758a-ba90-01706bed4a47" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_019f5c72-4df1-74aa-aff6-03efa00c8b8d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedWeightedAverageGrantDateFairValueAbstract_019f5c72-4df1-784e-9720-910697791f09" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_019f5c72-4df1-74aa-aff6-03efa00c8b8d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_fgi_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeitedInPeriodWeightedAverageGrantDateFairValue_019f5c72-4df1-7f50-9e4f-65f6b0c72e82" xlink:href="fgi-20260630.xsd#fgi_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeitedInPeriodWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedWeightedAverageGrantDateFairValueAbstract_019f5c72-4df1-784e-9720-910697791f09" xlink:to="loc_fgi_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeitedInPeriodWeightedAverageGrantDateFairValue_019f5c72-4df1-7f50-9e4f-65f6b0c72e82" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_fgi_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsCanceledInPeriodWeightedAverageGrantDateFairValue_019f5c72-4df1-75b3-875b-0e9a648093f8" xlink:href="fgi-20260630.xsd#fgi_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsCanceledInPeriodWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedWeightedAverageGrantDateFairValueAbstract_019f5c72-4df1-784e-9720-910697791f09" xlink:to="loc_fgi_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsCanceledInPeriodWeightedAverageGrantDateFairValue_019f5c72-4df1-75b3-875b-0e9a648093f8" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedWeightedAverageGrantDateFairValue_019f5c72-4df1-770c-b10b-a7a7eb55a29f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedWeightedAverageGrantDateFairValue"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAdditionalDisclosuresAbstract_019f5c72-4df1-76fd-9336-36c1623b9070" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAdditionalDisclosuresAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019f5c72-4df1-7967-b628-7edd036c5aa9" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAdditionalDisclosuresAbstract_019f5c72-4df1-76fd-9336-36c1623b9070" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2_019f5c72-4df1-7a9c-824d-996b5f466843" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAdditionalDisclosuresAbstract_019f5c72-4df1-76fd-9336-36c1623b9070" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2_019f5c72-4df1-7a9c-824d-996b5f466843" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestAbstract_019f5c72-4df1-77fa-ac98-ad91242435a4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019f5c72-4df1-7967-b628-7edd036c5aa9" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestAbstract_019f5c72-4df1-77fa-ac98-ad91242435a4" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableWeightedAverageExercisePrice_019f5c72-4df1-70e9-b983-85434a5d2351" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableWeightedAverageExercisePrice"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestAbstract_019f5c72-4df1-77fa-ac98-ad91242435a4" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableWeightedAverageExercisePrice_019f5c72-4df1-70e9-b983-85434a5d2351" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fgi_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableWeightedAverageGrantDateFairValue_019f5c72-4df1-77af-ade5-eb971ff6b21a" xlink:href="fgi-20260630.xsd#fgi_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestAbstract_019f5c72-4df1-77fa-ac98-ad91242435a4" xlink:to="loc_fgi_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableWeightedAverageGrantDateFairValue_019f5c72-4df1-77af-ade5-eb971ff6b21a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedAndExpectedToVestExercisableWeightedAverageRemainingContractualTerm1_019f5c72-4df1-70e3-a3cc-aaef4ff6f456" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedAndExpectedToVestExercisableWeightedAverageRemainingContractualTerm1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestAbstract_019f5c72-4df1-77fa-ac98-ad91242435a4" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedAndExpectedToVestExercisableWeightedAverageRemainingContractualTerm1_019f5c72-4df1-70e3-a3cc-aaef4ff6f456" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_fgi_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValueRollForward_019f5c72-4df1-7827-9e2b-a56d8bc0d605" xlink:href="fgi-20260630.xsd#fgi_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValueRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019f5c72-4df1-7967-b628-7edd036c5aa9" xlink:to="loc_fgi_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValueRollForward_019f5c72-4df1-7827-9e2b-a56d8bc0d605" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue_019f5c72-4df1-77e4-8868-164f6ee8db35" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fgi_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValueRollForward_019f5c72-4df1-7827-9e2b-a56d8bc0d605" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue_019f5c72-4df1-77e4-8868-164f6ee8db35" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue_019f5c72-4df1-779c-ae12-d368c59c686f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableAggregateIntrinsicValue_019f5c72-4df1-7f0b-9844-be00e000bb8d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableAggregateIntrinsicValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019f5c72-4df1-7967-b628-7edd036c5aa9" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableAggregateIntrinsicValue_019f5c72-4df1-7f0b-9844-be00e000bb8d" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_019f5c72-4df1-73a4-8002-7b494802556c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019f5c72-4df1-7967-b628-7edd036c5aa9" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_019f5c72-4df1-73a4-8002-7b494802556c" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_019f5c72-4df1-7b65-b223-e296992467f8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_019f5c72-4df1-73a4-8002-7b494802556c" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_019f5c72-4df1-7b65-b223-e296992467f8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_019f5c72-4df1-740b-b73d-3a15a9119c07" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_019f5c72-4df1-73a4-8002-7b494802556c" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_019f5c72-4df1-740b-b73d-3a15a9119c07" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_fgi_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsCanceledInPeriod_019f5c72-4df1-79ec-b2db-6bdfc5c0fb22" xlink:href="fgi-20260630.xsd#fgi_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsCanceledInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_019f5c72-4df1-73a4-8002-7b494802556c" xlink:to="loc_fgi_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsCanceledInPeriod_019f5c72-4df1-79ec-b2db-6bdfc5c0fb22" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_019f5c72-4df1-7f4a-8993-11a7464ec5b7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_019f5c72-4df1-73a4-8002-7b494802556c" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_019f5c72-4df1-7f4a-8993-11a7464ec5b7" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_019f5c72-4df1-7600-88d0-a16a9628ea71" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://fgi-industries.com/role/SharebasedcompensationOptionsFairValueDetails" xlink:type="simple" xlink:href="fgi-20260630.xsd#SharebasedcompensationOptionsFairValueDetails"/>
  <link:definitionLink xlink:role="http://fgi-industries.com/role/SharebasedcompensationOptionsFairValueDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019f5c72-4df1-7513-8f6a-a3004cc7b145" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019f5c72-4df1-7377-8c6d-0cc1fb90a7b2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019f5c72-4df1-7513-8f6a-a3004cc7b145" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019f5c72-4df1-7377-8c6d-0cc1fb90a7b2" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_019f5c72-4df1-765d-951e-3995d4327372" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019f5c72-4df1-7377-8c6d-0cc1fb90a7b2" xlink:to="loc_us-gaap_AwardTypeAxis_019f5c72-4df1-765d-951e-3995d4327372" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019f5c72-4df1-765d-951e-3995d4327372_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_019f5c72-4df1-765d-951e-3995d4327372" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019f5c72-4df1-765d-951e-3995d4327372_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019f5c72-4df1-7988-86f8-5d4903d3e34c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_019f5c72-4df1-765d-951e-3995d4327372" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019f5c72-4df1-7988-86f8-5d4903d3e34c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeStockOptionMember_019f5c72-4df1-762a-9ba3-d2427a05cc6c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EmployeeStockOptionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019f5c72-4df1-7988-86f8-5d4903d3e34c" xlink:to="loc_us-gaap_EmployeeStockOptionMember_019f5c72-4df1-762a-9ba3-d2427a05cc6c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockGrantedDuringPeriodValueSharebasedCompensationGross_019f5c72-4df1-71b1-8898-4513c45f924b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockGrantedDuringPeriodValueSharebasedCompensationGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019f5c72-4df1-7513-8f6a-a3004cc7b145" xlink:to="loc_us-gaap_StockGrantedDuringPeriodValueSharebasedCompensationGross_019f5c72-4df1-71b1-8898-4513c45f924b" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://fgi-industries.com/role/SharebasedcompensationOptionsFairValueAssumptionsDetails" xlink:type="simple" xlink:href="fgi-20260630.xsd#SharebasedcompensationOptionsFairValueAssumptionsDetails"/>
  <link:definitionLink xlink:role="http://fgi-industries.com/role/SharebasedcompensationOptionsFairValueAssumptionsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019f5c72-4df1-7099-b6bd-410cd7e64be8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019f5c72-4df1-770c-a7ae-86ef474b077c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019f5c72-4df1-7099-b6bd-410cd7e64be8" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019f5c72-4df1-770c-a7ae-86ef474b077c" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_019f5c72-4df1-78a9-83e1-6524ffb6a2a2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019f5c72-4df1-770c-a7ae-86ef474b077c" xlink:to="loc_us-gaap_AwardTypeAxis_019f5c72-4df1-78a9-83e1-6524ffb6a2a2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019f5c72-4df1-78a9-83e1-6524ffb6a2a2_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_019f5c72-4df1-78a9-83e1-6524ffb6a2a2" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019f5c72-4df1-78a9-83e1-6524ffb6a2a2_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019f5c72-4df1-716b-a564-eba1dc6c1d52" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_019f5c72-4df1-78a9-83e1-6524ffb6a2a2" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019f5c72-4df1-716b-a564-eba1dc6c1d52" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeStockOptionMember_019f5c72-4df1-7908-a21e-828cf638ce92" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EmployeeStockOptionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019f5c72-4df1-716b-a564-eba1dc6c1d52" xlink:to="loc_us-gaap_EmployeeStockOptionMember_019f5c72-4df1-7908-a21e-828cf638ce92" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate_019f5c72-4df1-730b-987c-b6ee2d4a5e60" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019f5c72-4df1-7099-b6bd-410cd7e64be8" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate_019f5c72-4df1-730b-987c-b6ee2d4a5e60" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate_019f5c72-4df1-7bde-af6c-a2a79b2aac48" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019f5c72-4df1-7099-b6bd-410cd7e64be8" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate_019f5c72-4df1-7bde-af6c-a2a79b2aac48" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharePrice_019f5c72-4df1-7c10-a5d8-503be96235ea" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SharePrice"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019f5c72-4df1-7099-b6bd-410cd7e64be8" xlink:to="loc_us-gaap_SharePrice_019f5c72-4df1-7c10-a5d8-503be96235ea" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://fgi-industries.com/role/SharebasedcompensationSharebasedCompensationExpenseDetails" xlink:type="simple" xlink:href="fgi-20260630.xsd#SharebasedcompensationSharebasedCompensationExpenseDetails"/>
  <link:definitionLink xlink:role="http://fgi-industries.com/role/SharebasedcompensationSharebasedCompensationExpenseDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems_019f5c72-4df1-77eb-ac26-2eaac7c65b40" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable_019f5c72-4df1-7f5d-ad09-788e47b36816" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems_019f5c72-4df1-77eb-ac26-2eaac7c65b40" xlink:to="loc_us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable_019f5c72-4df1-7f5d-ad09-788e47b36816" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationAxis_019f5c72-4df1-7a71-83e0-f1aee44f714d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeStatementLocationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable_019f5c72-4df1-7f5d-ad09-788e47b36816" xlink:to="loc_us-gaap_IncomeStatementLocationAxis_019f5c72-4df1-7a71-83e0-f1aee44f714d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_019f5c72-4df1-7a71-83e0-f1aee44f714d_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeStatementLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_019f5c72-4df1-7a71-83e0-f1aee44f714d" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_019f5c72-4df1-7a71-83e0-f1aee44f714d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_019f5c72-4df1-765b-af62-290744a075f4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeStatementLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_019f5c72-4df1-7a71-83e0-f1aee44f714d" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_019f5c72-4df1-765b-af62-290744a075f4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SellingAndMarketingExpenseMember_019f5c72-4df1-76bc-9b78-642ee3f36981" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SellingAndMarketingExpenseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_019f5c72-4df1-765b-af62-290744a075f4" xlink:to="loc_us-gaap_SellingAndMarketingExpenseMember_019f5c72-4df1-76bc-9b78-642ee3f36981" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GeneralAndAdministrativeExpenseMember_019f5c72-4df1-7314-880b-bc2ce3bb89d2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GeneralAndAdministrativeExpenseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_019f5c72-4df1-765b-af62-290744a075f4" xlink:to="loc_us-gaap_GeneralAndAdministrativeExpenseMember_019f5c72-4df1-7314-880b-bc2ce3bb89d2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllocatedShareBasedCompensationExpense_019f5c72-4df1-7401-a0c3-eb1b3018e32a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AllocatedShareBasedCompensationExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems_019f5c72-4df1-77eb-ac26-2eaac7c65b40" xlink:to="loc_us-gaap_AllocatedShareBasedCompensationExpense_019f5c72-4df1-7401-a0c3-eb1b3018e32a" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://fgi-industries.com/role/RelatedpartytransactionsandbalancesSalestoarelatedpartyDetails" xlink:type="simple" xlink:href="fgi-20260630.xsd#RelatedpartytransactionsandbalancesSalestoarelatedpartyDetails"/>
  <link:definitionLink xlink:role="http://fgi-industries.com/role/RelatedpartytransactionsandbalancesSalestoarelatedpartyDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionLineItems_019f5c72-4df2-70e6-a5f7-c7e16ba767f4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_019f5c72-4df2-74e5-b677-f5617f0b1d2b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019f5c72-4df2-70e6-a5f7-c7e16ba767f4" xlink:to="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_019f5c72-4df2-74e5-b677-f5617f0b1d2b" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CounterpartyNameAxis_019f5c72-4df2-79e3-a47f-03bb06dc97a6" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_CounterpartyNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_019f5c72-4df2-74e5-b677-f5617f0b1d2b" xlink:to="loc_srt_CounterpartyNameAxis_019f5c72-4df2-79e3-a47f-03bb06dc97a6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019f5c72-4df2-79e3-a47f-03bb06dc97a6_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RepurchaseAgreementCounterpartyNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_CounterpartyNameAxis_019f5c72-4df2-79e3-a47f-03bb06dc97a6" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019f5c72-4df2-79e3-a47f-03bb06dc97a6_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019f5c72-4df2-75cb-ac8b-6ccffe5ddc55" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RepurchaseAgreementCounterpartyNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_CounterpartyNameAxis_019f5c72-4df2-79e3-a47f-03bb06dc97a6" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019f5c72-4df2-75cb-ac8b-6ccffe5ddc55" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fgi_ForemostWorldwideCompanyLimitedMember_019f5c72-4df2-7235-bf40-67e953f2b808" xlink:href="fgi-20260630.xsd#fgi_ForemostWorldwideCompanyLimitedMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019f5c72-4df2-75cb-ac8b-6ccffe5ddc55" xlink:to="loc_fgi_ForemostWorldwideCompanyLimitedMember_019f5c72-4df2-7235-bf40-67e953f2b808" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionAxis_019f5c72-4df2-7af1-bc5c-903bc0733dc0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_019f5c72-4df2-74e5-b677-f5617f0b1d2b" xlink:to="loc_us-gaap_RelatedPartyTransactionAxis_019f5c72-4df2-7af1-bc5c-903bc0733dc0" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionDomain_019f5c72-4df2-7af1-bc5c-903bc0733dc0_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RelatedPartyTransactionAxis_019f5c72-4df2-7af1-bc5c-903bc0733dc0" xlink:to="loc_us-gaap_RelatedPartyTransactionDomain_019f5c72-4df2-7af1-bc5c-903bc0733dc0_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionDomain_019f5c72-4df2-72f9-8613-5f20a6fdf696" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RelatedPartyTransactionAxis_019f5c72-4df2-7af1-bc5c-903bc0733dc0" xlink:to="loc_us-gaap_RelatedPartyTransactionDomain_019f5c72-4df2-72f9-8613-5f20a6fdf696" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyMember_019f5c72-4df2-7988-adfa-b31f885b170a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionDomain_019f5c72-4df2-72f9-8613-5f20a6fdf696" xlink:to="loc_us-gaap_RelatedPartyMember_019f5c72-4df2-7988-adfa-b31f885b170a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_019f5c72-4df2-78f3-821a-8103266d7eef" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019f5c72-4df2-70e6-a5f7-c7e16ba767f4" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_019f5c72-4df2-78f3-821a-8103266d7eef" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://fgi-industries.com/role/RelatedpartytransactionsandbalancesPurchasesofarelatedpartyDetails" xlink:type="simple" xlink:href="fgi-20260630.xsd#RelatedpartytransactionsandbalancesPurchasesofarelatedpartyDetails"/>
  <link:definitionLink xlink:role="http://fgi-industries.com/role/RelatedpartytransactionsandbalancesPurchasesofarelatedpartyDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionLineItems_019f5c72-4df2-770e-9319-fd4f9fc52fe1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_019f5c72-4df2-7879-86f6-af4ed82723f1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019f5c72-4df2-770e-9319-fd4f9fc52fe1" xlink:to="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_019f5c72-4df2-7879-86f6-af4ed82723f1" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CounterpartyNameAxis_019f5c72-4df2-7d42-9939-64fdd783512c" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_CounterpartyNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_019f5c72-4df2-7879-86f6-af4ed82723f1" xlink:to="loc_srt_CounterpartyNameAxis_019f5c72-4df2-7d42-9939-64fdd783512c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019f5c72-4df2-7d42-9939-64fdd783512c_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RepurchaseAgreementCounterpartyNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_CounterpartyNameAxis_019f5c72-4df2-7d42-9939-64fdd783512c" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019f5c72-4df2-7d42-9939-64fdd783512c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019f5c72-4df2-7a28-8880-8392c3947eff" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RepurchaseAgreementCounterpartyNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_CounterpartyNameAxis_019f5c72-4df2-7d42-9939-64fdd783512c" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019f5c72-4df2-7a28-8880-8392c3947eff" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fgi_FocalCapitalHoldingLimitedMember_019f5c72-4df2-7ad8-b504-b9c50b833cea" xlink:href="fgi-20260630.xsd#fgi_FocalCapitalHoldingLimitedMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019f5c72-4df2-7a28-8880-8392c3947eff" xlink:to="loc_fgi_FocalCapitalHoldingLimitedMember_019f5c72-4df2-7ad8-b504-b9c50b833cea" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fgi_ForemostWorldwideCompanyLimitedMember_019f5c72-4df2-7c1a-bbe1-098a749b4f50" xlink:href="fgi-20260630.xsd#fgi_ForemostWorldwideCompanyLimitedMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019f5c72-4df2-7a28-8880-8392c3947eff" xlink:to="loc_fgi_ForemostWorldwideCompanyLimitedMember_019f5c72-4df2-7c1a-bbe1-098a749b4f50" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fgi_RizhaoForemostWoodworkManufacturingCompanyLimitedMember_019f5c72-4df2-7e00-a573-23b571cfa901" xlink:href="fgi-20260630.xsd#fgi_RizhaoForemostWoodworkManufacturingCompanyLimitedMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019f5c72-4df2-7a28-8880-8392c3947eff" xlink:to="loc_fgi_RizhaoForemostWoodworkManufacturingCompanyLimitedMember_019f5c72-4df2-7e00-a573-23b571cfa901" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_fgi_F.P.Z.FurnitureCambodiaCo.Ltd.Member_019f5c72-4df2-72f9-9fb2-90d6caa17818" xlink:href="fgi-20260630.xsd#fgi_F.P.Z.FurnitureCambodiaCo.Ltd.Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019f5c72-4df2-7a28-8880-8392c3947eff" xlink:to="loc_fgi_F.P.Z.FurnitureCambodiaCo.Ltd.Member_019f5c72-4df2-72f9-9fb2-90d6caa17818" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionPurchasesFromRelatedParty_019f5c72-4df2-7073-a707-d9bf811e00ae" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionPurchasesFromRelatedParty"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019f5c72-4df2-770e-9319-fd4f9fc52fe1" xlink:to="loc_us-gaap_RelatedPartyTransactionPurchasesFromRelatedParty_019f5c72-4df2-7073-a707-d9bf811e00ae" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://fgi-industries.com/role/RelatedpartytransactionsandbalancesSharedServiceandMiscellaneousExpensesTabularDisclosureDetails" xlink:type="simple" xlink:href="fgi-20260630.xsd#RelatedpartytransactionsandbalancesSharedServiceandMiscellaneousExpensesTabularDisclosureDetails"/>
  <link:definitionLink xlink:role="http://fgi-industries.com/role/RelatedpartytransactionsandbalancesSharedServiceandMiscellaneousExpensesTabularDisclosureDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionLineItems_019f5c72-4df2-7b6a-b0dd-f0d30b4ee073" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_019f5c72-4df2-716b-95de-990dd3e6cbf1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019f5c72-4df2-7b6a-b0dd-f0d30b4ee073" xlink:to="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_019f5c72-4df2-716b-95de-990dd3e6cbf1" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019f5c72-4df2-79c6-9773-37f16df7c93a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_019f5c72-4df2-716b-95de-990dd3e6cbf1" xlink:to="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019f5c72-4df2-79c6-9773-37f16df7c93a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_019f5c72-4df2-79c6-9773-37f16df7c93a_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019f5c72-4df2-79c6-9773-37f16df7c93a" xlink:to="loc_us-gaap_RelatedPartyDomain_019f5c72-4df2-79c6-9773-37f16df7c93a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_019f5c72-4df2-7a4f-a4c0-73818a7c97fd" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019f5c72-4df2-79c6-9773-37f16df7c93a" xlink:to="loc_us-gaap_RelatedPartyDomain_019f5c72-4df2-7a4f-a4c0-73818a7c97fd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyMember_019f5c72-4df2-7c36-b3ed-cea664cad390" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyDomain_019f5c72-4df2-7a4f-a4c0-73818a7c97fd" xlink:to="loc_us-gaap_RelatedPartyMember_019f5c72-4df2-7c36-b3ed-cea664cad390" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CounterpartyNameAxis_019f5c72-4df2-741b-b6c4-948079c0bdf3" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_CounterpartyNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_019f5c72-4df2-716b-95de-990dd3e6cbf1" xlink:to="loc_srt_CounterpartyNameAxis_019f5c72-4df2-741b-b6c4-948079c0bdf3" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019f5c72-4df2-741b-b6c4-948079c0bdf3_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RepurchaseAgreementCounterpartyNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_CounterpartyNameAxis_019f5c72-4df2-741b-b6c4-948079c0bdf3" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019f5c72-4df2-741b-b6c4-948079c0bdf3_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019f5c72-4df2-7081-9fdb-2436eca52fc5" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RepurchaseAgreementCounterpartyNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_CounterpartyNameAxis_019f5c72-4df2-741b-b6c4-948079c0bdf3" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019f5c72-4df2-7081-9fdb-2436eca52fc5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fgi_ForemostHomeIncorporatedMember_019f5c72-4df2-7165-9811-312a46b968de" xlink:href="fgi-20260630.xsd#fgi_ForemostHomeIncorporatedMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019f5c72-4df2-7081-9fdb-2436eca52fc5" xlink:to="loc_fgi_ForemostHomeIncorporatedMember_019f5c72-4df2-7165-9811-312a46b968de" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fgi_ForemostWorldwideCompanyLimitedMember_019f5c72-4df2-76ff-b2d3-0f73e89cf95b" xlink:href="fgi-20260630.xsd#fgi_ForemostWorldwideCompanyLimitedMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019f5c72-4df2-7081-9fdb-2436eca52fc5" xlink:to="loc_fgi_ForemostWorldwideCompanyLimitedMember_019f5c72-4df2-76ff-b2d3-0f73e89cf95b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fgi_FocalCapitalHoldingLimitedMember_019f5c72-4df2-7ff7-b932-e86d5219f909" xlink:href="fgi-20260630.xsd#fgi_FocalCapitalHoldingLimitedMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019f5c72-4df2-7081-9fdb-2436eca52fc5" xlink:to="loc_fgi_FocalCapitalHoldingLimitedMember_019f5c72-4df2-7ff7-b932-e86d5219f909" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_fgi_F.P.Z.FurnitureCambodiaCo.Ltd.Member_019f5c72-4df2-7d6d-8f77-6db8cda895d9" xlink:href="fgi-20260630.xsd#fgi_F.P.Z.FurnitureCambodiaCo.Ltd.Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019f5c72-4df2-7081-9fdb-2436eca52fc5" xlink:to="loc_fgi_F.P.Z.FurnitureCambodiaCo.Ltd.Member_019f5c72-4df2-7d6d-8f77-6db8cda895d9" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_fgi_RizhaoForemostWoodworkManufacturingCompanyLimitedMember_019f5c72-4df2-7d0d-b48e-93aa8a4f8856" xlink:href="fgi-20260630.xsd#fgi_RizhaoForemostWoodworkManufacturingCompanyLimitedMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019f5c72-4df2-7081-9fdb-2436eca52fc5" xlink:to="loc_fgi_RizhaoForemostWoodworkManufacturingCompanyLimitedMember_019f5c72-4df2-7d0d-b48e-93aa8a4f8856" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_fgi_DueFromRelatedPartiesCurrentPrepayments_019f5c72-4df2-72d4-96ee-b0047e7ed899" xlink:href="fgi-20260630.xsd#fgi_DueFromRelatedPartiesCurrentPrepayments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019f5c72-4df2-7b6a-b0dd-f0d30b4ee073" xlink:to="loc_fgi_DueFromRelatedPartiesCurrentPrepayments_019f5c72-4df2-72d4-96ee-b0047e7ed899" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherReceivables_019f5c72-4df2-73ca-af52-bd935946dad3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherReceivables"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019f5c72-4df2-7b6a-b0dd-f0d30b4ee073" xlink:to="loc_us-gaap_OtherReceivables_019f5c72-4df2-73ca-af52-bd935946dad3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherLiabilities_019f5c72-4df2-7f5b-9a50-d6d3e8a57c80" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019f5c72-4df2-7b6a-b0dd-f0d30b4ee073" xlink:to="loc_us-gaap_OtherLiabilities_019f5c72-4df2-7f5b-9a50-d6d3e8a57c80" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://fgi-industries.com/role/RelatedpartytransactionsandbalancesAccountsPayablesDetails" xlink:type="simple" xlink:href="fgi-20260630.xsd#RelatedpartytransactionsandbalancesAccountsPayablesDetails"/>
  <link:definitionLink xlink:role="http://fgi-industries.com/role/RelatedpartytransactionsandbalancesAccountsPayablesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionLineItems_019f5c72-4df2-729f-ae43-8d43c0ffb999" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_019f5c72-4df2-7122-a4f1-ab3a6ad53d86" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019f5c72-4df2-729f-ae43-8d43c0ffb999" xlink:to="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_019f5c72-4df2-7122-a4f1-ab3a6ad53d86" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019f5c72-4df2-7264-a601-6b2ef8c9a3b0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_019f5c72-4df2-7122-a4f1-ab3a6ad53d86" xlink:to="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019f5c72-4df2-7264-a601-6b2ef8c9a3b0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_019f5c72-4df2-7264-a601-6b2ef8c9a3b0_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019f5c72-4df2-7264-a601-6b2ef8c9a3b0" xlink:to="loc_us-gaap_RelatedPartyDomain_019f5c72-4df2-7264-a601-6b2ef8c9a3b0_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_019f5c72-4df2-707b-a75b-5ecf9eafd8af" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019f5c72-4df2-7264-a601-6b2ef8c9a3b0" xlink:to="loc_us-gaap_RelatedPartyDomain_019f5c72-4df2-707b-a75b-5ecf9eafd8af" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyMember_019f5c72-4df2-75e7-a3ed-2d7648776c4d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyDomain_019f5c72-4df2-707b-a75b-5ecf9eafd8af" xlink:to="loc_us-gaap_RelatedPartyMember_019f5c72-4df2-75e7-a3ed-2d7648776c4d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CounterpartyNameAxis_019f5c72-4df2-785a-b8e8-9897ab0023e2" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_CounterpartyNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_019f5c72-4df2-7122-a4f1-ab3a6ad53d86" xlink:to="loc_srt_CounterpartyNameAxis_019f5c72-4df2-785a-b8e8-9897ab0023e2" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019f5c72-4df2-785a-b8e8-9897ab0023e2_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RepurchaseAgreementCounterpartyNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_CounterpartyNameAxis_019f5c72-4df2-785a-b8e8-9897ab0023e2" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019f5c72-4df2-785a-b8e8-9897ab0023e2_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019f5c72-4df2-76d8-b043-c20081cd2725" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RepurchaseAgreementCounterpartyNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_CounterpartyNameAxis_019f5c72-4df2-785a-b8e8-9897ab0023e2" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019f5c72-4df2-76d8-b043-c20081cd2725" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fgi_ForemostWorldwideCompanyLimitedMember_019f5c72-4df2-7c75-94a2-0507284e2434" xlink:href="fgi-20260630.xsd#fgi_ForemostWorldwideCompanyLimitedMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019f5c72-4df2-76d8-b043-c20081cd2725" xlink:to="loc_fgi_ForemostWorldwideCompanyLimitedMember_019f5c72-4df2-7c75-94a2-0507284e2434" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fgi_RizhaoForemostWoodworkManufacturingCompanyLimitedMember_019f5c72-4df2-78f3-b2db-49c5c54684fa" xlink:href="fgi-20260630.xsd#fgi_RizhaoForemostWoodworkManufacturingCompanyLimitedMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019f5c72-4df2-76d8-b043-c20081cd2725" xlink:to="loc_fgi_RizhaoForemostWoodworkManufacturingCompanyLimitedMember_019f5c72-4df2-78f3-b2db-49c5c54684fa" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fgi_F.P.Z.FurnitureCambodiaCo.Ltd.Member_019f5c72-4df2-7be4-9aaf-e6064b4746d1" xlink:href="fgi-20260630.xsd#fgi_F.P.Z.FurnitureCambodiaCo.Ltd.Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019f5c72-4df2-76d8-b043-c20081cd2725" xlink:to="loc_fgi_F.P.Z.FurnitureCambodiaCo.Ltd.Member_019f5c72-4df2-7be4-9aaf-e6064b4746d1" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsPayableCurrent_019f5c72-4df2-75a0-9934-c47a97b46357" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccountsPayableCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019f5c72-4df2-729f-ae43-8d43c0ffb999" xlink:to="loc_us-gaap_AccountsPayableCurrent_019f5c72-4df2-75a0-9934-c47a97b46357" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://fgi-industries.com/role/RelatedpartytransactionsandbalancesSharedServiceandMiscellaneousExpensesGeneralInformationDetails" xlink:type="simple" xlink:href="fgi-20260630.xsd#RelatedpartytransactionsandbalancesSharedServiceandMiscellaneousExpensesGeneralInformationDetails"/>
  <link:definitionLink xlink:role="http://fgi-industries.com/role/RelatedpartytransactionsandbalancesSharedServiceandMiscellaneousExpensesGeneralInformationDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionLineItems_019f5c72-4df2-730d-b518-cd907de4e820" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_019f5c72-4df2-7af0-89be-b5628f3c9494" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019f5c72-4df2-730d-b518-cd907de4e820" xlink:to="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_019f5c72-4df2-7af0-89be-b5628f3c9494" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionAxis_019f5c72-4df2-7295-beac-f6ae4bcc025c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_019f5c72-4df2-7af0-89be-b5628f3c9494" xlink:to="loc_us-gaap_RelatedPartyTransactionAxis_019f5c72-4df2-7295-beac-f6ae4bcc025c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionDomain_019f5c72-4df2-7295-beac-f6ae4bcc025c_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RelatedPartyTransactionAxis_019f5c72-4df2-7295-beac-f6ae4bcc025c" xlink:to="loc_us-gaap_RelatedPartyTransactionDomain_019f5c72-4df2-7295-beac-f6ae4bcc025c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionDomain_019f5c72-4df2-7912-834f-75319448e157" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RelatedPartyTransactionAxis_019f5c72-4df2-7295-beac-f6ae4bcc025c" xlink:to="loc_us-gaap_RelatedPartyTransactionDomain_019f5c72-4df2-7912-834f-75319448e157" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fgi_SharedServicesAgreementAndMiscellaneousExpensesProvideServicesMember_019f5c72-4df2-7195-8c69-7f36afd3a7d2" xlink:href="fgi-20260630.xsd#fgi_SharedServicesAgreementAndMiscellaneousExpensesProvideServicesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionDomain_019f5c72-4df2-7912-834f-75319448e157" xlink:to="loc_fgi_SharedServicesAgreementAndMiscellaneousExpensesProvideServicesMember_019f5c72-4df2-7195-8c69-7f36afd3a7d2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fgi_SharedServicesAgreementAndMiscellaneousExpensesReceiveServicesMember_019f5c72-4df2-76a8-a26d-5f8c69552168" xlink:href="fgi-20260630.xsd#fgi_SharedServicesAgreementAndMiscellaneousExpensesReceiveServicesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionDomain_019f5c72-4df2-7912-834f-75319448e157" xlink:to="loc_fgi_SharedServicesAgreementAndMiscellaneousExpensesReceiveServicesMember_019f5c72-4df2-76a8-a26d-5f8c69552168" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CounterpartyNameAxis_019f5c72-4df2-7ed3-afe9-3cb2ac6caba0" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_CounterpartyNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_019f5c72-4df2-7af0-89be-b5628f3c9494" xlink:to="loc_srt_CounterpartyNameAxis_019f5c72-4df2-7ed3-afe9-3cb2ac6caba0" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019f5c72-4df2-7ed3-afe9-3cb2ac6caba0_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RepurchaseAgreementCounterpartyNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_CounterpartyNameAxis_019f5c72-4df2-7ed3-afe9-3cb2ac6caba0" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019f5c72-4df2-7ed3-afe9-3cb2ac6caba0_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019f5c72-4df2-761b-ae26-0727d2f7c6e3" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RepurchaseAgreementCounterpartyNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_CounterpartyNameAxis_019f5c72-4df2-7ed3-afe9-3cb2ac6caba0" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019f5c72-4df2-761b-ae26-0727d2f7c6e3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fgi_ForemostHomeIncorporatedMember_019f5c72-4df2-7cb6-a5e7-183889516bc9" xlink:href="fgi-20260630.xsd#fgi_ForemostHomeIncorporatedMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019f5c72-4df2-761b-ae26-0727d2f7c6e3" xlink:to="loc_fgi_ForemostHomeIncorporatedMember_019f5c72-4df2-7cb6-a5e7-183889516bc9" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fgi_ForemostWorldwideCompanyLimitedMember_019f5c72-4df2-7fc7-b250-48d93578b46a" xlink:href="fgi-20260630.xsd#fgi_ForemostWorldwideCompanyLimitedMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019f5c72-4df2-761b-ae26-0727d2f7c6e3" xlink:to="loc_fgi_ForemostWorldwideCompanyLimitedMember_019f5c72-4df2-7fc7-b250-48d93578b46a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionAmountsOfTransaction_019f5c72-4df2-7a03-a9ce-ec6f7c85794d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionAmountsOfTransaction"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019f5c72-4df2-730d-b518-cd907de4e820" xlink:to="loc_us-gaap_RelatedPartyTransactionAmountsOfTransaction_019f5c72-4df2-7a03-a9ce-ec6f7c85794d" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://fgi-industries.com/role/RelatedpartytransactionsandbalancesLoanGuaranteebyRelatedPartyDetails" xlink:type="simple" xlink:href="fgi-20260630.xsd#RelatedpartytransactionsandbalancesLoanGuaranteebyRelatedPartyDetails"/>
  <link:definitionLink xlink:role="http://fgi-industries.com/role/RelatedpartytransactionsandbalancesLoanGuaranteebyRelatedPartyDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionLineItems_019f5c72-4df2-7f96-991e-41080aeeb892" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_019f5c72-4df2-734b-85ae-7d03581a67fb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019f5c72-4df2-7f96-991e-41080aeeb892" xlink:to="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_019f5c72-4df2-734b-85ae-7d03581a67fb" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_019f5c72-4df2-77c9-ad55-82e17ac0284a" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_019f5c72-4df2-734b-85ae-7d03581a67fb" xlink:to="loc_dei_LegalEntityAxis_019f5c72-4df2-77c9-ad55-82e17ac0284a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019f5c72-4df2-77c9-ad55-82e17ac0284a_default" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_019f5c72-4df2-77c9-ad55-82e17ac0284a" xlink:to="loc_dei_EntityDomain_019f5c72-4df2-77c9-ad55-82e17ac0284a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019f5c72-4df2-78a1-ac58-233095132c1d" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_019f5c72-4df2-77c9-ad55-82e17ac0284a" xlink:to="loc_dei_EntityDomain_019f5c72-4df2-78a1-ac58-233095132c1d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fgi_Mr.LiangChouChenMember_019f5c72-4df2-75c9-b571-dd277b7473ca" xlink:href="fgi-20260630.xsd#fgi_Mr.LiangChouChenMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019f5c72-4df2-78a1-ac58-233095132c1d" xlink:to="loc_fgi_Mr.LiangChouChenMember_019f5c72-4df2-75c9-b571-dd277b7473ca" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_OwnershipAxis_019f5c72-4df2-7ada-8a35-df5cf24cf07c" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_OwnershipAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_019f5c72-4df2-734b-85ae-7d03581a67fb" xlink:to="loc_srt_OwnershipAxis_019f5c72-4df2-7ada-8a35-df5cf24cf07c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_OwnershipDomain_019f5c72-4df2-7ada-8a35-df5cf24cf07c_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_OwnershipDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_OwnershipAxis_019f5c72-4df2-7ada-8a35-df5cf24cf07c" xlink:to="loc_srt_OwnershipDomain_019f5c72-4df2-7ada-8a35-df5cf24cf07c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_OwnershipDomain_019f5c72-4df2-7bc2-b2a5-c9ca350556ed" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_OwnershipDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_OwnershipAxis_019f5c72-4df2-7ada-8a35-df5cf24cf07c" xlink:to="loc_srt_OwnershipDomain_019f5c72-4df2-7bc2-b2a5-c9ca350556ed" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fgi_ForemostGroupsLtd.Member_019f5c72-4df2-76ab-8785-c622cb868dc7" xlink:href="fgi-20260630.xsd#fgi_ForemostGroupsLtd.Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_OwnershipDomain_019f5c72-4df2-7bc2-b2a5-c9ca350556ed" xlink:to="loc_fgi_ForemostGroupsLtd.Member_019f5c72-4df2-76ab-8785-c622cb868dc7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MinorityInterestOwnershipPercentageByParent_019f5c72-4df2-7022-b70b-6e0f80b1be37" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MinorityInterestOwnershipPercentageByParent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019f5c72-4df2-7f96-991e-41080aeeb892" xlink:to="loc_us-gaap_MinorityInterestOwnershipPercentageByParent_019f5c72-4df2-7022-b70b-6e0f80b1be37" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://fgi-industries.com/role/ConcentrationsofrisksCreditRiskDetails" xlink:type="simple" xlink:href="fgi-20260630.xsd#ConcentrationsofrisksCreditRiskDetails"/>
  <link:definitionLink xlink:role="http://fgi-industries.com/role/ConcentrationsofrisksCreditRiskDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskLineItems_019f5c72-4df2-72de-9200-79191f557700" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskTable_019f5c72-4df2-7350-be9c-47f877b8fd56" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ConcentrationRiskLineItems_019f5c72-4df2-72de-9200-79191f557700" xlink:to="loc_us-gaap_ConcentrationRiskTable_019f5c72-4df2-7350-be9c-47f877b8fd56" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_StatementGeographicalAxis_019f5c72-4df2-7d2d-8dae-ca5d75a35b7c" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_StatementGeographicalAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ConcentrationRiskTable_019f5c72-4df2-7350-be9c-47f877b8fd56" xlink:to="loc_srt_StatementGeographicalAxis_019f5c72-4df2-7d2d-8dae-ca5d75a35b7c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_019f5c72-4df2-7d2d-8dae-ca5d75a35b7c_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_SegmentGeographicalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_StatementGeographicalAxis_019f5c72-4df2-7d2d-8dae-ca5d75a35b7c" xlink:to="loc_srt_SegmentGeographicalDomain_019f5c72-4df2-7d2d-8dae-ca5d75a35b7c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_019f5c72-4df2-7251-92f2-a36589643f65" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_SegmentGeographicalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_StatementGeographicalAxis_019f5c72-4df2-7d2d-8dae-ca5d75a35b7c" xlink:to="loc_srt_SegmentGeographicalDomain_019f5c72-4df2-7251-92f2-a36589643f65" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_US_019f5c72-4df2-7618-a076-8cb43676af1b" xlink:href="https://xbrl.sec.gov/country/2025/country-2025.xsd#country_US"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_019f5c72-4df2-7251-92f2-a36589643f65" xlink:to="loc_country_US_019f5c72-4df2-7618-a076-8cb43676af1b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_TW_019f5c72-4df2-75e5-970d-318ccd0b254a" xlink:href="https://xbrl.sec.gov/country/2025/country-2025.xsd#country_TW"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_019f5c72-4df2-7251-92f2-a36589643f65" xlink:to="loc_country_TW_019f5c72-4df2-75e5-970d-318ccd0b254a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_KH_019f5c72-4df2-7043-beed-1dd12a2cace9" xlink:href="https://xbrl.sec.gov/country/2025/country-2025.xsd#country_KH"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_019f5c72-4df2-7251-92f2-a36589643f65" xlink:to="loc_country_KH_019f5c72-4df2-7043-beed-1dd12a2cace9" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EuropeanUnionMember_019f5c72-4df2-74a1-9c8b-a0b2ba43809c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EuropeanUnionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_019f5c72-4df2-7251-92f2-a36589643f65" xlink:to="loc_us-gaap_EuropeanUnionMember_019f5c72-4df2-74a1-9c8b-a0b2ba43809c" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_CA_019fea1d-8d63-795b-a9c4-1a5b819f9c0e" xlink:href="https://xbrl.sec.gov/country/2025/country-2025.xsd#country_CA"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_019f5c72-4df2-7251-92f2-a36589643f65" xlink:to="loc_country_CA_019fea1d-8d63-795b-a9c4-1a5b819f9c0e" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_IN_019fea1d-8d63-7daa-b665-27dc42037b3f" xlink:href="https://xbrl.sec.gov/country/2025/country-2025.xsd#country_IN"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_019f5c72-4df2-7251-92f2-a36589643f65" xlink:to="loc_country_IN_019fea1d-8d63-7daa-b665-27dc42037b3f" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Cash_019f5c72-4df2-7226-a436-30b3a0a48197" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_Cash"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskLineItems_019f5c72-4df2-72de-9200-79191f557700" xlink:to="loc_us-gaap_Cash_019f5c72-4df2-7226-a436-30b3a0a48197" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fgi_CashAmountUninsuredByFederalDepositInsuranceCorporation_019f5c72-4df2-79e2-8eb0-a0d154160709" xlink:href="fgi-20260630.xsd#fgi_CashAmountUninsuredByFederalDepositInsuranceCorporation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskLineItems_019f5c72-4df2-72de-9200-79191f557700" xlink:to="loc_fgi_CashAmountUninsuredByFederalDepositInsuranceCorporation_019f5c72-4df2-79e2-8eb0-a0d154160709" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fgi_CashAmountUninsuredByTaiwanCentralDepositInsuranceCorporation_019f5c72-4df2-7271-8f2e-99428a46f4ac" xlink:href="fgi-20260630.xsd#fgi_CashAmountUninsuredByTaiwanCentralDepositInsuranceCorporation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskLineItems_019f5c72-4df2-72de-9200-79191f557700" xlink:to="loc_fgi_CashAmountUninsuredByTaiwanCentralDepositInsuranceCorporation_019f5c72-4df2-7271-8f2e-99428a46f4ac" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_fgi_CashAmountUninsuredByKingdomOfCambodiaDepositInsuranceCorporation_019f5c72-4df2-721b-9333-1aea1266eb5e" xlink:href="fgi-20260630.xsd#fgi_CashAmountUninsuredByKingdomOfCambodiaDepositInsuranceCorporation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskLineItems_019f5c72-4df2-72de-9200-79191f557700" xlink:to="loc_fgi_CashAmountUninsuredByKingdomOfCambodiaDepositInsuranceCorporation_019f5c72-4df2-721b-9333-1aea1266eb5e" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_fgi_CashAmountUninsuredByEuropeanBankingAuthority_019f5c72-4df2-7ede-85f9-38f1609f9599" xlink:href="fgi-20260630.xsd#fgi_CashAmountUninsuredByEuropeanBankingAuthority"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskLineItems_019f5c72-4df2-72de-9200-79191f557700" xlink:to="loc_fgi_CashAmountUninsuredByEuropeanBankingAuthority_019f5c72-4df2-7ede-85f9-38f1609f9599" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_fgi_CashAmountUninsuredByCanadianDepositInsuranceCorporation_019fea1d-8d63-7ad9-a886-ce2e3f091bd7" xlink:href="fgi-20260630.xsd#fgi_CashAmountUninsuredByCanadianDepositInsuranceCorporation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskLineItems_019f5c72-4df2-72de-9200-79191f557700" xlink:to="loc_fgi_CashAmountUninsuredByCanadianDepositInsuranceCorporation_019fea1d-8d63-7ad9-a886-ce2e3f091bd7" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_fgi_CashAmountUninsuredByIndianBankingAuthority_019fea1d-8d63-7501-8bb5-5feed9ff09b7" xlink:href="fgi-20260630.xsd#fgi_CashAmountUninsuredByIndianBankingAuthority"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskLineItems_019f5c72-4df2-72de-9200-79191f557700" xlink:to="loc_fgi_CashAmountUninsuredByIndianBankingAuthority_019fea1d-8d63-7501-8bb5-5feed9ff09b7" xlink:type="arc" order="6"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://fgi-industries.com/role/ConcentrationsofrisksCustomerConcentrationRiskDetails" xlink:type="simple" xlink:href="fgi-20260630.xsd#ConcentrationsofrisksCustomerConcentrationRiskDetails"/>
  <link:definitionLink xlink:role="http://fgi-industries.com/role/ConcentrationsofrisksCustomerConcentrationRiskDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskLineItems_019f5c72-4df2-741c-8fd9-6a19617f55da" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskTable_019f5c72-4df2-7c59-be4c-fdd8eb8c308f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ConcentrationRiskLineItems_019f5c72-4df2-741c-8fd9-6a19617f55da" xlink:to="loc_us-gaap_ConcentrationRiskTable_019f5c72-4df2-7c59-be4c-fdd8eb8c308f" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_019f5c72-4df2-744e-9b20-ffc9ca39c161" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskByBenchmarkAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ConcentrationRiskTable_019f5c72-4df2-7c59-be4c-fdd8eb8c308f" xlink:to="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_019f5c72-4df2-744e-9b20-ffc9ca39c161" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskBenchmarkDomain_019f5c72-4df2-744e-9b20-ffc9ca39c161_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskBenchmarkDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_019f5c72-4df2-744e-9b20-ffc9ca39c161" xlink:to="loc_us-gaap_ConcentrationRiskBenchmarkDomain_019f5c72-4df2-744e-9b20-ffc9ca39c161_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskBenchmarkDomain_019f5c72-4df2-7c59-badd-8f048837244b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskBenchmarkDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_019f5c72-4df2-744e-9b20-ffc9ca39c161" xlink:to="loc_us-gaap_ConcentrationRiskBenchmarkDomain_019f5c72-4df2-7c59-badd-8f048837244b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerMember_019f5c72-4df2-7ed9-a44b-7b7e413f454c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RevenueFromContractWithCustomerMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskBenchmarkDomain_019f5c72-4df2-7c59-badd-8f048837244b" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerMember_019f5c72-4df2-7ed9-a44b-7b7e413f454c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsReceivableMember_019f5c72-4df2-7cd0-9e0b-7a84f911e529" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccountsReceivableMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskBenchmarkDomain_019f5c72-4df2-7c59-badd-8f048837244b" xlink:to="loc_us-gaap_AccountsReceivableMember_019f5c72-4df2-7cd0-9e0b-7a84f911e529" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskByTypeAxis_019f5c72-4df2-77f4-bff2-c7e8feef1bf3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskByTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ConcentrationRiskTable_019f5c72-4df2-7c59-be4c-fdd8eb8c308f" xlink:to="loc_us-gaap_ConcentrationRiskByTypeAxis_019f5c72-4df2-77f4-bff2-c7e8feef1bf3" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskTypeDomain_019f5c72-4df2-77f4-bff2-c7e8feef1bf3_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConcentrationRiskByTypeAxis_019f5c72-4df2-77f4-bff2-c7e8feef1bf3" xlink:to="loc_us-gaap_ConcentrationRiskTypeDomain_019f5c72-4df2-77f4-bff2-c7e8feef1bf3_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskTypeDomain_019f5c72-4df2-74ab-b39a-2c1fa3f28277" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConcentrationRiskByTypeAxis_019f5c72-4df2-77f4-bff2-c7e8feef1bf3" xlink:to="loc_us-gaap_ConcentrationRiskTypeDomain_019f5c72-4df2-74ab-b39a-2c1fa3f28277" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CustomerConcentrationRiskMember_019f5c72-4df2-78a2-bef0-ba18b05cdba0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CustomerConcentrationRiskMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskTypeDomain_019f5c72-4df2-74ab-b39a-2c1fa3f28277" xlink:to="loc_us-gaap_CustomerConcentrationRiskMember_019f5c72-4df2-78a2-bef0-ba18b05cdba0" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MajorCustomersAxis_019f5c72-4df2-74a4-a061-09ce56f089e5" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_MajorCustomersAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ConcentrationRiskTable_019f5c72-4df2-7c59-be4c-fdd8eb8c308f" xlink:to="loc_srt_MajorCustomersAxis_019f5c72-4df2-74a4-a061-09ce56f089e5" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_NameOfMajorCustomerDomain_019f5c72-4df2-74a4-a061-09ce56f089e5_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_NameOfMajorCustomerDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_MajorCustomersAxis_019f5c72-4df2-74a4-a061-09ce56f089e5" xlink:to="loc_srt_NameOfMajorCustomerDomain_019f5c72-4df2-74a4-a061-09ce56f089e5_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_NameOfMajorCustomerDomain_019f5c72-4df2-7aed-a39f-3aefbdc75e4d" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_NameOfMajorCustomerDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_MajorCustomersAxis_019f5c72-4df2-74a4-a061-09ce56f089e5" xlink:to="loc_srt_NameOfMajorCustomerDomain_019f5c72-4df2-7aed-a39f-3aefbdc75e4d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fgi_LargestCustomerMember_019f5c72-4df2-7581-afb2-da60bfc12f58" xlink:href="fgi-20260630.xsd#fgi_LargestCustomerMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_NameOfMajorCustomerDomain_019f5c72-4df2-7aed-a39f-3aefbdc75e4d" xlink:to="loc_fgi_LargestCustomerMember_019f5c72-4df2-7581-afb2-da60bfc12f58" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fgi_CustomerSecondLargestMember_019f5c72-4df2-7a12-8f29-5f89b7af9c7d" xlink:href="fgi-20260630.xsd#fgi_CustomerSecondLargestMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_NameOfMajorCustomerDomain_019f5c72-4df2-7aed-a39f-3aefbdc75e4d" xlink:to="loc_fgi_CustomerSecondLargestMember_019f5c72-4df2-7a12-8f29-5f89b7af9c7d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fgi_CustomerThirdLargestMember_019f5c72-4df2-7071-8d8f-8a9880684e11" xlink:href="fgi-20260630.xsd#fgi_CustomerThirdLargestMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_NameOfMajorCustomerDomain_019f5c72-4df2-7aed-a39f-3aefbdc75e4d" xlink:to="loc_fgi_CustomerThirdLargestMember_019f5c72-4df2-7071-8d8f-8a9880684e11" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_fgi_CustomerFourthLargestMember_019f5c72-4df2-7cb3-bab3-b9f36f62df4d" xlink:href="fgi-20260630.xsd#fgi_CustomerFourthLargestMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_NameOfMajorCustomerDomain_019f5c72-4df2-7aed-a39f-3aefbdc75e4d" xlink:to="loc_fgi_CustomerFourthLargestMember_019f5c72-4df2-7cb3-bab3-b9f36f62df4d" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskPercentage1_019f5c72-4df2-70d6-a40f-a97d82e452b0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskPercentage1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskLineItems_019f5c72-4df2-741c-8fd9-6a19617f55da" xlink:to="loc_us-gaap_ConcentrationRiskPercentage1_019f5c72-4df2-70d6-a40f-a97d82e452b0" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://fgi-industries.com/role/ConcentrationsofrisksVendorConcentrationRiskDetails" xlink:type="simple" xlink:href="fgi-20260630.xsd#ConcentrationsofrisksVendorConcentrationRiskDetails"/>
  <link:definitionLink xlink:role="http://fgi-industries.com/role/ConcentrationsofrisksVendorConcentrationRiskDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskLineItems_019f5c72-4df2-7574-a8d0-8e0b515577c7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskTable_019f5c72-4df2-7254-807e-51ee661a9b7d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ConcentrationRiskLineItems_019f5c72-4df2-7574-a8d0-8e0b515577c7" xlink:to="loc_us-gaap_ConcentrationRiskTable_019f5c72-4df2-7254-807e-51ee661a9b7d" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_019f5c72-4df2-717c-8c9b-da16216ff932" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskByBenchmarkAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ConcentrationRiskTable_019f5c72-4df2-7254-807e-51ee661a9b7d" xlink:to="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_019f5c72-4df2-717c-8c9b-da16216ff932" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskBenchmarkDomain_019f5c72-4df2-717c-8c9b-da16216ff932_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskBenchmarkDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_019f5c72-4df2-717c-8c9b-da16216ff932" xlink:to="loc_us-gaap_ConcentrationRiskBenchmarkDomain_019f5c72-4df2-717c-8c9b-da16216ff932_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskBenchmarkDomain_019f5c72-4df2-75fc-bad7-5e5e5d92fef9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskBenchmarkDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_019f5c72-4df2-717c-8c9b-da16216ff932" xlink:to="loc_us-gaap_ConcentrationRiskBenchmarkDomain_019f5c72-4df2-75fc-bad7-5e5e5d92fef9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostOfGoodsTotalMember_019f5c72-4df2-7831-b8cd-fb1af56e2b6b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CostOfGoodsTotalMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskBenchmarkDomain_019f5c72-4df2-75fc-bad7-5e5e5d92fef9" xlink:to="loc_us-gaap_CostOfGoodsTotalMember_019f5c72-4df2-7831-b8cd-fb1af56e2b6b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsPayableMember_019f5c72-4df2-7bb1-8543-bbda175fa8e7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccountsPayableMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskBenchmarkDomain_019f5c72-4df2-75fc-bad7-5e5e5d92fef9" xlink:to="loc_us-gaap_AccountsPayableMember_019f5c72-4df2-7bb1-8543-bbda175fa8e7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskByTypeAxis_019f5c72-4df2-73be-9403-ecb8d4153d3c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskByTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ConcentrationRiskTable_019f5c72-4df2-7254-807e-51ee661a9b7d" xlink:to="loc_us-gaap_ConcentrationRiskByTypeAxis_019f5c72-4df2-73be-9403-ecb8d4153d3c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskTypeDomain_019f5c72-4df2-73be-9403-ecb8d4153d3c_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConcentrationRiskByTypeAxis_019f5c72-4df2-73be-9403-ecb8d4153d3c" xlink:to="loc_us-gaap_ConcentrationRiskTypeDomain_019f5c72-4df2-73be-9403-ecb8d4153d3c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskTypeDomain_019f5c72-4df2-7a64-8c4d-7b359cb62a6c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConcentrationRiskByTypeAxis_019f5c72-4df2-73be-9403-ecb8d4153d3c" xlink:to="loc_us-gaap_ConcentrationRiskTypeDomain_019f5c72-4df2-7a64-8c4d-7b359cb62a6c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SupplierConcentrationRiskMember_019f5c72-4df2-72f4-b9b9-a357089a4069" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SupplierConcentrationRiskMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskTypeDomain_019f5c72-4df2-7a64-8c4d-7b359cb62a6c" xlink:to="loc_us-gaap_SupplierConcentrationRiskMember_019f5c72-4df2-72f4-b9b9-a357089a4069" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedGoodsAndNonemployeeServicesTransactionBySupplierAxis_019f5c72-4df2-799e-ab4e-1ecbf376c4e4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedGoodsAndNonemployeeServicesTransactionBySupplierAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ConcentrationRiskTable_019f5c72-4df2-7254-807e-51ee661a9b7d" xlink:to="loc_us-gaap_ShareBasedGoodsAndNonemployeeServicesTransactionBySupplierAxis_019f5c72-4df2-799e-ab4e-1ecbf376c4e4" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedGoodsAndNonemployeeServicesTransactionSupplierDomain_019f5c72-4df2-799e-ab4e-1ecbf376c4e4_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedGoodsAndNonemployeeServicesTransactionSupplierDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ShareBasedGoodsAndNonemployeeServicesTransactionBySupplierAxis_019f5c72-4df2-799e-ab4e-1ecbf376c4e4" xlink:to="loc_us-gaap_ShareBasedGoodsAndNonemployeeServicesTransactionSupplierDomain_019f5c72-4df2-799e-ab4e-1ecbf376c4e4_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedGoodsAndNonemployeeServicesTransactionSupplierDomain_019f5c72-4df2-74b2-b4bf-87ec4017bc43" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedGoodsAndNonemployeeServicesTransactionSupplierDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ShareBasedGoodsAndNonemployeeServicesTransactionBySupplierAxis_019f5c72-4df2-799e-ab4e-1ecbf376c4e4" xlink:to="loc_us-gaap_ShareBasedGoodsAndNonemployeeServicesTransactionSupplierDomain_019f5c72-4df2-74b2-b4bf-87ec4017bc43" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fgi_TangshanHuidaCeramicGroupCo.LtdMember_019f5c72-4df2-76ee-b676-5e449df6bedf" xlink:href="fgi-20260630.xsd#fgi_TangshanHuidaCeramicGroupCo.LtdMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedGoodsAndNonemployeeServicesTransactionSupplierDomain_019f5c72-4df2-74b2-b4bf-87ec4017bc43" xlink:to="loc_fgi_TangshanHuidaCeramicGroupCo.LtdMember_019f5c72-4df2-76ee-b676-5e449df6bedf" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fgi_SupplierSecondLargestMember_019fea1d-e71b-7f72-8e22-0b0850d67ae3" xlink:href="fgi-20260630.xsd#fgi_SupplierSecondLargestMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedGoodsAndNonemployeeServicesTransactionSupplierDomain_019f5c72-4df2-74b2-b4bf-87ec4017bc43" xlink:to="loc_fgi_SupplierSecondLargestMember_019fea1d-e71b-7f72-8e22-0b0850d67ae3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskPercentage1_019f5c72-4df2-73a1-a411-c2c01eaa8117" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskPercentage1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskLineItems_019f5c72-4df2-7574-a8d0-8e0b515577c7" xlink:to="loc_us-gaap_ConcentrationRiskPercentage1_019f5c72-4df2-73a1-a411-c2c01eaa8117" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://fgi-industries.com/role/SegmentinformationScheduleofSegmentFinancialInformationDetails" xlink:type="simple" xlink:href="fgi-20260630.xsd#SegmentinformationScheduleofSegmentFinancialInformationDetails"/>
  <link:definitionLink xlink:role="http://fgi-industries.com/role/SegmentinformationScheduleofSegmentFinancialInformationDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentReportingInformationLineItems_019f5c72-4df2-72ff-b5d7-ea6742106d12" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentReportingInformationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_019f5c72-4df2-7f1d-b614-22b99d02d0cb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019f5c72-4df2-72ff-b5d7-ea6742106d12" xlink:to="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_019f5c72-4df2-7f1d-b614-22b99d02d0cb" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_019f5c72-4df2-7121-9a09-3cd174de21ba" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_019f5c72-4df2-7f1d-b614-22b99d02d0cb" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_019f5c72-4df2-7121-9a09-3cd174de21ba" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_019f5c72-4df2-7121-9a09-3cd174de21ba_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_019f5c72-4df2-7121-9a09-3cd174de21ba" xlink:to="loc_us-gaap_SegmentDomain_019f5c72-4df2-7121-9a09-3cd174de21ba_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_019f5c72-4df2-7c8e-b800-39d5a8686ace" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_019f5c72-4df2-7121-9a09-3cd174de21ba" xlink:to="loc_us-gaap_SegmentDomain_019f5c72-4df2-7c8e-b800-39d5a8686ace" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fgi_KitchenAndBathSegmentMember_019f5c72-4df2-7ab0-aa8d-d36ecd97b728" xlink:href="fgi-20260630.xsd#fgi_KitchenAndBathSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019f5c72-4df2-7c8e-b800-39d5a8686ace" xlink:to="loc_fgi_KitchenAndBathSegmentMember_019f5c72-4df2-7ab0-aa8d-d36ecd97b728" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsAxis_019f5c72-4df2-70c7-b029-c8c2378d01de" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidationItemsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_019f5c72-4df2-7f1d-b614-22b99d02d0cb" xlink:to="loc_srt_ConsolidationItemsAxis_019f5c72-4df2-70c7-b029-c8c2378d01de" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_019f5c72-4df2-70c7-b029-c8c2378d01de_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidationItemsAxis_019f5c72-4df2-70c7-b029-c8c2378d01de" xlink:to="loc_srt_ConsolidationItemsDomain_019f5c72-4df2-70c7-b029-c8c2378d01de_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_019f5c72-4df2-7e78-baef-8ecc0de608c6" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidationItemsAxis_019f5c72-4df2-70c7-b029-c8c2378d01de" xlink:to="loc_srt_ConsolidationItemsDomain_019f5c72-4df2-7e78-baef-8ecc0de608c6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingSegmentsMember_019f5c72-4df2-7ea1-a391-b531e34abbb9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingSegmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_019f5c72-4df2-7e78-baef-8ecc0de608c6" xlink:to="loc_us-gaap_OperatingSegmentsMember_019f5c72-4df2-7ea1-a391-b531e34abbb9" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MaterialReconcilingItemsMember_019f5c72-4df2-74e1-8b72-43b8a5e6413d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MaterialReconcilingItemsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_019f5c72-4df2-7e78-baef-8ecc0de608c6" xlink:to="loc_us-gaap_MaterialReconcilingItemsMember_019f5c72-4df2-74e1-8b72-43b8a5e6413d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_019f5c72-4df2-7ada-9604-f771dc41b0d8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019f5c72-4df2-72ff-b5d7-ea6742106d12" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_019f5c72-4df2-7ada-9604-f771dc41b0d8" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostOfRevenue_019f5c72-4df2-77ec-addf-139df08acb86" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CostOfRevenue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019f5c72-4df2-72ff-b5d7-ea6742106d12" xlink:to="loc_us-gaap_CostOfRevenue_019f5c72-4df2-77ec-addf-139df08acb86" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SellingAndMarketingExpense_019f5c72-4df2-76e7-90b4-6c8ddb63448d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SellingAndMarketingExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019f5c72-4df2-72ff-b5d7-ea6742106d12" xlink:to="loc_us-gaap_SellingAndMarketingExpense_019f5c72-4df2-76e7-90b4-6c8ddb63448d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GeneralAndAdministrativeExpense_019f5c72-4df2-71d6-8b80-3710b8e58c04" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GeneralAndAdministrativeExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019f5c72-4df2-72ff-b5d7-ea6742106d12" xlink:to="loc_us-gaap_GeneralAndAdministrativeExpense_019f5c72-4df2-71d6-8b80-3710b8e58c04" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ResearchAndDevelopmentExpense_019f5c72-4df2-7a29-adb4-8080275c3c1f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ResearchAndDevelopmentExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019f5c72-4df2-72ff-b5d7-ea6742106d12" xlink:to="loc_us-gaap_ResearchAndDevelopmentExpense_019f5c72-4df2-7a29-adb4-8080275c3c1f" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentReportingOtherItemAmount_019f5c72-4df2-7bb4-b86d-092e5dfaeceb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentReportingOtherItemAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019f5c72-4df2-72ff-b5d7-ea6742106d12" xlink:to="loc_us-gaap_SegmentReportingOtherItemAmount_019f5c72-4df2-7bb4-b86d-092e5dfaeceb" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_019f5c72-4df2-7aae-8ab2-1e1464d3e224" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeTaxExpenseBenefit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019f5c72-4df2-72ff-b5d7-ea6742106d12" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_019f5c72-4df2-7aae-8ab2-1e1464d3e224" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProfitLoss_019f5c72-4df2-7e40-836a-b27454657fb1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProfitLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019f5c72-4df2-72ff-b5d7-ea6742106d12" xlink:to="loc_us-gaap_ProfitLoss_019f5c72-4df2-7e40-836a-b27454657fb1" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_fgi_AdjustmentsAndReconcilingItems_019f5c72-4df2-765a-9da9-62180dcea419" xlink:href="fgi-20260630.xsd#fgi_AdjustmentsAndReconcilingItems"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019f5c72-4df2-72ff-b5d7-ea6742106d12" xlink:to="loc_fgi_AdjustmentsAndReconcilingItems_019f5c72-4df2-765a-9da9-62180dcea419" xlink:type="arc" order="8"/>
  </link:definitionLink>
</link:linkbase>
