| Acronym | Definition |
|---|
| TGI➣Tribunal de Grande Instance (French: High Court) |
| TGI➣Triumph Group Inc. |
| TGI➣TIGR (The Institute for Genomic Research) Gene Index |
| TGI➣Target Group Index |
| TGI➣Tower Group, Inc. (New York) |
| TGI➣Tracheal Gas Insufflation |
| TGI➣Terasen Gas, Inc. (Canada) |
| TGI➣Trumpet Geeks International (resource) |
| TGI➣Thank God It's Friday (US restaurant chain) |
| TGI➣Teaching Goals Inventory (various schools) |
| TGI➣The Governance Institute (San Diego, CA) |
| TGI➣Tumor Growth Inhibition |
| TGI➣Tobacco Genome Initiative |
| TGI➣Targus Group International (various locations) |
| TGI➣Trato Gastrointestinal (Portugese) |
| TGI➣The Game Initiative |
| TGI➣Tide Gauge Inspectorate |
| TGI➣IEEE 802.11i Task Group |
| TGI➣Tôlerie Ganaye Industrie (French: Ganaye Sheet Metal Industry) |
| TGI➣Talent Growth International (India) |
| TGI➣Task Group Instruction (US Navy) |
| TGI➣Thyroid Growth-stimulating Immunoglobulin |
| TGI➣Transportadora de Gas del Interior SA (Colombia) |
| TGI➣Tire Guides, Inc. |
| TGI➣Travel Guard International Insurance Brokerage, Inc. |
| TGI➣Task Group Index |
| TGI➣Technical Guidance Instruction |
| TGI➣Techniques Gestion Informatique (French: Technical Information Management) |
| TGI➣Temperature Growth Index |