| Acronym | Definition |
|---|
| TFI | Towarzystwo Funduszy Inwestycyjnych (Polish investment company) |
| TFI | The Fifth Inning (E. Ethelbert Miller memoir) |
| TFI | Tribeca Film Institute (New York, NY) |
| TFI | Test de Français International (French language proficiency test) |
| TFI | Tobacco Free Initiative (World Health Organization) |
| TFI | Teach for India (Teach for All network) |
| TFI | Transcription Factor I |
| TFI | The Fertilizer Institute |
| TFI | The Franklin Institute (Philadelphia, Pennsylvania) |
| TFI | Office of Terrorism and Financial Intelligence (US government) |
| TFI | Trade, Finance and Investment (various locations) |
| TFI | The Focusing Institute (Spring Valley, NY) |
| TFI | Technology Futures, Inc. |
| TFI | Total Force Integration |
| TFI | Taxable Fixed Income |
| TFI | The Family International (est. 1968) |
| TFI | Time from Ignition (US NASA) |
| TFI | Terminal Facility Identifier |
| TFI | Total Freight International (UK) |
| TFI | Tubal Factor Infertility |
| TFI | Total Force Initiative (US DoD) |
| TFI | The First Immortal (James L. Halperin science fiction novel) |
| TFI | Time-Frequency Interleaving |
| TFI | Thin-Film Inductive |
| TFI | Temporary Flow Identity |
| TFI | True Finder Integration |
| TFI | Task Force Iron |
| TFI | Thick Film Integrated Ignition (Ford) |
| TFI | Thin-Film Imaging |
| TFI | T Foley Interiors (UK) |
| TFI | Task Force Innovations (construction management provider; Los Angeles, CA) |
| TFI | Thanks for Info |
| TFI | Team France Inshore (boat racing group) |
| TFI | Temporary Funding Increase |
| TFI | Terminal Flight Information |
| TFI | Topside Fabrication and Installation (oil installation) |