| Acronym | Definition |
|---|
| TEF | Teaching Excellence Framework (education; UK) |
| TEF | Trace Elements in Food (symposium) |
| TEF | Tourism and Environment Forum (Scotland, UK) |
| TEF | Texas Enterprise Fund |
| TEF | Tracheoesophageal Fistula |
| TEF | Test d'Evaluation de Français (French: Evaluation Test of French; language assessment test) |
| TEF | Thermic Effect of Food |
| TEF | The Enchanted Forest |
| TEF | Transcriptional Enhancer Factor |
| TEF | Transfert Electronique de Fonds (French: Electronic Funds Transfer) |
| TEF | Toxicity Equivalency Factor |
| TEF | Time-Energy-Frequency (acoustics) |
| TEF | Tritium Extraction Facility |
| TEF | The Engineering Framework (SmartPlant Foundation) |
| TEF | Transportation Enhancement Fund (various locations) |
| TEF | Transient Energy Function |
| TEF | The Elite Force |
| TEF | Toilet Extract Fan |
| TEF | Trailing Edge Flap |
| TEF | Tax Elected Fund (UK) |
| TEF | Thermoelectric Freezer |
| TEF | Testing Effort Function |
| TEF | Test and Evaluation Facility |
| TEF | Thermal Electric Freezer |
| TEF | Thermo-Electric Fan |
| TEF | The Enterprise Foundation |
| TEF | TARP Echo Function |
| TEF | Tonnes of Equivalent Fuel |
| TEF | Transverse Electric Field |
| TEF | Threat Evaluation Function |
| TEF | Top Entry Flanged (ball type valves) |
| TEF | Total Experiential Field |
| TEF | Total Equipment Failure |
| TEF | Terrain Exposure Factor |
| TEF | Technical Evaluation Forum |