| Acronym | Definition |
|---|
| TDF | Tour de France |
| TDF | Tour de Fleece (yarn spinning event) |
| TDF | Theatre Development Fund |
| TDF | Tire Derived Fuel |
| TDF | The Downtown Fiction (band) |
| TDF | Tool Definition File |
| TDF | Template Description File |
| TDF | Timeout Decrease Factor |
| TDF | Tracking Data Formatter |
| TDF | Transmission Decrease Factor |
| TDF | Transaction Data Format |
| TDF | Trace Definition File |
| TDF | Typeface Definition File |
| TDF | Tab Delimited Format |
| TDF | Title Definition Format |
| TDF | Traffic Detection Function (wireless technology) |
| TDF | Télédiffusion de France (French radio and TV transmission company) |
| TDF | To Die For |
| TDF | Tour de Force |
| TDF | Target Date Fund (retirement investment option) |
| TDF | Tropical Disease Foundation (est. 1984; Philippines) |
| TDF | Testis-Determining Factor |
| TDF | Total Dietary Fiber |
| TDF | Templeton Dragon Fund (Singapore) |
| TDF | Theatre, Dance & Film (various schools) |
| TDF | Technology Development Foundation |
| TDF | The Disability Foundation (UK) |
| TDF | Transportation Development Foundation |
| TDF | The Dhol Foundation (UK drummers) |
| TDF | Toronto Documentary Forum (Canada) |
| TDF | Telangana Development Forum (Bridgewater, NJ) |
| TDF | Tactical Display Framework (Java visualization tool) |
| TDF | Time Differential Factor |
| TDF | Tokyo Dark Fest |
| TDF | Toll Domestic Forwarding (Toll Group; various locations) |
| TDF | Terrestrial Defense Force |
| TDF | Technopreneur Development Flagship (Multimedia Super Corridor) |
| TDF | Training Directors' Forum |
| TDF | Tactical Digital Facsimile |
| TDF | Transcript-Derived Fragment |
| TDF | Text Definition File |
| TDF | Troubles Digestifs Fonctionnels (French: Functional Digestive Disorders) |
| TDF | Territorial Defence Force |
| TDF | Transportable Document Format |
| TDF | The Daemon Forum (online forum) |
| TDF | Telecommunication Development Fund (Afghanistan) |
| TDF | Trunk Distribution Frame |
| TDF | Turkish Democracy Foundation |
| TDF | The Digital Filmmaker |
| TDF | Treatment Development Facility |
| TDF | Test Data Folder |
| TDF | Technical Direction Form |
| TDF | Terminal Data Flow |
| TDF | Thermal Dispersion Flow |
| TDF | Top Dryness Factor |
| TDF | Topaz Designs Forum |
| TDF | Tactical Data Fusion |
| TDF | Timed Data Flow (SystemC AMS) |