| Acronym | Definition |
|---|
| TDL | Texas Digital Library (est. 2005) |
| TDL | Tokyo Disneyland |
| TDL | to Do List |
| TDL | Tunnel Diode Logic |
| TDL | Tactical Data Link |
| TDL | To-Do List |
| TDL | Tunable Diode Laser (spectroscopy) |
| TDL | Technology and Distance Learning |
| TDL | Toxic Dose Low |
| TDL | Techniques Development Laboratory |
| TDL | Template Definition Language |
| TDL | True Divided Light (windows) |
| TDL | The Diamond Lane (website hosting company; Hayward, CA) |
| TDL | Tim Donut Ltd. |
| TDL | The Dead Lovers (band) |
| TDL | Texas Driver License |
| TDL | Tally Developer Language (Tally Solutions Pvt. Ltd.) |
| TDL | Technology Development Laboratory |
| TDL | Test Description Language |
| TDL | Tau Dither Loop |
| TDL | Tap Delay Line |
| TDL | Technical Direction Letter |
| TDL | Target Detection Limit |
| TDL | Tunnel-Diode Logic |
| TDL | Thin Dark Line (band, Baltimore, Maryland) |
| TDL | Training Data Link |
| TDL | Treindienstleider (Dutch) |
| TDL | Task Direction Letter |
| TDL | Transparent Datalink |
| TDL | Transformation Definition Language |
| TDL | Too Damn Lazy |
| TDL | Tactical Down Link |
| TDL | Trusted Delivery Layer (electronic commerce) |
| TDL | Treatment and Disposition Log |
| TDL | The Dragon Lady |
| TDL | Timing Description Language (computer programming) |
| TDL | Tegas Design Language |
| TDL | Technology Delivered Learning |
| TDL | Tana del Ladro |
| TDL | Territoires de Développement Local (French: Territories of Local Development; France) |
| TDL | Technique Désenfumage Lanterneaux (French: Technical Smoke Skylights; France) |
| TDL | Temperature Dependant Loss (various sciences) |
| TDL | Tiadinil |