| Acronym | Definition |
|---|
| TAT | Tourism Authority of Thailand |
| TAT | Tattoo |
| TAT | Think About That (band) |
| TAT | Time After Time (song) |
| TAT | Tapas Acupressure Technique |
| TAT | Thematic Apperception Test |
| TAT | Turn Around Time |
| TAT | The Astonishing Tribe (Sweden) |
| TAT | Tyrosine Aminotransferase |
| TAT | Tiffani-Amber Thiessen |
| TAT | Tired All the Time (medical shorthand) |
| TAT | Three Affiliated Tribes |
| TAT | Technical Assistance Team |
| TAT | Trans-America Trail (off-road jeep/motorcyce trail) |
| TAT | Tetanus Antitoxin |
| TAT | Transient Accommodations Tax |
| TAT | Testing and Training (SW Development and QA Testing) |
| TAT | Thrombin-Antithrombin Complex |
| TAT | Transactivator of Transcription (HIV protein) |
| TAT | Total Air Temperature |
| TAT | Trans-Atlantic Telephone cable |
| TAT | Take Action Tour (music) |
| TAT | Theoretical Arrival Time |
| TAT | Touraine Air Transport (airline) |
| TAT | To Accompany Troops |
| TAT | Ti Amo Tanto (Italian: I love you a lot) |
| TAT | Transitional Automated Ticket (airlines) |
| TAT | Transport Aérien Transrégional (French: Regional Air Transport) |
| TAT | Tatry/Poprad, Slovakia - Tatry/Poprad (Airport Code) |
| TAT | Tactical Analysis Team |
| TAT | Technical Area Task (US government contracts) |
| TAT | Technical Assessment Team |
| TAT | Termination Attempt Trigger |
| TAT | Télévision Analogique Terrestre (French: Analogue Terrestrial Television) |
| TAT | Truth and Transmission (Foundation) |
| TAT | Terrorist Action Team |
| TAT | Technology Applications Team |
| TAT | Test Auto Test |
| TAT | Tyumen Avia Trans |
| TAT | Tactical Airsoft Team |
| TAT | Totally Antisymmetric Tensor |
| TAT | Two-Axis Tracking |
| TAT | Transgenic Arthropod Team |
| TAT | Teens Against Television |
| TAT | Totally Awesome Trip (slang) |
| TAT | Tactical Airlift Technology |
| TAT | Timed Automata with Tasks |
| TAT | Test Analysis Table |
| TAT | Time for Average Turnaround |
| TAT | Transportation and Ammunition Tracking |
| TAT | Teenage Travelers (Family Motor Coach Association) |
| TAT | Thermally-Activated Time-Dependent (reliability model) |
| TAT | Turbine Air Temperature |
| TAT | Teledramatic Arts and Technologies (California State University, Monterey Bay) |
| TAT | Technical Assistance in Telecom Sector (India) |