| Acronym | Definition |
|---|
| UT | Utah (US postal abbreviation) |
| UT | University of Tennessee |
| UT | University of Texas |
| UT | University of Tampa (Florida) |
| UT | Utility |
| UT | University of Toledo (Ohio) |
| UT | University of Toronto |
| UT | Universal Time (Greenwich Mean Time) |
| UT | Undertale (gaming) |
| UT | Unreal Tournament (game) |
| UT | Urban Terror (Quake III Arena modification) |
| UT | Up Time |
| UT | Union Tribune (San Diego, CA newspaper) |
| UT | (San Diego) Union Tribune (the Copley Newspaper known as the "U-T") |
| UT | Ultrasonic Testing |
| UT | Use Tax |
| UT | Utility Vehicle |
| UT | Urinary Tract |
| UT | University of Twente (Netherlands) |
| UT | Uma Thurman (actress) |
| UT | Union Territory (India) |
| UT | Undertaker (pro wrestler) |
| UT | Universiteit Twente |
| UT | University of Tokyo |
| UT | University of Tehran |
| UT | University of Tartu (Estonia) |
| UT | United States to United Kingdom (routing designation; US Navy) |
| UT | Unit Test |
| UT | United Together |
| UT | Underwriters' Laboratories |
| UT | Unified Theory |
| UT | Utility Player (baseball) |
| UT | Universal Translator (Internet) |
| UT | User Testing |
| UT | Umbilical Tower (US NASA) |
| UT | Upper Troposphere |
| UT | Université de Technologie (French: University of Technology) |
| UT | Ultrasonic Transducer |
| UT | User Test |
| UT | User Terminal |
| UT | Urinetown (musical) |
| UT | University of Trento (Trento, Italy) |
| UT | Unfinished Tales (book by JRR Tolkien) |
| UT | Ubiquitous They (comedy troupe; Seattle, WA) |
| UT | Unauthorized Trading |
| UT | Upper Tester |
| UT | Unique Tech (Age of Kings: The Conquerors Expansion, Microsoft game) |
| UT | Uncollected Tax (on tip wages; IRS) |
| UT | Unexcused Tardy |
| UT | Unit Trainer |
| UT | Unité Technique (French: Technical Unit) |
| UT | Unterer Totpunkt (German: Bottom Dead Center) |
| UT | Utopia Temple |
| UT | Uber Tristram (gaming, Diablo II) |
| UT | Utah Ordnance Plant (Cartridge Headstamp) |
| UT | Ulstein Trading (Norway) |
| UT | Underway Trial |
| UT | Unitrade Specialized Canada Catalog (philatelic catalog) |
| UT | (USN Rating) Utilitiesman |
| UT | Un-Authorized Traversal |