| Acronym | Definition |
|---|
| UD➣Update |
| UD➣University of Dayton (Dayton, OH) |
| UD➣University of Delaware |
| UD➣Unanimous Decision |
| UD➣Usted (Spanish: Formal You) |
| UD➣Urban Dictionary (slang web site) |
| UD➣Upper Deck |
| UD➣Udine (Friuli Venezia Giulia, Italy) |
| UD➣Universal Design |
| UD➣University of Dallas (Irving, TX, USA) |
| UD➣Utility Dog |
| UD➣Undisclosed |
| UD➣Undead (gaming) |
| UD➣User Defined |
| UD➣Usaha Dagang (Indonesian trading company) |
| UD➣Utenriksdepartementet (Department of Foreign Affairs) |
| UD➣Upper Division |
| UD➣Up/Down |
| UD➣Under Development |
| UD➣Unidirectional |
| UD➣Unified Defense |
| UD➣Uniform Design (mathematics) |
| UD➣University of Dubuque (Iowa) |
| UD➣Ugly Duckling (band) |
| UD➣Universal Declaration of Human Rights (UN; also seen as UDHR) |
| UD➣University of Denver |
| UD➣User Domain |
| UD➣Under Duress |
| UD➣Urban District |
| UD➣University of Detroit |
| UD➣Unlawful Detainer |
| UD➣Unión Democrática (Spanish: Democratic Union) |
| UD➣Underdark (roleplaying games, Dungeons & Dragons) |
| UD➣United Defense |
| UD➣Ultimate Doom (game) |
| UD➣Universitair Docent |
| UD➣United Devices, Inc. |
| UD➣Underwater Demolition |
| UD➣Ultimate Disney (website) |
| UD➣Underwater Diving |
| UD➣Unit Diary |
| UD➣Undesirable Discharge |
| UD➣United Diesel |
| UD➣Universal Default |
| UD➣Utility Degree (AKC Obedience Degree) |
| UD➣Ut Dictum (Latin: As Directed) |
| UD➣Under Defeat (game) |
| UD➣Utility Driver |
| UD➣Unidoom (gaming clan) |
| UD➣Uniquely-Decodable |
| UD➣Uniquely Decipherable |
| UD➣Utilisation Declaration |
| UD➣Unitary District (UK) |
| UD➣Ulcerative Dermatosis |
| UD➣Unit Designator |
| UD➣Urban Disease |
| UD➣Unofficially Dropped (grading system) |
| UD➣Unable to Approve Departure for the Time Specified |
| UD➣Unabsorbed Depreciation (accounting/finance) |
| UD➣Unremove Directory (Norton Utilities) |
| UD➣Under Digging (pipeline construction) |
| UD➣UltraDiagnostics (South Attleboro, MA) |