| Abbreviation | Definition |
|---|---|
| UEV | Universal Electric Vehicle |
| UF | Ultimate Force |
| UFAQ | Unit/Formation Ammunition Qantity |
| UFC | Unified Facilities Criteria |
| UFD | Unidentified Flags and Ensigns |
| UFD | Universal Firing Device |
| UFD | User Functional Description |
| UFDD | Union of Forces for Democracy and Development |
| UFE | UniForm Evaluation |
| UFER | Concrete Encased Electrode |
| UFF | United Frag Force |
| UFH | Ultralightweight Field Howitzer |
| UFH | Undue Fire Hazard |
| UFH | Unsung First Heroes |
| UFK | Uppsala Flying Club |
| UFL | Ulchi Focus Lens (exercise) |
| UFN | Until Further Notice |
| UFO | UHF (Ultra-High Frequency) Follow-On |
| UFO | Ultrahigh Frequency Follow-On |
| UFO | Unknown, Forgotten, and Overlooked |