| Abbreviation | Definition |
|---|---|
| UA | Unit Authorization |
| UA | Unit Availability |
| UA | Unit of Account |
| UA | Universal Army |
| UA | Universe of Actions |
| UA | Unlimited Ammo |
| UA | Unmanned Aircraft |
| UAC | Unlimited Ammo Community |
| UAD | Updated Authorization Document |
| UAF | Ukrainian Armed Forces |
| UAF | Union Air Force |
| UAF | User Account File |
| UAID | Unified Asian Intelligence Database |
| UAL | UnAttached List |
| UALS | Universal Ammunition Loading System |
| UAM | Underwater-to-Air Missile |
| UANF | United Achik National Front |
| UAOBS | Upper Air Observation |
| UAP | Unidentified Aerial Phenomena |
| UAP | Unidentified Aerial Phenomenon |