| Abbreviation | Definition |
|---|---|
| AA | Anti-Aircraft |
| AA | Anti-Armor |
| AA | Appointing Authority |
| AA | Aptitude Area |
| AA | Armor Attachment |
| AA | Armored Ambulance |
| AA | Armored Assault |
| AA | Army Act |
| AA | Assembly Area |
| AA | Assessment Agent |
| AA | Attack Assessment |
| AA | Auto Assault |
| AA | Automatic Answer |
| AA | Avenue of Approach |
| AA&E | Arms, Ammunition, and Explosives |
| AA-10 | Alamo Missile |
| AA-11 | Archer Missile |
| AA-2 | Atoll Missile |
| AA-3 | Anab Missile |
| AA-5 | Ash Missile |