| Abbreviation | Definition |
|---|---|
| AGR | Active Guard/Reserve |
| AGRA | Army Group Rocket Artillery |
| AGRA | Army Group Royal Artillery |
| AGRAM | Army Group Royal Artillery Mounted |
| AGREEMT | Agreement |
| AGRIA | United States Army Garrison Rock Island Arsenal |
| AGS | Advanced Gunnery System |
| AGS | Armored Gun System |
| AGS | Aviation Ground Support |
| AGSE | Aviation Ground Support Equipment |
| AGSM | American Gold Star Mother |
| AGSMO | Army Governance and Strategy Management Office |
| AGT | Above Ground Test |
| AGT | Advanced Gatling Turret |
| AGT | AEELS (Automated ELINT (Electronic Intelligence) Emitter Location System) Ground Terminal |
| AGT | AEELS Ground Terminal |
| AGTELIS | Automatic Group Transportable Emitter Location and ID System |
| AGTELIS | Automatic Group Transportable Emitter Location and Identification System |
| AGTP | Additional Ground Training Period |
| AGTS | Advanced Gunnery Training System |