| Abbreviation | Definition |
|---|---|
| AR | Any Road |
| AR | Apocalypse Rifle |
| AR | Apologetic Resources |
| AR | Apologetics Resources |
| AR | Applied Rule |
| AR | Aqua Regia |
| AR | AR15 Rifle |
| AR | Area Reference |
| AR | Argentina AR |
| AR | Argon AR |
| AR | Arkansas Resident |
| AR | Arkansas Rom |
| AR | Arm Of Resistance |
| AR | ArmaLite ArmaLite |
| AR | Armalite Rifle |
| AR | Armand Rapha |
| AR | Armilite Rifle |
| AR | Aromatic Ring |
| AR | Artificial Resuscitation |
| AR | As Required |