| Abbreviation | Definition |
|---|---|
| AMBRS | A M Best Rating Services |
| AMBRS | Active Magnetic Bearing Rotor System |
| AMBT | Accelerated Mortar Bar Test |
| AMBT | Action Must Be Taken |
| AMBT | Ambten |
| AMBU | Advanced Materials Business Unit |
| AMBU | Air Mask Bag Unit |
| AMBU | ambulatory manual breathing unit |
| AMBU | Artificial Manual Breathing Unit |
| AMBU | Automated Manual Breathing Unit |
| AMBUSH | Academics Manhood Brotherhood Unity Service and Honor |
| AMBUSH | ambushed |
| AMBW | Albers Mind Body Wellness |
| AMBW | All My Best Wishes |
| AMBW | Amalgamated Meatcutters and Butcher Workmen |
| AMBW | Asian Man Black Woman |
| AMC | A Magnificent Car |
| AMC | A Ministry To Chiropractors |
| AMC | A Motherfucking Cockhater |
| AMC | Active Massive and Current |