| Abbreviation | Definition |
|---|---|
| AO | Athol Orange |
| AO | Audi Only |
| AO | Audi Option |
| AO | Authorize Only |
| AO | Auto Ordnance |
| AO | Automags Online |
| AO | Auxiliary Oiler |
| AO | Auxillary Oiler |
| AO | aviatsionnaya oskolochnaya |
| AOA | Accelerator Of Accelerators |
| AOA | Accuracy of Acceptance |
| AOA | Ace of Angels |
| AOA | Ace of Angles |
| AOA | Acronym On the Abbreviations |
| AOA | acronym or abbreviation |
| AOA | Active Older Adult |
| AOA | Active Older Adults |
| AOA | activity on arc |
| AOA | activity on arrow |
| AOA | Adidas Only Addiction |