| Acronym | Definition |
|---|
| OSAA➣Oregon School Activities Association |
| OSAA➣Office of the Special Adviser on Africa (United Nations body) |
| OSAA➣Operational Support Airlift Agency |
| OSAA➣Office of the Sergeant-At-Arms (Philippines) |
| OSAA➣Ocean State Aquaculture Association |
| OSAA➣Operational Satellite Active Archive |