| Acronym | Definition |
|---|
| RBAA | risk-based audit approach |
| RBAA | Race-Based Affirmative Action |
| RBAA | Red Barn Alumni Association (Louisville, KY) |
| RBAA | Russian Business Aviation Association |
| RBAA | Red Bud Athletic Association (Redbud, IL) |
| RBAA | Reserve Brigade Australian Artillery |
| RBAA | Right to Bear Arms Amendment |
| RBAA | Rensselaer Baseball Alumni Association |
| RBAA | Rare Bird Alert Archives |
| RBAA | Risk-Based Assurance and Acceptance |
| RBAA | Regional Business Achievers Award (South Africa) |
| RBAA | Regelen Beroepsuitoefening Accountants-Administratieconsulenten |
| RBAA | Reaction Byproducts of Ammonia and 2-Aminoethanol |
| RBAA | Roger Bacon Alumni Association (Roger Bacon High School; Cincinnati, Ohio) |
| RBAA | Reality-Based Accuracy Assessment |
| RBAA | Redcoat Band Alumni Association (Athens, Georgia) |
| RBAA | Regional Biosafety Advisory Authority |
| RBAA | Red and Blue Alliance Army (Club Penguin Army) |
| RBAA | Rochester-Bern Alumni Association |