| Acronym | Definition |
|---|
| HAAA➣Harvard Arab Alumni Association |
| HAAA➣Henderson Area Arts Alliance |
| HAAA➣Halifax Area Advertising Authority |
| HAAA➣Hepatitis-Associated Aplastic Anemia (disorder) |
| HAAA➣Halton Aircraft Apprentice Association (UK) |
| HAAA➣Heritage Area Agency on Aging (Cedar Rapids, IA) |
| HAAA➣Hypo Auditory Aesthetic Aphasia |