| Acronym | Definition |
|---|
| AIIR | Airborne Infection Isolation Room |
| AIIR | All India Internet Radio |
| AIIR | Air Intelligence Information Report (National Investigation Committee on Aerial Phenomena) |
| AIIR | Association des Ingénieurs de l'INSA (Institut National des Sciences Appliquées) de Rennes (French engineers association) |
| AIIR | Associazione Imprenditori Italiani in Romania (Italian: Association of Italian Entrepreneurs in Romania) |
| AIIR | Artists International Independent Radio (Internet radio) |
| AIIR | Advanced Innovative Interdisciplinary Research (Virginia) |