| Acronym | Definition |
|---|
| ACRN | America's Career Resource Network |
| ACRN | Accounting Classification Reference Number |
| ACRN | Asthma Clinical Research Network (National Heart, Lung and Blood Institute) |
| ACRN | AIDS Certified Registered Nurse |
| ACRN | Les Amis de la Cathédrale Russe de Nice (French: Friends of the Russian Cathedral in Nice; Nice, France) |
| ACRN | All Campus Radio Network (Ohio University) |
| ACRN | Acoustic Coordinated Reset Neuromodulation (tinnitus treatment) |
| ACRN | American Country Radio Network (Internet radio) |
| ACRN | Aéro-Club de Rouen Normandie (French aviation club; Normandy, France) |
| ACRN | Académie Chrétienne de la Rive Nord (French: North Shore Christian Academy; Canada) |