| Acronym | Definition |
|---|
| AAN | American Academy of Neurology |
| AAN | American Academy of Nursing |
| AAN | Association of Alternative Newsweeklies |
| AAN | Army After Next |
| AAN | Access Area Network |
| AAN | American Association of Nurserymen |
| AAN | Archaeological Association of Nigeria |
| AAN | Australian Association of Neurologists |
| AAN | Action Alert Network (International Freedom of Expression Exchange) |
| AAN | Annuaire de l'Afrique du Nord (French: North African Directory; publication) |
| AAN | Agency Action Notice (document) |
| AAN | All Area Network |
| AAN | All About Nothing (gaming) |
| AAN | American Academy of Nutrition |
| AAN | Application-Aware Network (AT&T) |
| AAN | Air Ambulance Network |
| AAN | Active Antenna Node |
| AAN | Asemblea Atlantico del Nord (North Atlantic Assembly; NATO) |
| AAN | Activity Accounting Number |
| AAN | Assignment Action Number (US Air Force) |
| AAN | AIDS-Acquired Immune Deficiency Syndrome Associated Neutropenia |