may mean:
- AAR Corporation , an American aviation engineering company
- Aarhus Airport (IATA airport code: AAR) in Kolind, Denmark
- Air-to-air Refueling (redirects to Aerial Refueling ), the practice of transferring fuel from one aircraft to another during flight
- Afar Language ( ISO 639 identification code: AAR)
- After Action Review , a structured review process used by the U.S. military
- Air America Radio , a domestic United States radio network
- The All-American Rejects , an American emo/pop punk band
- American Academy Of Religion , an association of academics who research or teach topics related to religion
- Anime Academy Radio , an internet radio station specializing in J-Pop, J-Rock, and Anime music
- The Association For Automated Reasoning , a non-profit that seeks to advance the field of automated reasoning
- Association Of American Railroads , an industry trade group representing the freight railroads of North America
==See also
- Aar , a river in Switzerland.
|