AAR or Aar may refer to:
Aviation
- AAR Corporation, an American aviation engineering company
- Air-to-air refueling, the process of transferring aviation fuel from one military aircraft to another during flight
- IATA airport code for Aarhus Airport in Mid Jutland Region, Denmark
- ICAO airline code for Asiana Airlines of South Korea
Geography
- Aar, a river in Switzerland, tributary of the Rhine
- Aar (Lahn), a tributary of Lahn river in Germany, descending from the Taunus mountains
- Aar (Dill), a tributary of Dill river in Germany, also in the basin of the Lahn
- Aar (Ill), a branch of the Ill river that separates from it in Strasbourg, France and rejoins it further north
- Aar (Twiste), a tributary of Twiste river in Germany, in the basin of the Weser
- Aar (village), a village in Rajasthan, India
- South American–Antarctic Ridge, also known as the American–Antarctic Ridge, a mid-ocean ridge in the South Atlantic
- Antarctica, IAAF code AAR
Military
- After-action review, a structured review process used by the U.S. military
- After action report, a retrospective analysis
- Assistant Automatic Rifleman, a soldier who carries ammunition, see Rifleman#Modern_tactics.
Organizations
- All American Racers, a former Formula 1 and CART team
- Allens (law firm), a law firm (formerly known as Allens Arthur Robinson)
- American Academy in Rome, research and arts institution in Rome
- American Academy of Religion, an association of academics who research or teach topics related to religion
- 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 railroads of North America
Transportation
- AAR coupling, railway coupling specification of the Association of American Railroads
- AAR wheel arrangement, Association of American Railroads system for describing wheel arrangement of locomotives
- All-American Road, a designation for some national scenic byways in the United States
- Ann Arbor Railroad (disambiguation)
Other uses
- Aar (Star Wars), fictional planet in Star Wars universe
- Aar, a fictional planet of the star Deneb, in the "Captain Future" stories
- The All-American Rejects, an American rock band
- Air America Radio, a domestic United States radio network
- Average accounting return, a capital budgeting investment rule
- Adam's apple reduction, a surgery
- Afar language (ISO 639 language identification code)
- African American Review, a journal
- Amino acid response, the biochemical response of a mammalian cell starved of amino acids
- "At any rate", see List of SMS abbreviations
- Alkali–aggregate reaction, a chemical reaction leading to expansion in concrete
See also
- Ahr, a river in Germany, tributary of the Rhine
- Aare (disambiguation)
This disambiguation page lists articles associated with the title AAR.If an internal link led you here, you may wish to change the link to point directly to the intended article. Categories: