AAV or Aav may refer to:

Aviation

  • Anomalous Aerial Vehicle, a military term for an unidentified flying object
  • Anti-aircraft vehicle, or self-propelled anti-aircraft weapon
  • IATA airport code for Allah Valley Airport in Soccsksargen Region, Philippines

Businesses

  • Advantage Oil & Gas Ltd., a Canadian oil and gas company
  • Arab American Vehicles, a car assembler in Egypt
  • Armstrong Studios, an Australian recording studio later renamed AAV

Language

  • African American Vernacular English
  • Austroasiatic languages, a language group of Southeast Asia

Military

  • Assault Amphibious Vehicle or Amphibious Assault Vehicle, an amphibious tracked vehicle

People

  • Aav (surname), Estonian surname
  • Aníbal Acevedo Vilá, governor of Puerto Rico (2005-2008)

Other uses

  • Adeno-associated virus, a nonpathogenic virus used as a gene therapy tool
  • Air admittance valve, a valve in a drain-waste-vent system
  • Aire d'attraction d'une ville, a metropolitan statistical area used by the French national statistics office INSEE
  • Another Angry Voice, a British political blog
  • Vatican Apostolic Archive, Latin: Archivum Apostolicum Vaticanum