Avi or AVI may refer to:
An aviation accident is defined by the Convention on International Civil Aviation Annex 13 as an occurrence associated with the operation of an aircraft, which takes place between the time any person boards the aircraft with the intention of flight until all such persons have disembarked, where a person is fatally or seriously injured, the aircraft sustains damage or structural failure or the aircraft is missing or is completely inaccessible.
Avicenna or Ibn-Sīnā (Arabic: ابن سینا; c. 980 – June 1037) was a Persian polymath who is regarded as one of the most significant thinkers and writers of the Islamic Golden Age.
Avianca S.A. (acronym in Spanish for "Aerovías del Continente Americano S.A.", Airways of the American Continent) has been the national airline and flag carrier of Colombia since 5 December 1919, when it was initially registered under the name SCADTA.
Avian influenza — known informally as avian flu or bird flu — refers to "influenza caused by viruses adapted to birds." The type with the greatest risk is highly pathogenic avian influenza (HPAI).
World War I was the first major conflict involving the large-use of aircraft. Tethered observation balloons had already been employed in several wars, and would be used extensively for artillery spotting.
Avicennia marina, commonly known as grey mangrove or white mangrove, is a species of mangrove tree classified in the plant family Acanthaceae (formerly in the Verbenaceae or Avicenniaceae).
The Aviators Model Code of Conduct is a set of model recommended practices designed to improve general aviation safety and airmanship.
Tim Bergling (Swedish pronunciation: [tɪm ˈbærjˈlɪŋ]; born 8 September 1989), better known by his stage name Avicii (/əˈviːtʃi/, ə-VEE-chee; Swedish pronunciation: [aˈvɪtɕɪ]; stylized as ), is a Swedish musician, DJ, remixer and record producer.
Aviation safety is a term encompassing the theory, investigation, and categorization of flight failures, and the prevention of such failures through regulation, education, and training.