Avi or AVI may refer to:
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.
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.
Avianca S.A. (acronym in Spanish for "Aerovías del Continente Americano S.A."), Airways of the American Continent, is a Colombian airline which 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).
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 ΛVICII and ◢◤), is a Swedish musician, DJ, remixer and record producer.
Avignon (French pronunciation: [a.vi.ɲɔ̃]; Latin: Avenio; Occitan: Avignoun, Occitan: Avinhon pronounced [aviˈɲun]) is a commune in south-eastern France in the department of Vaucluse on the left bank of the Rhône river.
Aviation is the practical aspect or art of aeronautics, being the design, development, production, operation and use of aircraft, especially heavier than air aircraft.