An, AN, aN, or an may refer to:

Businesses and organizations

Airlinair Société Airlinair, simply known as Airlinair, was a French regional airline based in Rungis, France, operating scheduled regional flights (some of which were on behalf of Air France), and aircraft lease services. The airline has set up bases ...

(IATA airline code AN) * Alleanza Nazionale, a former political party in Italy * AnimeNEXT, an annual anime convention located in New Jersey * Anime North, a Canadian anime convention * Ansett Australia, a major Australian airline group that is now defunct (IATA designator AN) * Apalachicola Northern Railroad (reporting mark AN) 1903–2002 ** AN Railway, a successor company, 2002– * Aryan Nations, a white supremacist religious organization * Australian National Railways Commission, an Australian rail operator from 1975 until 1987 * Antonov, a Ukrainian (formerly Soviet) aircraft manufacturing and services company, as a model prefix

Entertainment and media

* Antv, an Indonesian television network * ''Astronomische Nachrichten'', or ''Astronomical Notes'', an international astronomy journal * ''Avisa Nordland'', a Norwegian newspaper * ''Sweet Bean'' (あん), a 2015 Japanese film also known as ''An''

Language

* An, English indefinite article * Anglo-Norman language * Aragonese language (ISO 639-1:2002 language code AN) * Dutch language#Official status, Algemeen Nederlands (meaning "Common Dutch"), the official Dutch language * A variant of the prefix "in", used before vowels to convey the meaning "not" (for example: aneuploid means "not euploid")

Mathematics, science, and technology

* ''A_n'', in mathematics, a root system and its Dynkin diagram * ''A_n'', in mathematics, conventional notation for the alternating group * ''a_n'', a generic label for a term of a sequence * AN thread, Army and Navy thread - for bolts and tube fittings in 16th inch increments * Acanthosis nigricans, a skin condition * Acrylonitrile, an organic compound and monomer used in the manufacture of certain plastics * Actinide (An), informal symbol for a series of chemical elements * Ammonium nitrate (AN), a chemical compound * Anode, in electronic schematics * Anorexia nervosa, an eating disorder * Application note (in engineering), most often seen as A.N. * Newton (unit), Attonewton (aN), an SI unit of force * Anorthite, a feldspar mineral

Military

* A prefix used by the U.S. military for electronic equipment named under the Joint Electronics Type Designation System * Net laying ship (US Navy hull classification symbol AN) * ''Avtomat Nikonova'' used for the AN-94

Names

* Ahn (Korean name) (安) * An (surname) (安), Chinese surname

Places

* An County, in Sichuan, China * Agios Nikolaos (disambiguation), a common place name in Greece and Cyprus * Province of Ancona, a province of Italy (ISO 3166-2:IT code AN) * Andaman and Nicobar Islands, a territory in southeastern India (ISO 3166 code AN) * Anderson County, Kansas (state county code AN) * Andorra (obsolete NATO country code AN) * Angola (World Meteorological Organization country code AN) * Netherlands Antilles (ISO country code AN)

Religion

* An (Shintō), a small table or platform used during Shinto ceremonies * Anu or An, a god in Sumerian and Babylonian mythology

Other uses

* Associate degree in nursing * Algebraic notation (chess) (AN), the standard system for recording moves in chess