AN

An is the indefinite article in English; see a and an.

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

Culture and language

* An (Chinese name)
* An alternative romanisation for Ahn (Korean name)
* An (mythology), a god in Sumerian mythology
* An (goddess), a goddess in Sumerian mythology
* AN "Algemeen Nederlands" (meaning "Common Dutch"), the official Dutch language, common to most people in the Netherlands and the Flemish community in Belgium
* Aragonese language's ISO 639-1:2002 language code
* Anguttara Nikaya, one of the five oldest books in Buddhist literature
* An (Shintō), a small table or platform used during Shinto ceremonies

Mathematics and science

* aN, the attonewton, an SI unit of force
* A_n, a Dynkin diagram
* AN, ammonium nitrate
* Anorexia Nervosa, an eating disorder
* acrylonitrile

Organizations

* "Alleanza Nazionale", the Italian name for the National Alliance (Italy), a political party in Italy
* Anime North, a Canadian anime convention
* Ansett Australia's now defunct IATA airline designator
* Apalachicola Northern Railroad's Association of American Railroads reporting mark
* "Avisa Nordland", a Norwegian newspaper
* The design office prefix for Antonov, a Ukrainian (formerly Soviet) aircraft manufacturing and services company
* "Astronomische Nachrichten", or "Astronomical Notes", an international Astronomy journal
* Aryan Nations, a white supremacist religious organization
* Australian National Railways - the formerly federal government owned Trans-Australia Railway, Central-Australia Railway, Country South Australia and Tasmanian Railways operator.

Placename abbreviations or codes

* Anderson County, Kansas state county code
* Andorra's obsolete NATO country code
* Angola's World Meteorological Organization country code
* Application Note Application Note (in engineering) most often seen as A.N.
* Netherlands Antilles' ISO country code

Other

* AN thread, a type of fitting
* a prefix used by the U.S. military for electronic equipment named under the Joint Electronics Type Designation System
* the romanization of the Japanese word 餡, meaning red bean paste
* An County, in Sichuan, China