An is the indefinite article in English; see a and an. An, AN, aN, or an may also refer to: Culture and language · An · An alternative romanisation for Ahn · An , a god in Sumerian mythology · An , 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 , a small table or platform used during Shinto ceremonies Mathematics and science · aN, the attonewton, an SI unit of force · An, a Dynkin diagram · AN, ammonium nitrate · Anorexia Nervosa, an eating