On, on, or ON may refer to:

Arts and entertainment

Music

* On (band), a solo project of Ken Andrews * ''On'' (EP), a 1993 EP by Aphex Twin * ''On'' (Echobelly album), 1995 * ''On'' (Gary Glitter album), 2001 * ''On'' (Imperial Teen album), 2002 * ''On'' (Elisa album), 2006 * ''On'' (Jean album), 2006 * ''On'' (Boom Boom Satellites album), 2006 * ''On'' (Tau album), 2017 * "On" (song), a 2020 song by BTS * "On", a song by Bloc Party from the 2006 album '' A Weekend in the City''

Other media

* ''

Ön ''Ön'' ( en, The Island) is a 1966 Swedish drama film directed by Alf Sjöberg. At the 3rd Guldbagge Awards Sjöberg won the award for Best Director. The film was also entered into the 1966 Cannes Film Festival. Cast * Per Myrberg as Count Mag ...

'', a 1966 Swedish film *

On (Japanese prosody) ''On'' (音; rarely ''onji'') are the phonetic units in Japanese language, Japanese poetry. In the Japanese language, the word means "sound". It includes the phonetic units counted in haiku, tanka, and waka (poetry), other such poetic forms. Known ...

, the counting of sound units in Japanese poetry * ''On'' (novel), by Adam Roberts * ONdigital, a failed British digital television service, later called ITV Digital *

Overmyer Network The Overmyer Network, later the United Network, was a television network. It was intended to be a fourth television network, fourth national commercial network in the United States, competing with the Big Three television networks. The network ...

, a former US television network

Places

* On (Ancient Egypt), a Hebrew form of the ancient Egyptian name of Heliopolis * On, Wallonia, a district of the municipality of Marche-en-Famenne * Ahn, Luxembourg, known in Luxembourgish as ''On'' * Ontario, a Canadian province

Science, technology, and mathematics

Biology and medicine

* Operative note, documentation of care relating to an operation * Optic neuritis, especially relevant in multiple sclerosis * Osteonecrosis, death of bone tissue * Osteonectin, a glycoprotein

Other uses in science, technology, and mathematics

* ON Semiconductor, a semiconductor manufacturing company * O'Nan group, a mathematical group * OS/Net, the

OpenSolaris OpenSolaris () is a discontinued open-source computer operating system based on Solaris and created by Sun Microsystems. It was also, perhaps confusingly, the name of a project initiated by Sun to build a developer and user community around th ...

Community * On, the

proper class Proper may refer to: Mathematics * Proper map, in topology, a property of continuous function between topological spaces, if inverse images of compact subsets are compact * Proper morphism, in algebraic geometry, an analogue of a proper map for ...

of all ordinal numbers

Other uses

* On (biblical figure), son of Peleth * On (company), a Swiss athletic shoe and sportswear company * On Kawara, Japanese artist * Nauru Airlines (IATA airline designator ON) * Leg side, in the game of cricket * Old Norse, a North Germanic language commonly referenced in etymology * Ontology, a branch of philosophy that deals with the concept of being * On'yomi, reading of Japanese kanji characters * Order of the Nation, a Jamaican honour * Overground Network, a railway scheme in South London * ON convoys, a series of WWII trade convoys * Orka náttúrunnar (ON Power), Icelandic geothermal power company