A knockout, in several sports, is a strike that renders an opponent unable to continue fighting.

Look up knockout, cold cock, coldcock, or knock out in Wiktionary, the free dictionary.

Knockout may also refer to:

• Knock Out (Gottlieb pinball), a 1950 pinball machine
• Knock Out (kickboxing), a Japanese kickboxing promotion
• Knock Out (tabletop game), a tabletop game by the Milton Bradley Company
• Knockout (game), a basketball-related activity
• Knockout Cup (speedway), a British motorcycle speedway competition
• Knockout system, a tournament format divided into successive rounds
• Knockout tournament, a single-elimination tournament
• New England Knockouts, an American professional baseball team in Massachusetts
• Technical knockout (TKO), a knockout called by an official for safety reasons
• "TNA Knockout", a term used by Total Nonstop Action Wrestling to refer to its female talent

• Knockout (UK comics), either of two British comic books
• Knockout (DC Comics), a comic book character
• Knock Out (Transformers: Prime), a fictional robot supervillain turned superhero
• Knockout, a Femme Fatales comics character

• Knock-Out (novel), a Bulldog Drummond novel
• Knockout: Interviews with Doctors Who Are Curing Cancer – And How to Prevent Getting It in the First Place, a book by Suzanne Somers

• Knockout Entertainment, an American record label
• Knock Out (Bonfire album) (1991), album by the hard rock band Bonfire
• "Knockout" (Triple 8 song) (2003), a song by the British pop/rock group Triple 8
  • "Twins (Knock Out)", a cover version by Super Junior
• "Knockout" (Lil Wayne song) (2010), song by Lil Wayne from his album Rebirth
• "K.O." (Pabllo Vittar song) (2017), song by Pabllo Vittar from her album Vai Passar Mal
• TKO (The Knock Out), 2018 album by Mya
• Knock Out!, a 1981 album by Toots and the Maytals
• "Knockout" (Bon Jovi song), song from 2016 album This House Is Not for Sale
• "Knock Out" (GD & TOP song), 2011 song by GD & TOP for their self-entitled album
• "Knockout" (2019), a song by Martin Tungevaag

• The Knockout, a 1914 Keystone Studios film with Fatty Arbuckle and Charlie Chaplin.
• The Knockout (1923 film), a 1923 British silent sports film directed by Alexander Butler
• The Knockout (1925 film), a silent drama directed by Lambert Hillyer
• Knockout (1935 film), a German sports film
• Knockout (1941 film), a 1941 American drama directed by William Clemens
• Knock Out (1943 film), a 1943 Italian crime film directed by Carmine Gallone
• Knockout (2000 film), an American film about a female boxer
• Knock Out (2010 film), an Indian Hindi-language action-thriller film
• Knockout (2011 film) or Born to Fight, a Canadian film
• Haywire (2011 film) or Knockout, a 2011 American film
• Knockout (game show), a 1977–78 NBC series hosted by Arte Johnson
• Knockout (Indonesian TV series), a game show
• The Knockout (Chinese TV series), a 2023 Chinese TV series directed by Xu Jizhou

• Knockout (web framework), a JavaScript library
• Image knockout, removing the background from an image

• Knock-outs, partially punched enclosure openings for optional removal
• Knockout punch, a metalworking tool
• Knock-out pot, a vapor–liquid separator

• Knockouts (salon), an American salon chain
• Knockout CP Freshmart (born 1990), Thai boxer and former Muay Thai fighter
• Knock-out option, a barrier option in financial markets
• Knockout game, a criminally violent activity
• Gene knockout, molecular biology technique
• Operation Knockout, a military campaign
• Reversing type, also known as knocking out, a method of typographic printing

• Incapacitation (disambiguation)
  • Knockout gas
  • Knockout drops
• Knocking one out, a euphemism
• KO (disambiguation)
• Knock Yourself Out (disambiguation)
• Double knockout (disambiguation)
• Knockout game (disambiguation)
• All pages with titles containing Knockout
• All pages with titles containing Knock out

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