A KO is a knockout in various sports, such as boxing and martial arts. K.O., Ko or Kō may also refer to: Arts and entertainment Music KO (musician), Canadian musician who plays a fusion of hip hop and folk music K.O. (album), a 2021 album by Danna Paola K.O (rapper), South African rapper Ntokozo Mdluli Karen O (born 1978), lead singer of the rock group Yeah Yeah Yeahs Kevin Olusola, American cellist, beatboxer and member of a cappella group Pentatonix K.O., a 2008 album by Rize "K.O.", a 2004 song by Smujji Other media Ko (Go), in the board game Go Ko (film), a 2011 Tamil action movie Knight Online, a 2004 online role-playing game Language Ko language Ko (kana), the romanization of the Japanese kana こ and コ ISO 639-1 code for the Korean language Surname Ko (Korean surname) Gao (surname), a surname of Chinese origin romanized to Ko in Hong Kong, and in several romanizations especially in South-east Asia Ke (surname), a Chinese surname romanized as "Ko" in the Wade–Giles system Xu (surname), a surname of Chinese Xu and customarily spelled as Ko Cody Ko, shortened stage name of Canadian comedian and internet celebrity Cody Michael Kolodziejzyk (born 1990) People K.O (rapper) South African musician and businessman KO (musician), Canadian musician who plays a fusion of hip hop and folk music Ko Simpson (born 1983), professional American football player for the Buffalo Bills Kevin Owens, professional wrestler Places Ko Mountain, the second-highest peak in the Sikhote-Alin Mountains of Russia Ko. Madhepura, Nepal, a village development committee Ko, Lamphun, Thailand, a village and subdistrict Kö, an urban boulevard in Düsseldorf, Germany Science and technology Ko, an ancient Chinese weapon also known as a dagger-axe in English Kō, a version of the foot plough used by the Māori people Gene knockout, a molecular biology genetic technique, abbreviated KO Knowledge organization, branch of information science Knowledge Organization, an academic journal published by the International Society for Knowledge Organization kilooctet (computing), a unit of information or computer storage Loadable kernel module (file extension .ko) Transportation Kō Station (Aichi) on the Meitetsu Nagoya Main Line in Japan Kō Station (Tokushima) on the Tokushima Line in Japan Alaska Central Express, IATA airline designator Other uses The Coca-Cola Company, stock ticker symbol and corporate internet domain ko.com Civic Coalition (Poland), or Koalicja Obywatelska (KO), a Polish electoral alliance Knock-off, a counterfeit product Kemetic Orthodoxy, a