religion Contracting Officer, US government acronym KO or CO K.O., protagonist in OK K.O.! Let's Be Heroes Ko Ukumori, a character in the air combat game The Sky Crawlers: Innocent Aces Dukkha, the concept of unsatisfactoriness in Buddhism Kick-off (association football), the time or manner of start of play Kō, Japanese for incense; see Japanese incense Kōdō, the art of appreciating Japanese incense See also TKO (disambiguation) Kayo (disambiguation) Knockout (disambiguation) K0 (disambiguation) Kou (disambiguation) Gong (disambiguation), called Ko in Japanese