KO
noun/ˌkeɪ ˈəʊ/
/ˌkeɪ ˈəʊ/
(also kayo)
[countable, uncountable]- (in boxing) a hard hit that makes an opponent fall to the ground and be unable to get up, so that they lose the fight (the abbreviation for knockout)
重击使对手倒地不起，以致输掉比赛（击倒的缩写） - He regained the world heavyweight crown with a fifth-round KO of his American opponent.
他第五回合KO美国对手，重夺世界重量级冠军。 - The Russian has won most of his bouts by KO.
俄罗斯人大部分比赛都是通过KO获胜。
Word Origin1920s: abbreviation. - He regained the world heavyweight crown with a fifth-round KO of his American opponent.