knockout
noun [ C ] uk/ˈnɒk.aʊt/ us/ˈnɑːk.aʊt/
(UNCONSCIOUS)
（拳击中的）击败对手的一击，击倒对手获胜
in boxing, the act of hitting the other fighter so that they fall to the ground and are unable to get up again within ten seconds
a knockout punch/blow 使人倒地不起的一击
See also: knock someone out (MAKE UNCONSCIOUS)
(COMPETITION)
(US elimination tournament)淘汰赛
a competition in which only the winners of each stage play in the next stage, until one competitor or team is the final winner
The tournament is a straight knockout. 这次锦标赛是直接淘汰赛。
a knockout competition/championship 淘汰赛／锦标赛
(ATTRACTIVE)
informal极有吸引力的人（或物）
a person or thing that looks, sounds, etc. extremely attractive
Your sister's a real knockout! 你的妹妹真是令人着迷！
Idiom
a knockout blowidiom 毁灭性的打击
an event or action that causes someone or something to fail
Already out of training, the latest illness has dealt her hopes of a gold medal a knockout blow. 她本就缺乏训练，最近患病更给她夺金的希望以致命的打击。
knockout
adjective informal uk/ˈnɒk.aʊt/ us/ˈnɑːk.aʊt/
极有吸引力的
extremely attractive
She looked knockout in that dress. 她穿着那条裙子很迷人。