/ˈnɒkaʊt ||; ˈnɑkˌaυt/noun[C] 1 a hard hit that causes sb to become unconscious or to be unable to get up again for a while 把某人击晕或击倒的一击
2 (especially Brit 尤为英) a competition in which the winner of each game goes on to the next part but the person who loses plays no more games 淘汰赛