knockout Meaning, definition in Cambridge English Dictionary
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Meaning of "knockout" - English Dictionary

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knockoutnoun [C]

uk   /ˈnɒk.aʊt/  us   /ˈnɑːk-/

knockout noun [C] (UNCONSCIOUS)

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
See also

knockout noun [C] (COMPETITION)

(US elimination tournament) 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. a knockout competition/championship

knockout noun [C] (ATTRACTIVE)

informal a person or thing that looks, sounds, etc. extremely attractive: Your sister's a real knockout!

knockoutadjective

uk   /ˈnɒk.aʊt/  us   /ˈnɑːk-/ informal
extremely attractive: She looked knockout in that dress.
(Definition of knockout from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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