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

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KOverb [T]

uk   /ˌkeɪˈəʊ/  us   /-ˈoʊ/ (present participle KO'ing, past tense and past participle KO'd) informal
to make someone unconscious, especially in boxing to make someone feel very weak, tired, and ill: That flu really KO'd me for a while.
KO
noun [C] uk   us   (KOs)
(Definition of KO from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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