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View synonyms for KO

KO

or K.O., k.o., kay·o

[ noun key-oh, key-oh; verb key-oh ]

noun

, plural KO's.
  1. a knockout in boxing.

verb (used with object)

, KO'd, KO'ing.
  1. to knock unconscious, especially in a boxing match; knock out.

KO

/ ˈkeɪˈəʊ /

verb

  1. a slang term for knock out See knockout

noun

  1. a slang term for knockout

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Word History and Origins

Origin of KO1

First recorded in 1920–25; initial letters of knock out

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