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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.
- a knockout in boxing.
verb (used with object)
, KO'd, KO'ing.
- to knock unconscious, especially in a boxing match; knock out.
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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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Example Sentences
And some experts hesitate to label the concussion crisis as the one that will finally K.O. football as we know it.
From The Daily Beast
But when she tried to leave him for a woman, he hatched a plot to K.O. her for good.
From The Daily Beast
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