KO
or K.O., k.o., kay·o
[noun key-oh, key-oh; verb key-oh]Slang.
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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RELATED WORDS
hit, beat, tap, punch, slap, hurt, smack, fell, batter, flatten, damage, whack, bash, annihilate, expunge, exterminate, ravage, erase, eliminate, smash
Origin of KO
First recorded in 1920–25; initial letters of knock out
Dictionary.com Unabridged
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
KO
k.o.
verb KO's, KO'ing, KO'd, k.o.'s, k.o.'ing or k.o.'d
noun plural KO's or k.o.'s
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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