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KO

or K.O., k.o., kay·o

[noun key-oh, key-oh; verb key-oh]Slang.
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noun, plural KO's.
  1. a knockout in boxing.
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verb (used with object), KO'd, KO'ing.
  1. to knock unconscious, especially in a boxing match; knock out.
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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. 2018

Related Words

hit, beat, tap, punch, slap, hurt, smack, fell, batter, flatten, damage, whack, bash, annihilate, expunge, exterminate, ravage, erase, eliminate, smash
British Dictionary definitions for ko'd

KO

k.o.

verb KO's, KO'ing, KO'd, k.o.'s, k.o.'ing or k.o.'d
  1. a slang term for knock outSee knockout
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noun plural KO's or k.o.'s
  1. a slang term for knockout
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Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012