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.
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
Related Words for koinghit, beat, tap, punch, slap, hurt, smack, fell, batter, flatten, damage, whack, bash, annihilate, expunge, exterminate, ravage, erase, eliminate, smash
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 Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012