Dictionary.com
definitions
  • synonyms

kayo

[key-oh, key-oh; verb key-oh]Slang.
See more synonyms for kayo on Thesaurus.com
noun, plural kay·os, verb, kay·oed, kay·o·ing.
  1. KO.
Show More

Origin of kayo

An Americanism dating back to 1920–25

KO

or K.O., k.o., kay·o

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

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
British Dictionary definitions for kayos

kayo

KO

slang
noun plural kayos
  1. boxing another term for knockout
Show More
verb kayoes, kayos, kayoing or kayoed
  1. boxing another term for knock outSee knockout (verb)
Show More

Word Origin

C20: from the initial letters of knock out

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
Show More
noun plural KO's or k.o.'s
  1. a slang term for knockout
Show More
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

Word Origin and History for kayos

kayo

spelled-out form of K.O. (knockout), from 1923. Also used in 1920s as a slang reversal of OK.

Show More
Online Etymology Dictionary, © 2010 Douglas Harper