K.O.'ED

KO

[n. key-oh, key-oh; v. key-oh] noun, plural KO's, verb, KO'd, KO'ing. Slang.
noun
1.
a knockout in boxing.
verb (used with object)
2.
to knock unconscious, especially in a boxing match; knock out.
Also, K.O., k.o., kayo.

Origin:
1920–25; initial letters of knock out

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2013.
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Collins
World English Dictionary
kayo or slang KO (ˈkeɪˈəʊ) [Click for IPA pronunciation guide]
 
—n , pl kayos
1.  boxing another term for knockout
 
—vb , kayos, kayoes, kayos, kayoing, kayoed
2.  boxing See knockout another term for knock out
 
[C20: from the initial letters of knock out]
 
KO or slang KO
 
—n
 
—vb
 
[C20: from the initial letters of knock out]

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a screen or mat covered with a dark material for shielding a camera lens from excess light or glare.
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KO or k.o. (ˈkeɪˈəʊ) [Click for IPA pronunciation guide]
 
—vb , KO's, KO'ing, KO'd, k.o.'s, k.o.'ing, k.o.'d
1.  See knockout a slang term for knock out
 
—n , KO's, KO'ing, KO'd, k.o.'s, k.o.'ing, k.o.'d, KO's, k.o.'s
2.  a slang term for knockout
 
k.o. or k.o.
 
—vb
 
—n

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Slang Dictionary

KO definition

[ˈkeˈo]
and kayo
  1. n.
    a knockout. (The abbreviation is an initialism. Boxing.) : It was a quick KO, and Wilbur was the new champ.
  2. tv.
    to knock someone out. (See also KOed. Boxing.) : Wilbur planned to KO Wallace in the third round.
Dictionary of American Slang and Colloquial Expressions by Richard A. Spears.Fourth Edition.
Copyright 2007. Published by McGraw Hill.
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American Heritage
Abbreviations & Acronyms
ko
Korean
KO

  1. Coca-Cola Co.

  2. knockout

The American Heritage® Abbreviations Dictionary, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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