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knockout

[nok-out] /ˈnɒkˌaʊt/
noun
1.
an act or instance of knocking out.
2.
the state or fact of being knocked out.
3.
a knockout blow.
4.
Informal. a person or thing overwhelmingly attractive, appealing, or successful.
5.
a panel in a casing, can, or box, especially of metal or plastic, so designed that it can readily be removed, as by punching, hammering, or cutting, to provide an opening into the interior:
a knockout in a junction box.
6.
Machinery. a device for knocking something loose, as finished work from a lathe chuck.
adjective
7.
that knocks out:
the knockout punch.
Origin of knockout
1810-1820
1810-20; 1935-40 for def 4; noun, adj. use of verb phrase knock out
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the Web for knockout
Contemporary Examples
Historical Examples
  • For the first time in five-and-twenty years of fighting, clean and dirty, Fergus McLaughlin had taken a knockout.

    Cursed George Allan England
  • There's a knockout comin' to the best of 'em, if they hang to the game long enough.

    Shorty McCabe Sewell Ford
  • Farley's opinion was that Dave was done for, unless he could land some lucky fluke in a knockout blow.

  • It was the seventeen-course night dinners and the foreign cooking that gave him the knockout.

    Shorty McCabe Sewell Ford
  • And he found that he had an awful hangover from the knockout drug, and the slapping around he had received.

    The Planet Strappers Raymond Zinke Gallun
British Dictionary definitions for knockout

knockout

/ˈnɒkˌaʊt/
noun
1.
the act of rendering unconscious
2.
a blow that renders an opponent unconscious
3.
  1. a competition in which competitors are eliminated progressively
  2. (as modifier): a knockout contest
4.
a series of absurd invented games, esp obstacle races, involving physical effort or skill
5.
(informal) a person or thing that is overwhelmingly impressive or attractive: she's a knockout
verb (transitive, adverb)
6.
to render unconscious, esp by a blow
7.
(boxing) to defeat (an opponent) by a knockout
8.
to destroy, damage, or injure badly
9.
to eliminate, esp in a knockout competition
10.
(informal) to overwhelm or amaze, esp with admiration or favourable reaction: I was knocked out by that new song
11.
to remove the ashes from (one's pipe) by tapping
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
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Word Origin and History for knockout
n.

also knock-out, in fighting, 1887, from verbal phrase knock out "to stun by a blow for a 10-count" in boxing, short for to knock out of time; see knock (v.) + out. Slang meaning "attractive person" is from 1892. To knock oneself out "make a great effort" is from 1936.

Online Etymology Dictionary, © 2010 Douglas Harper
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Slang definitions & phrases for knockout

knockout

modifier

: That was a knockout plot/ a knockout wife and two daughters

noun

An especially attractive person or thing; dish: Saaay, you know, you're a knockout (1906+)

The Dictionary of American Slang, Fourth Edition by Barbara Ann Kipfer, PhD. and Robert L. Chapman, Ph.D.
Copyright (C) 2007 by HarperCollins Publishers.
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18
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