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.
/ˈnɒkˌaʊt/
noun
1.
the act of rendering unconscious
2.
a blow that renders an opponent unconscious
3.

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
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.

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+)