knockout

[ nok-out ]
/ ˈnɒkˌaʊt /

noun

adjective

that knocks out: the knockout punch.

Origin of knockout

1810–20; 1935–40 for def 4; noun, adj. use of verb phrase knock out
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for knockout

British Dictionary definitions for knockout

knockout

/ (ˈnɒkˌaʊt) /

noun

verb knock out (tr, adverb)

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 knockout

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