knockout

noun
knock·​out | \ ˈnäk-ˌau̇t \

Definition of knockout 

(Entry 1 of 3)

1a : the act of knocking out : the condition of being knocked out
b(1) : the termination of a boxing match when one boxer has been knocked down and is unable to rise and resume boxing within a specified time
c : a blow that knocks out an opponent
2 : a sensationally striking, appealing, or attractive person or thing

knockout

adjective

Definition of knockout (Entry 2 of 3)

1 : causing a knockout a knockout blow
2 : sensationally striking, appealing, or attractive a knockout dress
3 : having all or part of a gene eliminated or inactivated by genetic engineering knockout mice predisposed to diabetes mellitus

knock out

verb

Definition of knock out (Entry 3 of 3)

transitive verb

1 : to produce roughly or hastily
2a(1) : to defeat (a boxing opponent) by a knockout
(2) : to make unconscious the drug knocked him out
b : to make inoperative or useless electricity was knocked out by the storm
c : to get rid of : eliminate knocked out illegal gambling
3 : to tire out : exhaust knocked themselves out with work
4 : to cause (an opposing pitcher) to be removed from a baseball game by a batting rally

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Examples of knockout in a Sentence

Noun

He won the match by a knockout. He scored a knockout in the fourth round. She's a real knockout in that dress.

Adjective

The Wimbledon tennis tournament is a knockout competition. a knockout sports car that's the talk of the neighborhood

Verb

the entire staff knocked itself out getting the project finished on time
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Recent Examples on the Web: Noun

In all three knockout games so far, Croatia fell behind but came through. Rob Harris, chicagotribune.com, "Three reasons why Croatia will win the World Cup final," 14 July 2018 The nadir for me came during the rugged knockout game between Colombia and England. Kanishk Tharoor, The Atlantic, "The Elusive Underdog Magic of the World Cup," 14 July 2018 Croatia has gone 120 minutes in each of its three knockout games. Ed Barkowitz, Philly.com, "Atlantic City bookies offer odds and props for Sunday's World Cup final between France and Croatia," 13 July 2018 Nobody expected England to go this far before the start of the tournament, with getting out of the group and winning just one knockout game the extent of even the most hopeful expectations. Jamie Spencer, Pro Soccer USA, "World Cup preview Croatia vs England: Head to Head, Team News, Prediction & More," 11 July 2018 In 1998, a defender — Laurent Blanc — scored in the first knockout game to defeat Paraguay in extra time; and Barthez saved France in a tense penalty shootout against Italy in the quarterfinals. Jerome Pugmire, The Seattle Times, "Superb defense takes France close to another World Cup title," 10 July 2018 Canada and Mexico will each only host ten of the 80 games and all the knockout games from the quarterfinals on will be in the United States. Ann Killion, SFChronicle.com, "2026 World Cup jointly hosted by U.S. will be weird, watered-down — and spectacular," 10 July 2018 Nearly a week went by before Uruguay’s next game in the knockout round. Candace Rose Rardon, Longreads, "The Country Where Fútbol Comes First," 10 July 2018 Four knockout games during the tournament have ended equal after 90 minutes, sending the match into the additional two 15-minute periods. Martin Rogers, USA TODAY, "Extra time is lame. Let's just skip straight to penalties at the World Cup," 8 July 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'knockout.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of knockout

Noun

1887, in the meaning defined at sense 1a

Adjective

1818, in the meaning defined at sense 1

Verb

1856, in the meaning defined at sense 1

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Statistics for knockout

Last Updated

22 Dec 2018

Look-up Popularity

Time Traveler for knockout

The first known use of knockout was in 1818

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More Definitions for knockout

knockout

adjective
knock·​out | \ ˈnäk-ˌau̇t \

Medical Definition of knockout 

: having all or part of a gene eliminated or inactivated by genetic engineering knockout mice predisposed to diabetes mellitus serve as animal models in the study of human diabetes

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Comments on knockout

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