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Definition of knockout
1a : the act of knocking out : the condition of being knocked outb (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 (2) : technical knockoutc : a blow that knocks out an opponent
2 : a sensationally striking, appealing, or attractive person or thing
From the M-W Editors
Recent Examples of knockout from the Web
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The knockout round begins Wednesday at the FIBA Under 19 world championships in Egypt, with John Calipari's group of elite prospects and young college stars set to take on Mali in the Round of 16 after a 3-for-3 run through the prelims.
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Teams in the Gold Cup can make up to six roster changes between the end of the group stage and the start of the knockout rounds.
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Pacquiao entered the fight with a 59-6-2 record, but the most recent of his 38 wins by knockout was in 2009.
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Beckham’s midnight blue and black combo was a total knockout from top to bottom.
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Regarding potential knockout-stage replacements—Michael Bradley, Jozy Altidore, Clint Dempsey and Darlington Nagbe are among those eligible and waiting in the wings—Arena said.
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The Crimson Tide grabbed the momentum with a surprise onside kick, then dealt the knockout blow on Kenyan Drake's kickoff return for a touchdown. 1.
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And the current administration has the capacity to deliver the knockout punch to America’s once-thriving middle class.
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Total Republican voting edged total Democratic voting slightly; that and the fact that Ossoff’s strategy was to win a first-round knockout made Handel the slight favorite heading toward June 20.
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.
First Known Use of knockout
1887
knockout
Definition of knockout
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
First Known Use of knockout
1818
Medical Dictionary
knockout
playMedical 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
Learn More about knockout
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Thesaurus: All synonyms and antonyms for knockout Spanish Central: Translation of knockout Nglish: Translation of knockout for Spanish speakers Britannica English: Translation of knockout for Arabic speakers Britannica.com: Encyclopedia article about knockout
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