Dictionary
knockout
noun knock·out \ˈnäk-ˌau̇t\
Definition of KNOCKOUT
1
a : 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 (2) : technical knockout c : a blow that knocks out an opponent
2
: a sensationally striking, appealing, or attractive person or thing
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First Known Use of KNOCKOUT
1887
knockout
adjective
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>
See knockout defined for English-language learners
First Known Use of KNOCKOUT
1818
Related to KNOCKOUT
- Synonyms
- aesthetic (also esthetic or aesthetical or esthetical), attractive, beauteous, bonny (also bonnie) [chiefly British], comely, cute, drop-dead, fair, fetching, good, good-looking, goodly, gorgeous, handsome, beautiful, likely, lovely, lovesome, pretty, ravishing, seemly, sightly, stunning, taking, well-favored
- Antonyms
- grotesque, hideous, homely, ill-favored, plain, ugly, unaesthetic, unattractive, unbeautiful, uncomely, uncute, unhandsome, unlovely, unpleasing, unpretty, unsightly
Medical Dictionary
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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