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knockout

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1knockout/ˈnɑːkˌaʊt/noun
pluralknockouts
1knockout
/ˈnɑːkˌaʊt/
noun
pluralknockouts
Learner's definition of KNOCKOUT  
[count]
: an occurrence in which a boxing match ends when a fighter has been knocked down by a punch and is unable to start fighting again before 10 seconds have passed
— see also technical knockout
informal  : a very attractive or appealing person or thing
— see also knock out at 1knock
2knockout/ˈnɑːkˌaʊt/adjective
2knockout
/ˈnɑːkˌaʊt/
adjective
Learner's definition of KNOCKOUT  
always used before a noun
: causing someone to become unconscious
informal  : extremely attractive or appealing
British, of a contest or competition  : designed so that winning teams or players continue to play and losing teams or players do not
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