Definition of knock out phrasal verb from the Oxford Advanced American Dictionary

 

knock out

 phrasal verb
phrasal verb
 
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Phrasal Verbs

    knock somebodyout

     
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  1. 1to make someone fall asleep or become unconscious The blow knocked her out.
  2. 2(in boxing) to hit an opponent so that they cannot get up within a limited time and therefore lose the fight related noun knockout
  3. 3(informal) to surprise and impress someone very much The movie just knocked me out. related noun knockout

knock somebodyout (of something)

 
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to defeat someone so that they cannot continue competing synonym eliminate The White Sox had been knocked out of the World Series. see also knockout

knock somethingout

(informal)
 
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to produce something, especially quickly and easily He knocks out five books a year.