knock out

verb

Definition of knock out

  1. transitive verb
  2. 1 :  to produce roughly or hastily

  3. 2 a (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>

  4. 3 :  to tire out :  exhaust <knocked themselves out with work>

  5. 4 :  to cause (an opposing pitcher) to be removed from a baseball game by a batting rally

Examples of knock out in a sentence

  1. <the entire staff knocked itself out getting the project finished on time>

1856

First Known Use of knock out

1856



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