Definitions
knock out Tweet Definition of knock out Like Definition of knock out on Facebook
verb (infl, en, verb, head=to knock out)
  1. To strike or bump someone or something out.
I accidentally knocked out the glass in my picture frame.
  1. To render someone unconscious, as by a blow to the head.
The boxer knocked out his opponent in the third round.
  1. To put someone to sleep.
The allergy pill knocked him out for a good three hours.
  1. To exhaust a personal or animal.
Running errands all day really knocked him out.
  1. To complete, especially in haste; knock off.
They knocked out the entire project in one night.
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