knock out Rate this phrase:(0.00 / 0 votes)
To render someone unconscious, as by a blow to the head.

The boxer knocked out his opponent in the third round.

Additional definitions for 'knock out':

knock outTo strike or bump someone or something out.
knock outTo put someone to sleep.
knock outTo exhaust a personal or animal.
knock outTo complete, especially in haste; knock off.
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"knock out." STANDS4 LLC, 2018. Web. 23 Sep. 2018. <>.

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