Knock-out meaning

To strike or bump (someone or something) out.

I accidentally knocked out the glass in my picture frame.

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(idiomatic) To put to sleep.

The allergy pill knocked him out for a good three hours.

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(idiomatic) To exhaust.

Running errands all day really knocked him out.

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(idiomatic) To complete, especially in haste; knock off.

They knocked out the entire project in one night.

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(idiomatic) To cause a mechanism to become non-functional by damaging or destroying it.

The antitank gun knocked out the enemy tank.

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(sports) To eliminate.
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Alternative form of knockout.
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(idiomatic) To render unconscious, as by a blow to the head.

The boxer knocked out his opponent in the third round.

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