knock out
Idioms-
Also, knock out cold . Render unconscious by a blow or some other means. For example, It was just a swinging door, but it knocked her out , or Just one of those sleeping pills can knock you out cold . [Late 1500s]
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Make tired, exhaust, as in That sightseeing tour knocked me out .
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Render useless or inoperative, as in The storm knocked out the power .
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See knock off , def. 2.
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See knock oneself out .
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
"The evidence -- that you can knock out PRX3 in mice and there's no adverse phenotype -- supports our approach."
From Science Daily ● Sep. 17, 2026
Like he could dust off one of the old bandannas and knock out a best-of-five.
From The Wall Street Journal ● Aug. 25, 2026
When these materials slam into Earth's magnetic shield, they can knock out satellites, threaten astronauts -- and create colourful auroras in the skies of northern and southern latitudes.
From Barron's ● Aug. 5, 2026
In 1993 it was home to the largest crowd in championship boxing history, when 132,274 people watched national hero Julio Cesar Chavez knock out Greg Hauger to retain the WBC super lightweight title.
From BBC ● Jul. 5, 2026
It does distract me from my other distractions for a bit, and I’m able to knock out my homework and shower without getting sidetracked.
From "Fast Pitch" by Nic Stone
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
