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knock out
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]
Make tired, exhaust, as in That sightseeing tour knocked me out .
Render useless or inoperative, as in The storm knocked out the power .
See knock off , def. 2.
See knock oneself out .
Example Sentences
This is important because intense solar activity can affect satellite communication and knock out power grids on Earth.
The 43-year-old has bounced back after a fall in the Irish Derby two years ago where he was knocked out and left with fractures to his legs and elbow,
Fielding has been one of England's biggest areas for improvement, with six drops seeing them prematurely knocked out in T20 World Cup group stage and seven on day one of the Ashes Test alone.
It was not until he knocked out three of four opponents in the unlicensed white-collar boxing scene - where novices compete often for charity or personal challenge - that he decided to turn professional.
The Lionesses were beaten 2-1 by world champions Spain on Tuesday to be knocked out of the Nations League.
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