knock out

Idioms  

1. 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]

2. Make tired, exhaust, as in That sightseeing tour knocked me out .

3. Render useless or inoperative, as in The storm knocked out the power .

4. See knock off , def. 2.

5. See knock oneself out .

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Example Sentences

That storm knocked out power for several days, but led to the opening of all the trails on June Mountain, the town’s ski resort.

From Los Angeles Times

The storm, which caused chaos from Texas to the tip of Maine over the weekend, snarled roadways, knocked out power, and buried major cities under a thick blanket of snow.

From BBC

Millions of Americans were facing dangerously cold temperatures Monday in the wake of a massive winter storm that whipped snow and ice across the country, knocking out power and paralyzing transportation.

From Barron's

Around 10% of U.S. natural gas production was temporarily knocked out of commission just as demand was spiking, noted strategists at Saxo Bank.

From MarketWatch

This time, Tien needed only three sets to knock out the former U.S.

From The Wall Street Journal