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

In one town, the slurry knocked out a hydropower project, adding even more water to the deluge as it joined the Teesta, a Himalayan river known for its sinewy twists and turns.

From The Wall Street Journal

Strikes have knocked out a desalination plant on Qeshm Island in the Strait of Hormuz, Iranian media reported, without saying when the attack took place.

From Barron's

He did, however, also miss a penalty in the shootout as Japan were knocked out by Croatia in the last 16.

From BBC

Briton Oliver Bearman, so impressive in the first two races, was knocked out in the first session, while at the back the Cadillac team convincingly beat struggling Aston Martin for the first time.

From BBC

Australia is one of the world’s top three LNG exporters, behind Qatar, where strikes have knocked out about one-fifth of the world’s LNG supplies.

From The Wall Street Journal