close off

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close off

1. To prevent access to a particular area or thing. In this usage, a noun or pronoun can be used between "close" and "off." We had to close off that section of the restaurant for a private party. I had to take a detour on my way home because the water department closed off a bunch of streets.
2. To avoid emotional connection with others; to isolate. In this usage, a reflexive pronoun can be used between "close" and "off." Todd really closed himself off after his last break-up. I have a hard time making friends because I usually close myself off from other people.
3. To refuse to listen to viewpoints, ideas, or opinions that differ from one's own. In this usage, a reflexive pronoun can be used between "close" and "off." Grandpa, you can't just close yourself off to the ways of the modern world. Can you please listen to what I think, instead of automatically closing yourself off?
See also: close, off

close something off

to prevent entrance into something; to block something off. Please don't close this passageway off. They closed off the passageway anyway.
See also: close, off

close off

v.
To prevent passage along or through something: The police closed off the main avenue for a parade. Park rangers closed the lake off to motorboats.
See also: close, off
References in periodicals archive ?
police tape closes off Vyse Street at its junction with Hylton Street, Hockley.
Melt escaping from the leakage position closes off a monitoring nozzle, which is detected by the air-pressure sensor, and a message appears on the control device.
It automatically closes off your palate when an object, such as a toothbrush, touches the back of your throat.
Others say the proposal merely closes off forestlands, which does not adequately address issues of productive, multiple-use land management.
In place of the old fourth wing, which being in bad condition was pulled down, there is a new and surprising intrusion into the old fabric; a glass walled building which closes off the old courtyard,the Pati de Les Dones.
In normal sitting posture, the act of swallowing automatically closes off the trachea, or airway.
In similar tests, the same cell lines became five to 10 times more sensitive to adriamycin when exposed to verapamil, a compound that binds to and closes off the protein pump.
The disease often has no symptoms until late in the disease state, when an artery closes off causing a heart attack, stroke or other vascular problems.
Located in the bushing downstream of the breaker plate, this ball valve closes off the melt channel to isolate any equipment farther upstream.