seal off

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seal off

To close, bar entry to, or isolate something very tightly or securely. A noun or pronoun can be used between "seal" and "off"; often used in passive constructions. The building was sealed off after an outbreak of a deadly virus occurred in the laboratory. The country sealed its borders off in response to the massive surge in migrants in the last week. He's been sealed off in his room ever since he started writing that novel of his.
See also: off, seal

seal off

Also, seal up. Close tightly or barricade to prevent entry or exit. For example, We're sealing off the unused wing of the building, or The jar is tightly sealed up. Dating from the first half of the 1900s, this idiom uses seal in the sense of "close securely," as one used to do with a seal of wax.
See also: off, seal

seal off

v.
1. To close tightly or surround something or someplace with a barricade or cordon: The government has sealed off its borders. The police surrounded the building and sealed it off.
2. To isolate someone or something: The remote location sealed the village off from the rest of the world.
See also: off, seal
References in periodicals archive ?
"She was 72, a cancer sufferer and had breathing difficulties and couldn't use the lift because that had been sealed off too.
On Wednesday, they sealed off West Point and another densely populated town.
The drydock is sealed off by heavy steel walls with a system of ballast tanks which make it possible to open and close the gate.
SEALED OFF: Police close off part of Nuneaton town centre, while plain-clothed officers talk to a woman on the roof of the old HSBC building
Police sealed off part of Smithdown Road, Wavertree, last night
Part of the stray was sealed off by police yesterday afternoon after a member of the public reported finding the body of a white female.
ANBAR / Aswat al-Iraq: Security forces sealed off the main road in the city of Falluja after a cop was killed by a pistol with silencer in the city on Wednesday, according to a security source.
A man was arrested after police sealed off a road in Birminghamamid unconfirmed reports of gunfire.
Officers turned off the gas supply at the house and sealed off the area, while armed police stood guard outside.
The Israeli army had sealed off the area on Friday night.
A street was sealed off and an Army bomb squad called in following the discovery of a suspect container in a house in a Northumberland village.
The farm has been sealed off by the Department of Agriculture and will be kept under observation for a number of days.
Hexter has deplored, namely, splitting the past into self-contained tunnels "sealed off from ...
THE family home of movie legend Charlie Chaplin was sealed off by murder squad detectives last night after two bodies were found in the grounds.
Paparazzi record actions - invasions, sightings - that are entirely sealed off by the image thus produced: the paparazzo picture doesn't parasitically render a something else, philosophically outside the frame of what the picture can hold and prove.