seal off
Intermediate (B1)neutral
To completely close an area so nobody can get in or out
"Police sealed off the street after reports of a suspicious package."
Hear it in context
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immediately seal off the entire city.
The man became the richest person in a world of devalued prices with three hundred dollars.
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She had the guards seal off the area.
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them seal off all ports to help prevent
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When you seal off a 2-acre block
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have us seal off the zone so completely.