Synonyms of 'seal something off'
▷ See seal
isolateDictionary, segregate, quarantine
the anti-personnel door that sealed off the chamber
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If people or animals are quarantined, they are stopped from having contact with other people or animals. If a place is quarantined, people and animals are prevented from entering or leaving it.
It is sensible to quarantine all new plants for a week or two.
Thesaurus for seal something off from the Collins English Thesaurus