close off[verb]Synonyms: isolate, cut off, enisle, insulate, island, segregate, separate, sequester
[TahlilGaran] English Synonym Dictionary ▲
close something ↔ off phrasal verb (
see also close)
to separate a road, room etc from the area around it so that people cannot go there or use it:
The roads into the docks were closed off by iron gates. [TahlilGaran] Dictionary of Contemporary English ▲