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.
CLOSE (SOMETHING) OFF
Meaning of CLOSE (SOMETHING) OFF in English
Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012