partition off

US /pɑːrˈtɪʃ.ən ɑːf/
UK /pɑːrˈtɪʃ.ən ɑːf/
"partition off" picture
1.

to divide a larger area into smaller sections using a partition or barrier

:
They decided to partition off a section of the room for a new office.
The large hall was partitioned off into smaller exhibition areas.