Curtain off
Definition 1 of 1
Pro Tip 1/3Privacy Creation
Use 'curtain off' when someone wants to create a private space within a larger area. 
She decided to curtain off a section of the dorm room for her study area.
Pro Tip 2/3Temporary Division
'Curtain off' implies a division that is not permanent; it can be easily set up or removed. 
For the play, they curtained off part of the gym to serve as backstage.
Pro Tip 3/3Visual Barrier
The phrase indicates creating a barrier that blocks view but not necessarily sound. 
During the renovation, the couple curtained off the living area to hide the mess.