wall something off
phrasal verbPart ofwall
wall something off — phrasal verb
1. to separate an area or part of a building from the rest by building a wall.
1.phrasal verb
Definition
to separate an area or part of a building from the rest by building a wall.
Example
The warehouse manager walled off the unused part of the building to save on heating costs.
The damaged section of the tunnel was walled off for safety reasons.