wall something up
phrasal verbPart ofwall
wall something up — phrasal verb
1. to close an opening, doorway, or window permanently by filling it with bricks, s
1.phrasal verb
Definition
to close an opening, doorway, or window permanently by filling it with bricks, stone, or other wall material.
Example
The old fireplace had been walled up years ago when central heating was installed.
The builders walled up the extra doorway to make the room feel more private.