wall something ↔ off phrasal verb ( see also ↑ wall )
to keep one area or room separate from another, by building a wall:
The control room is walled off by soundproof glass.
wall something ↔ off phrasal verb ( see also ↑ wall )
to keep one area or room separate from another, by building a wall:
The control room is walled off by soundproof glass.
Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012