Meaning of WALL in English
( n. )
A work or structure of stone, brick, or other materials, raised to some height, and intended for defense or security, solid and permanent inclosing fence, as around a field, a park, a town, etc., also, one of the upright inclosing parts of a building or a room.
Webster's Revised Unabridged English Dictionary. Пересмотренный полный словарь английского языка Webster. 2012