Wall n. : A kind of knot often used at the end of a rope; a wall knot; a wale.

Wall 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.

Wall n. : A defense; a rampart; a means of protection; in the plural, fortifications, in general; works for defense.

Wall n. : An inclosing part of a receptacle or vessel; as, the walls of a steam-engine cylinder.

Wall n. : The side of a level or drift.

Wall n. : The country rock bounding a vein laterally.

Wall v. t. : To inclose with a wall, or as with a wall.

Wall v. t. : To defend by walls, or as if by walls; to fortify.

Wall v. t. : To close or fill with a wall, as a doorway.

Example:
what Walls should i paint a darker shade, the Wall by the window or the opposite Wall?

Taxonomy
walls, Building walls, Boundary walls, Retaining walls, fence, free encyclopedia, barrier, city walls, the Berlin Wall, stone, other side, elements, The Wall, Stone wall, thickness, protective walls, one side, hotel.

Defination from the web:
wall delineates a building and supports its superstructure, separates space in buildings into rooms, or protects or delineates a ... In architecture and civil engineering, the term curtain wall refers to the facade of a building which is not load-bearing but functions as ...