Wall

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

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.

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

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

The side of a level or drift.

The country rock bounding a vein laterally.

To inclose with a wall, or as with a wall.

To defend by walls, or as if by walls; to fortify.

To close or fill with a wall, as a doorway.

(anatomy) a layer (a lining or membrane) that encloses a structure; "stomach walls"

an architectural partition with a height and length greater than its thickness; used to divide or enclose an area or to support another structure; "the south wall had a small window"; "the walls were covered with pictures"

a vertical (or almost vertical) smooth rock face (as of a cave or mountain)

surround with a wall in order to fortify

an embankment built around a space for defensive purposes; "they stormed the ramparts of the city"; "they blew the trumpet and the walls came tumbling down"

a difficult or awkward situation; "his back was to the wall"; "competition was pushing them to the wall"