What is Wall?

Wall definition and meaning on Dictionary terms:
any of various permanent upright constructions having a length much greater than the thickness and presenting a continuous surface except where pierced by doors, windows, etc.: used for shelter, protection, or privacy, or to subdivide interior space, to support floors, roofs, or the like, to retain earth, to fence in an area, etc.
Usually walls. a rampart raised for defensive purposes.

an immaterial or intangible barrier, obstruction, etc., suggesting a wall: a wall of prejudice.
a wall-like, enclosing part, thing, mass, etc.: a wall of fire; a wall of troops.
an embankment to prevent flooding, as a levee or sea wall.
the outermost film or layer of structural material protecting, surrounding, and defining the physical limits of an object: the wall of a blood cell.
Soccer. a line of defenders standing shoulder to shoulder in an attempt to block a free kick with their bodies.
Mining. the side of a level or drift.the overhanging or underlying side of a vein; a hanging wall or footwall.

of or relating to a wall: wall space.
growing against or on a wall: wall plants; wall cress.

situated, placed, or installed in or on a wall: wall oven; a wall safe.

verb (used with object)
to enclose, shut off, divide, protect, border, etc., with or as if with a wall (often followed by in or off): to wall the yard; to wall in the play area; He is walled in by lack of opportunity.
to seal or fill (a doorway or other opening) with a wall: to wall an unused entrance.

to seal or entomb (something or someone) within a wall (usually followed by up): The workmen had walled up the cat quite by mistake.


reference: www.dictionary.com/browse/wall