wall

noun
\ ˈwȯl How to pronounce wall (audio) \

Definition of wall

 (Entry 1 of 3)

1a : a high thick masonry structure forming a long rampart or an enclosure chiefly for defense often used in plural
b : a masonry fence around a garden, park, or estate
c : a structure that serves to hold back pressure (as of water or sliding earth)
2 : one of the sides of a room or building connecting floor and ceiling or foundation and roof
3 : the side of a footpath next to buildings
4 : an extreme or desperate position or a state of defeat, failure, or ruin the surrounded troops had their backs against the wall
5 : a material layer enclosing space the wall of a container heart walls
6 : something resembling a wall (as in appearance, function, or effect) especially : something that acts as a barrier or defense a wall of reserve tariff wall
off the wall
slang : crazy the plan was off the wall
up the wall
slang : into a state of intense agitation, annoyance, or frustration the noise drove me up the wall