wall1 S1 W1 [countable]
an upright flat structure made of stone or brick, that divides one area from another or surrounds an area [↪ fence]
around an areaDHTBB
The estate is surrounded by high stone walls.
city/garden etc wall
the ancient city walls
the Great Wall of China
We climbed over the wall into the orchard.
one of the sides of a room or building
in a building
Bob leaned against the wall.
bedroom/kitchen etc wall
We decided to paint the bathroom walls blue.
the side of something hollow, especially within the body:
The walls of the blood vessels had been damaged.
a tall mass of something such as fire or water, that stops anything from getting past:
The boat was hit by a wall of water.
a situation in which nobody will tell you what you want to know:
The police investigation was met with a wall of silence.
very angry or annoyed:
That noise is driving me up the wall (=making me annoyed).
go up the wall British English
I've got to be on time or Sarah will go up the wall.
very strange or unusual, often in an amusing way:
Some of Krista's ideas are a little off the wall.
if a company goes to the wall, it fails, especially because of financial difficulties:
Many small investors will go to the wall.
the room that you are in, especially considered as a private place:
I don't want anything repeated outside these four walls.
to reach a point where you cannot make progress, especially because something or someone is stopping you:
We seem to have come up against a brick wall in this investigation.
to be feeling extremely anxious, unhappy, or annoyed, especially because you are waiting for something or are in a situation which you cannot get away from:
The kids soon had him climbing the walls.
used to warn people to be careful what they say, because other people, especially enemies, could be listening
to reach the point when you are most physically tired when doing a sport