A wall is a structure that defines an area, carries a load; provides security, shelter, or soundproofing; or is decorative. There are many kinds of walls, including:
Walls in buildings that form a fundamental part of the superstructure or separate interior rooms, sometimes for fire safety
Border barriers between countries
Brick walls
Defensive walls in fortifications
Doors, mobile walls on hinges which open to form a gateway
Glass walls (only when most of the wall, in smaller amounts it is called a window)
Permanent, solid fences
Precast walls
Retaining walls, which hold back dirt, stone, water, or noise sound
Stone walls
Walls that protect from oceans (seawalls) or rivers (levees)
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