also: そとかべ
outer wall; exterior wall
Refers to the external wall of a building or structure.
この建物の外壁はレンガでできている。
The outer wall of this building is made of brick.
外壁の塗装が剥がれてきた。
The paint on the exterior wall has started to peel.
We're planning to paint the house's exterior wall white next month.
The exterior wall of the old apartment building has started to peel.
We had the exterior wall, which was damaged by the earthquake, repaired.