noun
fall of a wall; collapse of a wall
Used for the literal or figurative collapse of a wall, especially in historical or political contexts such as the fall of the Berlin Wall.
ベルリンの壁崩壊は1989年の出来事だ。
The fall of the Berlin Wall was an event in 1989.
Compound of 壁 (kabe, 'wall') and 崩壊 (hōkai, 'collapse, destruction').