A steep, sheer cliff or precipice (a high, abruptly dropping rock face), often dangerous.
彼らは断崖の縁に立って海を見下ろした。
They stood on the edge of the precipice and looked down at the sea.
晴れた日でも断崖の上は風が強くて危険だ。
Even on a clear day the top of the cliff is windy and dangerous.
その村は断崖の上に築かれているため、景色が素晴らしい。
Because the village is built on top of a cliff, the view is magnificent.