noun
Refers to the top or ridge of a mountain. Can be used literally for mountain peaks or figuratively for the height of something.
富士山の峰は雪で覆われていた。
The peak of Mt. Fuji was covered with snow.
彼
He finally reached the peak of his career.
noun
back of a blade
Specifically the blunt back edge of a single-edged blade like a katana. Contrasts with the cutting edge (刃).
刀の峰で相手の腕を打った。
He struck the opponent's arm with the back of the blade.