A bending in a coastline, mountain-chain, etc. Cf. bight, n. 1. Obsolete.

A bending or curved geographical feature, as an indentation in a coast line or mass of ice, a bend in a river, etc. Also figurative.

A receding part or indentation in the line of some natural feature or object, such as a rock, coastline, mountain range, etc. Now rare.

In extended use: a fold, a wrinkle; a ridged, indented, or folded area in an animal or vegetable structure; a wrinkle or wrinkles caused by the…