a small indentation or recess in the shoreline of a sea, lake, or river.

a sheltered nook.

a hollow or recess in a mountain; cave; cavern.

a narrow pass between woods or hills.

a sheltered area between woods or hills.

Architecture .

a concave surface or molding.

a concave surface forming part of a ceiling at its edge so as to eliminate the usual interior angle between the wall and ceiling.

to make or become a cove.

noun

anchorage , arm , bay , bayou , bight , cave , cavern , creek , estuary , firth , frith , gulf , harbor , hole , lagoon , nook , retreat , slough , sound , wash , inlet , basin , molding , pass , recess , valley