coastline
Proposed by a contributor, not yet supported by evidence.
Also seen as: coastlines
Meaning · English
The shape, outline, or boundary of a coast. (The term coastline is generally used to describe the approximate boundaries at relatively large spatial scales.)
Noun
Examples
The sweep of the rocky Southern California coastline off Point Fermin.
Usage example from English Wiktionary (CC BY-SA 4.0, retrieved 2026-08-01)
Sources & notes
Adapted from English Wiktionary (CC BY-SA 4.0, retrieved 2026-08-01 via kaikki.org).
Common questions
What does “coastline” mean?
The shape, outline, or boundary of a coast. (The term coastline is generally used to describe the approximate boundaries at relatively large spatial scales.)
Is “coastline” formal or informal?
No register label has been reviewed yet — treat it as neutral and check the usage notes above.