noun

coastline

coastline, shoreline

Britain has a very long coastline.

Britain has a very long coastline.

We walked along the rugged coastline.

We walked along the rugged coastline.

((a/the)) coastline the line where the land meets the sea Britain has a very long coastline.

Synonyms: shore, shoreline, seaboard

A compound word from 'coast' (from Old French 'coste', meaning 'rib, side, slope, coast') and 'line'. Literally the 'line of the coast'.

Picture a line drawn on a map where the land meets the sea. That is the coastline.

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