Meaning of “coastline” in the English Dictionary

british dictionary

"coastline" in British English

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coastlinenoun [ C or U ]

uk /ˈkəʊst.laɪn/ us /ˈkoʊst.laɪn/

C2 the particular shape of the coast, especially as seen from above, from the sea, or on a map

(Definition of “coastline” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"coastline" in American English

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coastlinenoun [ C/U ]

us /ˈkoʊstˌlɑɪn/

the shape of the land next to the sea, esp. when seen from the air or as shown on a map

(Definition of “coastline” from the Cambridge Academic Content Dictionary © Cambridge University Press)