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English definition of “coastline”

coastline

noun [C or U]     /ˈkəʊst.laɪn/ US  /ˈkoʊst-/
C2 the particular shape of the coast , especially as seen from above, from the sea , or on a map Maps and map-makingCoasts and beachesBays and gulfs
(Definition of coastline noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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