Definition of coastline
1 : a line that forms the boundary between the land and the ocean or a lake
2 : the outline of a coast
From the M-W Editors
Examples of coastline in a sentence
The plane flew along the eastern coastline.
1856
First Known Use of coastline
1856
COASTLINE Defined for English Language Learners
coastline
playDefinition of coastline for English Language Learners
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: the land along the edge of a coast
Learn More about coastline
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See words that rhyme with coastline Spanish Central: Translation of coastline Nglish: Translation of coastline for Spanish speakers Britannica English: Translation of coastline for Arabic speakers Britannica.com: Encyclopedia article about coastline
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