coast·​line | \ ˈkōs(t)-ˌlīn How to pronounce coastline (audio) \

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

Examples of coastline in a Sentence

The plane flew along the eastern coastline.
Recent Examples on the Web The Cape Cod National Seashore is one of the few stretches of coastline not facing a lifeguard shortage this summer, which should help ease fears among beachgoers about any lapse in a key line of defense against shark attacks., 6 June 2021 The government has banned fishing along about 80 kilometers (50 miles) of coastline. Bharatha Mallawarachi, ajc, 6 June 2021 The government has banned fishing along about 50 miles of coastline. NBC News, 6 June 2021 The government already has banned fishing along about 80 kilometers (50 miles) of coastline. Time, 3 June 2021 With nearly a dozen spanning the length of the coastline, each lighthouse will offer you a unique view and a piece of Oregon history. oregonlive, 3 June 2021 Fitts’ legal team argued that Santa Monica Bay was actually part of the coastline. Los Angeles Times, 26 May 2021 Now Galveston boasts more than 30 miles of coastline—perfect for a relaxing day at the beach. Jennifer Miko, Chron, 17 May 2021 With 18,950 miles of coastline, Africa is home to plenty of amazing beaches. Melanie Van Zyl, Travel + Leisure, 16 May 2021

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'coastline.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of coastline

1856, in the meaning defined at sense 1

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Time Traveler for coastline

Time Traveler

The first known use of coastline was in 1856

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Statistics for coastline

Last Updated

9 Jun 2021

Cite this Entry

“Coastline.” Dictionary, Merriam-Webster, Accessed 17 Jun. 2021.

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English Language Learners Definition of coastline

: the land along the edge of a coast


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