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 There are just 132 stations covering the 3,700 miles along the Eastern and Gulf coastlines, according to the study. Gisela Crespo, CNN, "Twitter data shows major cities are flooding more than previously thought," 5 Feb. 2020 Plus: Seas keep rising across most United States coastlines. Arlene Martinez, USA TODAY, "In California: Where was Iowa's caucus not a disaster? The Golden State," 5 Feb. 2020 Florida’s next two decades could be more disruptive than any period in its history as climate change threatens the state’s 8,500-mile coastline and chews away at its $1 trillion economy. Daniel Cusick, Scientific American, "Miami Is the “Most Vulnerable” Coastal City Worldwide," 4 Feb. 2020 As the center of the storm grazes the Carolina coastline, there will be morning rain along the coast up through the Mid-Atlantic. NBC News, "What will the weather be for Super Bowl weekend?," 31 Jan. 2020 Politicians are concerned about having the money available for coastline restoration projections. John Sharp |, al, "5 Takeaways from Alabama Congressional District 1 forum," 24 Jan. 2020 Departing from a nuclear attack or cruise missile submarine mothership, a small group of SEALs could motor to a stretch of enemy coastline and then stage a reconnaissance mission or raid inland. Kyle Mizokami, Popular Mechanics, "This Mini-Sub Is Like a Commuter Bus for Navy SEAL Commandos," 22 Jan. 2020 Sea moss is a type of red algae that grows on the Atlantic coastlines of North America, Europe, and the Caribbean Islands. Adele Jackson-gibson, Good Housekeeping, "Is Sea Moss Healthy? Here's How to Eat It for Maximum Benefits," 17 Jan. 2020 Soak up the views of the Maine coastline as the wind rips in over the dark blue Atlantic. Emily Pennington, Outside Online, "The 25 Best Accessible Trails in America," 15 Jan. 2020

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

11 Feb 2020

Cite this Entry

“Coastline.” Dictionary, Merriam-Webster, Accessed 18 Feb. 2020.

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How to pronounce coastline (audio)

English Language Learners Definition of coastline

: the land along the edge of a coast

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