coastline
noun
coast·line
ˈkōs(t)-ˌlīn 
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 risk of a major hurricane, with winds of more than 111 mph, making landfall somewhere along the entire U.S. mainland coastline is about 51%, according to the update.
—
Dinah Voyles Pulver, USA Today, 12 June 2025
Notable stops on this route include Sequim (which draws visitors in summer with its lavender fields) and Forks, the rainiest town in the lower 48 that was made famous by the Twilight series—and serves as a good base for checking out the Pacific coastline.
—Chloe Arrojado, AFAR Media, 11 June 2025
All countries have the right to conduct freedom of navigation and overflight within an EEZ, a maritime area beyond and adjacent to a nation's territorial sea—which extends up to 13.8 miles from the coastline—according to the United Nations Convention on the Law of the Sea.
—Ryan Chan, MSNBC Newsweek, 10 June 2025
Stroll along its narrow cobblestone streets and charming marina, often dubbed mini-Venice, or visit its 13th-century Saint Lawrence’s Cathedral—housing the Renaissance Chapel of St. John and a 140-step bell tower boasting 360-degree views over Trogir the sparkling Adriatic coastline.
—Lewis Nunn, Forbes.com, 10 June 2025
See All Example Sentences for coastline
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Dinah Voyles Pulver, USA Today, 12 June 2025
Notable stops on this route include Sequim (which draws visitors in summer with its lavender fields) and Forks, the rainiest town in the lower 48 that was made famous by the Twilight series—and serves as a good base for checking out the Pacific coastline.
—Chloe Arrojado, AFAR Media, 11 June 2025
All countries have the right to conduct freedom of navigation and overflight within an EEZ, a maritime area beyond and adjacent to a nation's territorial sea—which extends up to 13.8 miles from the coastline—according to the United Nations Convention on the Law of the Sea.
—Ryan Chan, MSNBC Newsweek, 10 June 2025
Stroll along its narrow cobblestone streets and charming marina, often dubbed mini-Venice, or visit its 13th-century Saint Lawrence’s Cathedral—housing the Renaissance Chapel of St. John and a 140-step bell tower boasting 360-degree views over Trogir the sparkling Adriatic coastline.
—Lewis Nunn, Forbes.com, 10 June 2025
See All Example Sentences for coastline
Cite this Entry
“Coastline.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/coastline. Accessed 17 Jun. 2025.
Copy CitationKids Definition
coastline
noun
coast·line
ˈkōst-ˌlīn
: the outline or shape of a coast
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