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
Along the Westfjords coastline, there are several beautiful kayaking and whale-watching spots.
—
Gwen Nicol, Travel + Leisure, 22 Oct. 2025
The rear-door panels depict the Mediterranean coastline around Le Rayol-Canadel-sur-Mer, where Henry Royce had a winter home.
—Howard Walker, Robb Report, 22 Oct. 2025
Sunseekers know all about the attractions of Turkey’s Aegean and Mediterranean coastlines, but the Black Sea coast in the country’s northeast offers a milder climate, spectacular scenery, architectural treasures and adventure travel without the crowds.
—Maureen O'Hare, CNN Money, 21 Oct. 2025
An exclusive economic zone, where a coastal state has sovereign rights to explore, exploit, conserve and manage natural resources, extends up to 230 miles from the coastline, according to the United Nations Convention on the Law of the Sea.
—Ryan Chan, MSNBC Newsweek, 21 Oct. 2025
See All Example Sentences for coastline
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Gwen Nicol, Travel + Leisure, 22 Oct. 2025
The rear-door panels depict the Mediterranean coastline around Le Rayol-Canadel-sur-Mer, where Henry Royce had a winter home.
—Howard Walker, Robb Report, 22 Oct. 2025
Sunseekers know all about the attractions of Turkey’s Aegean and Mediterranean coastlines, but the Black Sea coast in the country’s northeast offers a milder climate, spectacular scenery, architectural treasures and adventure travel without the crowds.
—Maureen O'Hare, CNN Money, 21 Oct. 2025
An exclusive economic zone, where a coastal state has sovereign rights to explore, exploit, conserve and manage natural resources, extends up to 230 miles from the coastline, according to the United Nations Convention on the Law of the Sea.
—Ryan Chan, MSNBC Newsweek, 21 Oct. 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 27 Oct. 2025.
Copy CitationKids Definition
coastline
noun
coast·line
ˈkōst-ˌlīn
: the outline or shape of a coast
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