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
Temperatures will be warmer inland and cooler on the coastline, but will still be above average, Garch said.
—
Elainie Colton, The Orlando Sentinel, 4 Apr. 2026
This city on Florida’s east coast is full of surprises, in addition to about 23 miles of coastline with exquisite beaches.
—Lisa Cericola, Southern Living, 3 Apr. 2026
Saturday, for areas away from the immediate coastline, highs will surge into the low and mid 70s.
—Matthew Villafane, CBS News, 3 Apr. 2026
Perched on a bluff that overlooks Irish Beach, a private area within Manchester State Park, the home boasts an unobstructed, 180-degree view of the rugged Mendocino coastline.
—Kelsey Mulvey, Vogue, 2 Apr. 2026
See All Example Sentences for coastline
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Elainie Colton, The Orlando Sentinel, 4 Apr. 2026
This city on Florida’s east coast is full of surprises, in addition to about 23 miles of coastline with exquisite beaches.
—Lisa Cericola, Southern Living, 3 Apr. 2026
Saturday, for areas away from the immediate coastline, highs will surge into the low and mid 70s.
—Matthew Villafane, CBS News, 3 Apr. 2026
Perched on a bluff that overlooks Irish Beach, a private area within Manchester State Park, the home boasts an unobstructed, 180-degree view of the rugged Mendocino coastline.
—Kelsey Mulvey, Vogue, 2 Apr. 2026
See All Example Sentences for coastline
Cite this Entry
“Coastline.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/coastline. Accessed 6 Apr. 2026.
Copy CitationKids Definition
coastline
noun
coast·line
ˈkōst-ˌlīn
: the outline or shape of a coast
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