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
So, air conditioners running in hot regions, along the coastline, or in areas with poor air quality will experience more wear and tear than in milder climates.
—
Nafeesah Allen, Better Homes & Gardens, 10 May 2026
Residents have also raised concerns about persistent odors along the coastline.
—Kelly McGreal, FOXNews.com, 10 May 2026
Michigan truly has it all, from exciting cities and gorgeous natural wonders to plenty of watery delights along its Great Lakes coastline.
—Katy Spratte Joyce, Travel + Leisure, 9 May 2026
Reggio is the tipping point between Calabria's two coastlines.
—Lee Marshall, Condé Nast Traveler, 9 May 2026
See All Example Sentences for coastline
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Nafeesah Allen, Better Homes & Gardens, 10 May 2026
Residents have also raised concerns about persistent odors along the coastline.
—Kelly McGreal, FOXNews.com, 10 May 2026
Michigan truly has it all, from exciting cities and gorgeous natural wonders to plenty of watery delights along its Great Lakes coastline.
—Katy Spratte Joyce, Travel + Leisure, 9 May 2026
Reggio is the tipping point between Calabria's two coastlines.
—Lee Marshall, Condé Nast Traveler, 9 May 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 15 May. 2026.
Copy CitationKids Definition
coastline
noun
coast·line
ˈkōst-ˌlīn
: the outline or shape of a coast
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