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
With a double harbor set at the tip of a long and sinewy peninsula on a highly strategic coastline, Knidos grew rich from its favorable natural position and from trading wine, olive oil and vast quantities of amphorae.
—
Rebecca Ann Hughes, Forbes.com, 5 July 2025
The state forecasts eroding coastlines will endanger $18 billion of existing homes and commercial buildings in the coming decades, and San Francisco officials have already decided to close part of one seaside highway rather than defend it.
—Bloomberg, Mercury News, 2 July 2025
The presence of the Howard O. Lorenzen—capable of collecting data on missile launches—near the Chinese coastline comes as the Pentagon warns of a growing missile threat posed by China to U.S. bases, allies, and partners in the Indo-Pacific region.
—Ryan Chan, MSNBC Newsweek, 1 July 2025
The storm was around 155 miles southwest of Zihuatanejo, on Mexico's Pacific coastline, on June 30 and is expected to pass off the Baja California Peninsula this week.
—Cybele Mayes-Osterman, USA Today, 1 July 2025
See All Example Sentences for coastline
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Rebecca Ann Hughes, Forbes.com, 5 July 2025
The state forecasts eroding coastlines will endanger $18 billion of existing homes and commercial buildings in the coming decades, and San Francisco officials have already decided to close part of one seaside highway rather than defend it.
—Bloomberg, Mercury News, 2 July 2025
The presence of the Howard O. Lorenzen—capable of collecting data on missile launches—near the Chinese coastline comes as the Pentagon warns of a growing missile threat posed by China to U.S. bases, allies, and partners in the Indo-Pacific region.
—Ryan Chan, MSNBC Newsweek, 1 July 2025
The storm was around 155 miles southwest of Zihuatanejo, on Mexico's Pacific coastline, on June 30 and is expected to pass off the Baja California Peninsula this week.
—Cybele Mayes-Osterman, USA Today, 1 July 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 12 Jul. 2025.
Copy CitationKids Definition
coastline
noun
coast·line
ˈkōst-ˌlīn
: the outline or shape of a coast
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