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 federal agency is embarking on the Los Angeles Coastal Area Special Resource Study, which focuses on the coastline and adjacent areas along Santa Monica Bay from Will Rogers State Beach to Torrance Beach, including areas around Ballona Creek, as well as San Pedro.
—
Ian James, Los Angeles Times, 7 Feb. 2026
Waves as tall as 10 feet will hit west-facing beaches starting Friday, producing rip currents along the entire San Diego County coastline, the National Weather Service says.
—Gary Robbins, San Diego Union-Tribune, 5 Feb. 2026
The team traveled along the entire length of the coastline from Buenos Aires to an offshore area near Tierra del Fuego, about 1,900 miles south.
—Michelle Del Rey, USA Today, 4 Feb. 2026
Trinidad Considered the birthplace of Carnival, Trinidad draws travelers from around the world to its hillsides, coastlines, and bustling downtown streets to lime (party), wine (dance), and test the limits of endurance.
—Kristin Braswell, Travel + Leisure, 3 Feb. 2026
See All Example Sentences for coastline
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Ian James, Los Angeles Times, 7 Feb. 2026
Waves as tall as 10 feet will hit west-facing beaches starting Friday, producing rip currents along the entire San Diego County coastline, the National Weather Service says.
—Gary Robbins, San Diego Union-Tribune, 5 Feb. 2026
The team traveled along the entire length of the coastline from Buenos Aires to an offshore area near Tierra del Fuego, about 1,900 miles south.
—Michelle Del Rey, USA Today, 4 Feb. 2026
Trinidad Considered the birthplace of Carnival, Trinidad draws travelers from around the world to its hillsides, coastlines, and bustling downtown streets to lime (party), wine (dance), and test the limits of endurance.
—Kristin Braswell, Travel + Leisure, 3 Feb. 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 Feb. 2026.
Copy CitationKids Definition
coastline
noun
coast·line
ˈkōst-ˌlīn
: the outline or shape of a coast
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