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coastline

American  
[kohst-lahyn] / ˈkoʊstˌlaɪn /

noun

  • coastlines
    plural
  1. the outline or contour of a coast; shoreline.

  2. the land and water lying adjacent to a shoreline.


coastline British  
/ ˈkəʊstˌlaɪn /

noun

  1. the outline of a coast, esp when seen from the sea, or the land adjacent to it

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Other Word Forms

Noun Inflected Forms

Etymology

Origin of coastline

First recorded in 1855–60; coast + line 1

Vocabulary lists containing coastline

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

The tournament is set to draw up to 75,000 spectators to the links course, set among towering dunes on a rugged stretch of County Clare coastline.

From Barron's Sep. 11, 2026

Waves also splashed over sections of Pacific Coast Highway near Point Mugu, and in Seal Beach, coastline parking lots flooded.

From Los Angeles Times Sep. 9, 2026

Tired of the overcrowded beaches of Italy, Greece, and Spain, savvy developers are looking for new stretches of the coastline and have landed on Albania.

From Slate Sep. 8, 2026

It is simply a small boat that has departed from further along the coastline to avoid detection.

From BBC Sep. 3, 2026

One project looked at the local effects of climate change by measuring the erosion of the cliffs along the coastline.

From "The Wrong Way Home" by Kate O’Shaughnessy

It offers quiet roads along coastlines and river gorges and into mountains, among rice paddies and through towns with tiled roofs where villagers pride themselves on their Shikoku hospitality.

From The Wall Street Journal Sep. 6, 2026

We gathered images from across Kent, Surrey and Sussex, capturing the crowds, coastlines and viewing methods that helped people experience the moment.

From BBC Aug. 12, 2026

"Sanctions are being circumvented using ageing and poorly maintained tankers, putting coastlines and marine ecosystems at risk," she said.

From Barron's Aug. 6, 2026

This rapid temperature rise is causing frozen ground to thaw and coastlines to break apart.

From Science Daily Aug. 3, 2026

We learned that wildlife, like deer and butterflies, depend on native plants for survival, and if we remove the bushes and small trees along our coastlines, then hurricanes could cause increased coastal erosion.

From "Sir Fig Newton and the Science of Persistence" by Sonja Thomas

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