coastline

noun

coast·​line ˈkōs(t)-ˌlīn How to pronounce coastline (audio)
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
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
From interesting architecture and world-class museums to golden coastlines and attractive seaside promenades, here are some of the top destinations for sun, sand and culture. Joanne Shurvell, Forbes.com, 11 Aug. 2025 Croatia is a narrow country, approximately 3,500 miles long, which makes starting in the north and heading south along the Adriatic coastline – or reversing the order – a straightforward itinerary. Amy Nelson, Twin Cities, 10 Aug. 2025 Keep your eyes open along the coastline for nesting terns. Jeri Clausing, AFAR Media, 7 Aug. 2025 Saint Lucia Saint Lucia, known for the iconic Pitons and lush coastlines, is building a compelling identity as both a tourism gem and a business-friendly hub. Panorama Media Ltd, Miami Herald, 6 Aug. 2025 See All Example Sentences for coastline

Word History

First Known Use

1856, in the meaning defined at sense 1

Time Traveler
The first known use of coastline was in 1856

Browse Nearby Words

Cite this Entry

“Coastline.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/coastline. Accessed 22 Aug. 2025.

Kids Definition

coastline

noun
coast·​line ˈkōst-ˌlīn How to pronounce coastline (audio)
: the outline or shape of a coast
Last Updated: - Updated example sentences
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