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

Many of the Florida bites were likely from blacktip sharks, which occupy breeding grounds that stretch along the northeast Florida coastline, the Florida Museum of Natural History noted in the statement. —Katie Hunt, CNN, 11 Feb. 2025

Trump's plan, articulated without consultation with Jordan or Egypt, would involve the U.S. taking over Gaza, a small Palestinian territory with a Mediterranean coastline. —Jane Arraf, NPR, 11 Feb. 2025

The heart of the place is about 100 miles of Mediterranean coastline—a temperate zone south of the Galilee hills and north of the Negev desert with an average width until the Jordan River of about 50 miles. —Justin Gest, Newsweek, 11 Feb. 2025

All of the Texas coastline is considered public land, from the water to the dune line. —Amanda Ogle, Travel + Leisure, 8 Feb. 2025

Word History

First Known Use

1856, in the meaning defined at sense 1

Kids Definition

coastline

noun

coast·​line ˈkōst-ˌlīn 

: the outline or shape of a coast