noun
- the outline or boundary where land meets the sea or ocean
Usage: plural of coastline
Examples
- The hurricane damaged coastlines along the entire eastern seaboard.
- California’s coastlines are famous for their dramatic cliffs and beaches.
- Rising sea levels threaten many of the world’s coastlines.
- The rocky coastlines of Maine attract thousands of tourists each year.
- Erosion is gradually changing the shape of these ancient coastlines.
- Scientists study coastlines to understand how they change over time.