coastline
US /ˈkoʊst.laɪn/
UK /ˈkoʊst.laɪn/

1.
costa, litoral
the outline of a coast, especially with regard to its shape and appearance
:
•
The rugged coastline of California is famous for its scenic beauty.
A costa acidentada da Califórnia é famosa por sua beleza cênica.
•
We walked along the sandy coastline at sunset.
Caminhamos ao longo da costa arenosa ao pôr do sol.