barrier island

plural barrier islands

1. An island that is close to, and parallel to, the main coastline.

   1 more example

   Perhaps as startling as the sheer toll was the devastation to some of the state’s well-known locales. Boardwalks along the beach in Seaside Heights, Belmar and other towns on the Jersey Shore were blown away. Amusement parks, arcades and restaurants all but vanished. Bridges to barrier islands buckled, preventing residents from even inspecting the damage to their property.

   2012 October 31, David M. Halbfinger, New York Times, retrieved 31 Oct 2012