Barrier island

Definition of Barrier island: A barrier islands is a ridge of sand that runs parallel to the main coast but is separated from it by a bay or lagoon. A detached portion of a barrier beach between two inlets. An offshore sand bar that rises above the mean high-water level, forming an island. An sandy island formed on a barrier reef. . This is the common definition for Barrier island, other definitions can be discussed in the article

See also

Classification of sandy coastlines