Barrier Island Definition

bărē-ər
noun
A long, relatively narrow island running parallel to the mainland, built up by the action of waves and currents and serving to protect the coast from erosion by surf and tidal surges.
American Heritage
A long, narrow island, parallel to the coastline, formed from deposits of sand and sediment thrown up by the waves, that serves the shore as a protective barrier against tidal waves, storms, etc.
Webster's New World

An island close to, and parallel to, the main coastline.

Wiktionary
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other
A long, narrow sand island that is parallel to the mainland and serves to protect the coast from erosion. Barrier islands typically have dunes along the exposed outer side, zones of vegetation in the interior, and swampy areas along the inner lagoon.
American Heritage Science
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Other Word Forms of Barrier Island

Noun

Singular:
barrier island
Plural:
barrier islands

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