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barrier reef

noun
1.
a reef of coral running roughly parallel to the shore and separated from it by a wide, deep lagoon.
Origin
1795-1805
1795-1805

Barrier Reef

Great Barrier Reef

noun
1.
a coral reef parallel to the coast of Queensland, in NE Australia. 1250 miles (2010 km) long.
Also called Barrier Reef.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for barrier reefs

barrier reef

noun
1.
a long narrow coral reef near and lying parallel to the shore, separated from it by deep water See Great Barrier Reef

Great Barrier Reef

noun
1.
a coral reef in the Coral Sea, off the NE coast of Australia, extending for about 2000 km (1250 miles) from the Torres Strait along the coast of Queensland; the largest coral reef in the world
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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barrier reefs in Science
barrier reef  
A long, narrow ridge of coral that runs parallel to the mainland and is separated from it by a deep lagoon. Compare atoll, fringing reef.

The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Encyclopedia Article for barrier reefs

barrier reef

a coral reef (q.v.) roughly parallel to a shore and separated from it by a lagoon or other body of water. A barrier reef is usually pierced by several channels that give access to the lagoon and the island or continent beyond it.

Learn more about barrier reef with a free trial on Britannica.com
Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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