Great Barrier Reef

noun

1. a coral reef parallel to the coast of Queensland, in NE Australia. 1,250 miles (2,010 km) long.

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