coral reef

Definitions of coral reef
  1. noun
    a reef consisting of coral consolidated into limestone
    see moresee less
    show 5 examples...
    hide 5 examples...
    Great Barrier Reef
    the largest coral reef in the world; in the Coral Sea off the northeastern coast of Australia
    an atoll in the Marshall Islands; formerly used by the United States as a site for testing nuclear weapons
    an atoll in the Marshall Islands; site of an amphibious assault in World War II; later used temporarily by the United States to test atomic bombs
    an atoll in the western Marshall Islands that was used as a Japanese air and naval base during World War II
    Midway Islands
    an atoll in the Hawaiian Islands some 1300 miles to the northwest of Honolulu; site of an important United States naval base
    an island consisting of a circular coral reef surrounding a lagoon
    barrier reef
    a long coral reef near and parallel to the shore
    Florida key, cay, key
    a coral reef off the southern coast of Florida
    type of:
    a submerged ridge of rock or coral near the surface of the water
Word Family

Test prep from the experts

Boost your test score with programs developed by’s experts.

  • Proven methods: Learn faster, remember longer with our scientific approach.
  • Personalized plan: We customize your experience to maximize your learning.
  • Strategic studying: Focus on the words that are most crucial for success.


  • Number of words: 500+
  • Duration: 8 weeks or less
  • Time: 1 hour / week


  • Number of words: 500+
  • Duration: 10 weeks or less
  • Time: 1 hour / week


  • Number of words: 700+
  • Duration: 10 weeks
  • Time: 1 hour / week