• noun
• synonym
• antonym

• Great Barrier Reef
  1. the Great Barrier Reef the largest CORAL REEF in the world, off the northeast coast of Australia. It is around 2000 km (1250 miles) long.
• barrier island (noun)
  1. wider than a reef a long narrow sandy island running parallel to the shore
• barrier method (noun)
  1. barrier methods of CONTRACEPTION involve the use of CONDOM s etc, which physically prevent the SPERM from reaching the egg
• barrier reef (noun)
  1. a line of CORAL (= pink stone-like substance) separated from the shore by water
• barrier strip (noun)
  1. a junction unit for connecting 2 cables without the need for plugs
• blood-brain barrier (noun)
  1. a mechanism that creates a barrier between brain tissues and circulating blood; serves to protect the central nervous system
• crash barrier (noun)
  1. a strong fence or wall built to keep cars apart or to keep them away from people, in order to prevent an accident
• heat barrier (noun)
  1. a limit to high speed flight imposed by aerodynamic heating
• ideological barrier (noun)
  1. a barrier to cooperation or interaction resulting from conflicting ideologies
• import barrier (noun)
  1. any regulation or policy that restricts international trade
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