B1nounnatureenvironment
US/riːf/
UK/riːf/
a long line of rock, sand or coral just below or near the surface of the sea
In context
Tourists come from all over the world to dive on the reef.
Rising sea temperatures are killing large areas of the coral reef.
The ship hit a reef and began to take on water.
Words that go with reef
noun + noun
- coral reefThe coral reef is home to thousands of species.
- Great Barrier ReefThe Great Barrier Reef is visible from space.
- reef fishReef fish come in bright colors.
- reef sharkA reef shark rarely attacks people.
verb + preposition
- dive on a reefWe dived on a reef near the island.
adjective + noun
- healthy reefA healthy reef protects the coast from waves.