reef (B1)
noun
Pronunciation: /riːf/
Definition
A ridge of rock, coral, or other material lying beneath the surface of the water.
Examples
The Great Barrier Reef is the world's largest coral reef system.
Many colorful fish live among the coral reef.
Sailors must be wary of hidden reefs when navigating shallow waters.
How to Use reef
- coral reef (collocation)
- A reef made of coral. — "Snorkeling over the vibrant coral reef was the highlight of our trip."
- reef knot (collocation)
- A simple knot used to join two ropes of equal thickness. — "He tied a secure reef knot to fasten the two ropes together."
- navigate a reef (collocation)
- To steer a vessel safely around or over a reef. — "The pilot skillfully navigated the ship through the treacherous reef."
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