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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