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Word of the Day Tuesday, June 9, 2026

reef

/riːf/ noun · British & US
Valid in UKValid in US
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What does reef mean?

noun

A ridge of rocks or coral near the surface of the sea, or a similar underwater feature. A coral reef is a large underwater structure composed of coral, a living organism.

Example

"The snorkeler swam over the coral reef, admiring the colorful fish and coral formations."

Definition generated by AI and curated by RJS Tech Solutions LLP.

Synonyms for reef

Rhymes with reef

Etymologically related