reef
noun
a ridge of rocks or sand, often of coral debris, at or near the surface of the water.
reefs
-
present tense formof reef (3rd person singular).present tense
Used to describe things happening now or regularly.
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
The discovery could lead to new techniques for restoring coral reefs, which some estimates suggest could disappear within decades as climate change fuels increasingly severe and frequent marine heat waves.
From Science Daily ● Oct. 19, 2026
Finding and supplying those matches across entire reefs would be impractical.
From Science Daily ● Oct. 19, 2026
The area borders the vast Rose Atoll marine sanctuary, where endangered species of hawksbill turtle thrive on vibrant reefs.
From Barron's ● Oct. 19, 2026
Scientists have spent decades searching for ways to protect coral reefs from rising ocean temperatures, disease, increasingly acidic seawater, and other environmental pressures.
From Science Daily ● Oct. 19, 2026
Without access to coral reefs or productive shallow waters, and with their terrestrial birds quickly exterminated, Easter Islanders turned to constructing chicken houses for intensive poultry farming.
From "Guns, Germs, and Steel: The Fates of Human Societies" by Jared M. Diamond
