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reef
1[reef]
noun
a ridge of rocks or sand, often of coral debris, at or near the surface of the water.
Mining.a lode or vein.
reef
2[reef]
noun
a part of a sail that is rolled and tied down to reduce the area exposed to the wind.
verb (used with object)
to shorten (sail) by tying in one or more reefs.
to reduce the length of (a topmast, a bowsprit, etc.), as by lowering, sliding inboard, or the like.
to pull (old oakum) out of seams, as with a rave hook (often followed byout ).
reef
1/ ː /
noun
a ridge of rock, sand, coral, etc, the top of which lies close to the surface of the sea
a ridge- or mound-like structure built by sedentary calcareous organisms (esp corals) and consisting mainly of their remains
a vein of ore, esp one of gold-bearing quartz
reef
2/ ː /
noun
the part gathered in when sail area is reduced, as in a high wind
verb
to reduce the area of (sail) by taking in a reef
(tr) to shorten or bring inboard (a spar)
Reef
3/ ː /
noun
another name for the Great Barrier Reef
another name for the Witwatersrand
reef
A strip or ridge of rocks, sand, or coral that rises to or near the surface of a body of water.
See more at coral reef
Other 51Թ Forms
- unreefed adjective
51Թ History and Origins
Origin of reef1
Origin of reef2
51Թ History and Origins
Origin of reef1
Origin of reef2
Example Sentences
Aerial images show forest loss and sediment run-off into waters that are home to biodiverse coral reefs.
Titan took passengers on three more dives in the summer of 2022 - two to the Titanic and one to a nearby reef, before it failed on its next deep dive, in June 2023.
In some parts of the world - including Australia, the US and the Pacific - marine heatwaves can destroy coral reefs or local fisheries, as well as vital seagrass meadows.
The militaries of both countries are much smaller than China's, but they are holding on to a handful of reefs and islands.
Using underwater footage, it will explore the major threats to our oceans, from destructive fishing techniques to mass coral reef bleaching.
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