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reef
noun
- a line or ridge of rock, coral, or sand lying at or near the surface of the water
- Mining a bed or vein of ore; lode
noun
Naut. a part of a sail which can be folded or rolled up and made fast to reduce the area exposed to the wind, as during a storm
transitive verb
- to reduce the size of (a sail) by taking in part of it
- to lower (a spar or mast) or reduce the projection of (a bowsprit)
See reef in American Heritage Dictionary 4
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