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Definitions of reef
  1. noun
    a rocky region in the southern Transvaal in northeastern South Africa; contains rich gold deposits and coal and manganese

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  2. noun
    a submerged ridge of rock or coral near the surface of the water
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  3. verb
    lower and bring partially inboard
    "reef the sailboat's mast"
  4. noun
    one of several strips across a sail that can be taken in or rolled up to lessen the area of the sail that is exposed to the wind
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  5. verb
    reduce (a sail) by taking in a reef
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  6. verb
    roll up (a portion of a sail) in order to reduce its area
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Definition that contains reef
  • key a coral reef off the southern coast of Florida
  • granny a reef knot crossed the wrong way and therefore insecure
  • triple increase threefold
  • reef reduce (a sail) by taking in a reef
  • coral marine colonial polyp characterized by a calcareous skeleton; masses in a variety of shapes often forming reefs
  • lagoon a body of water cut off from a larger body by a reef of sand or coral
  • laguna a body of water cut off from a larger body by a reef of sand or coral
  • treble increase threefold
  • atoll an island consisting of a circular coral reef surrounding a lagoon
  • triplicate reproduce threefold
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