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1. A submerged ridge of rock or coral near the surface of the water
    
2. 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

1. Lower and bring partially inboard
   "reef the sailing boat's mast"
    
2. Roll up (a portion of a sail) in order to reduce its area
    
3. Reduce (a sail) by taking in a reef

1. A rocky region in the southern Transvaal in northeastern South Africa; contains rich gold deposits and coal and manganese
   - Witwatersrand, Rand

Derived forms: reefs, reefing, reefed

Type of: bring down, furl, get down, let down, lower, part, reduce, region, ridge, roll up, shrink, slip, strip, take down

Part of: canvas, canvass, sail, sheet, Transvaal

Encyclopedia: Reef