noun
a submerged ridge of rock or coral near the surface of the water
noun
a rocky region in the southern Transvaal in northeastern South Africa
Synonyms
Witwatersrand
Rand
Examples
- contains rich gold deposits and coal and manganese
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
verb
lower and bring partially inboard
Examples
- reef the sailboat's mast
verb
roll up (a portion of a sail) in order to reduce its area
verb
reduce (a sail) by taking in a reef