reef

definition: 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
example:
speech part: noun
synonyms:
definition: a submerged ridge of rock or coral near the surface of the water
example:
speech part: noun
synonyms:
definition: reduce (a sail) by taking in a reef
example:
speech part: verb
synonyms:
definition: roll up (a portion of a sail) in order to reduce its area
example:
speech part: verb
synonyms:
definition: lower and bring partially inboard
example: reef the sailboat's mast
speech part: verb
synonyms:

reef is explained and pronounced

How reef is being used?