Luff
WordNet

noun


(1)   The act of sailing close to the wind
(2)   (nautical) the forward edge of a fore-and-aft sail that is next to the mast

verb


(3)   Flap when the wind is blowing equally on both sides
"The sails luffed"
(4)   Sail close to the wind
WiktionaryText

Noun



  1. The vertical edge of a sail that is closest to the direction of the wind.
    By easing the halyard the luff of the sail sagged to leeward.

Verb



  1. To shake due to being trimmed improperly.
  2. To alter course to windward so that the sails luff. (Alternatively luff up)
  3. to let out [a sail] so that it luffs.
  4. To alter the vertical angle of the jib of a crane so as to bring it level with the load.
 
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