- IPA: /lʌf/
luff (plural luffs)
- (nautical) The vertical edge of a sail that is closest to the direction of the wind.
- By easing the halyard, the luff of the sail was made to sag to leeward.
- (nautical) The act of sailing a ship close to the wind.
- (nautical) The roundest part of a ship's bow.
- (nautical) The forward or weather leech of a sail, especially of the jib, spanker, and other fore-and-aft sails.
- Italian: inferitura
luff (luffs, present participle luffing; past and past participle luffed)
- (nautical, of a sail, intransitive) To shake due to being trimmed improperly.
- (nautical, of a boat, intransitive) To alter course to windward so that the sails luff. (Alternatively luff up)
- (nautical, transitive) to let out (a sail) so that it luffs.
- (mechanical) To alter the vertical angle of the jib of a crane so as to bring it level with the load.