LUFF
luff
Noun
- The vertical edge of a sail that is closest to the direction of the wind.
- The act of sailing a ship close to the wind.
- The roundest part of a ship's bow.
- The forward or weather leech of a sail, especially of the jib, spanker, and other fore-and-aft sails.
Verb
- To shake due to being trimmed improperly.
- To alter course to windward so that the sails luff. (Alternatively luff up)
- to let out sail so that it luffs.
- To alter the vertical angle of the jib of a crane so as to bring it level with the load.
The above text is a snippet from Wiktionary: luff
and as such is available under the Creative Commons Attribution/Share-Alike License.