luff in WordNet English dictionary

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

1. flap when the wind is blowing equally on both sides
   "the sails luffed"
   luff 
   
2. sail close to the wind
   luff  point