DuckCorp Dico

Found one definition

1.                 From WordNet (r) 3.0 (2006):
                   
   
   
                   
                     
   lute
       n 1: a substance for packing a joint or coating a porous surface
            to make it impervious to gas or liquid [syn: lute,
            luting]
       2: chordophone consisting of a plucked instrument having a pear-
          shaped body, a usually bent neck, and a fretted fingerboard