Definitions of lute:

• noun:   chordophone consisting of a plucked instrument having a pear-shaped body, a usually bent neck, and a fretted fingerboard
• noun:   a substance for packing a joint or coating a porous surface to make it impervious to gas or liquid
• name:  A surname (rare: 1 in 100000 families; popularity rank in the U.S.: #12187)