[lute] n [ME, fr. MF lut, fr. OProv laut, fr. Ar al-'ud, lit., the wood] (13c): a stringed instrument having a large pear-shaped body, a vaulted back, a fretted fingerboard, and a head with tuning pegs which is often angled backward from the neck
[2]lute vt lut.ed ; lut.ing [ME, fr. L lutare, fr. lutum mud--more at pollute] (14c): to seal or cover (as a joint or surface) with lute [3]lute n (15c): a substance (as cement or clay) for packing a joint or coating a porous surface to make it impervious to gas or liquid