Source : Webster's Revised Unabridged Dictionary (1913)

Tuneful \Tune"ful\, a.
   Harmonious; melodious; musical; as, tuneful notes. `` Tuneful
   birds.'' --Milton. -- {Tune"ful*ly}, adv. -- {Tune"ful*ness},
   n.

Source : WordNet®

tuneful
     adj : having a musical sound; especially a pleasing tune [syn: {melodious}]
           [ant: {tuneless}]