DuckCorp Dico

Found one definition

1.                 From WordNet (r) 3.0 (2006):
                   
   
   
                   
                     
   harmonic
       adj 1: of or relating to harmony as distinct from melody and
              rhythm; "subtleties of harmonic change and tonality"-
              Ralph Hill [ant: nonharmonic]
       2: of or relating to harmonics
       3: of or relating to the branch of acoustics that studies the
          composition of musical sounds; "the sound of the resonating
          cavity cannot be the only determinant of the harmonic
          response"
       4: relating to vibrations that occur as a result of vibrations
          in a nearby body; "sympathetic vibration" [syn: harmonic,
          sympathetic]
       5: involving or characterized by harmony [syn: consonant,
          harmonic, harmonical, harmonized, harmonised]
       n 1: a tone that is a component of a complex sound
       2: any of a series of musical tones whose frequencies are
          integral multiples of the frequency of a fundamental