Source : Webster's Revised Unabridged Dictionary (1913)

Harmonize \Har"mo*nize\, v. i. [imp. & p. p. {Harmonized}; p.
   pr. & vb. n. {Harmonizing}.] [Cf. F. harmoniser. ]
   1. To agree in action, adaptation, or effect on the mind; to
      agree in sense or purport; as, the parts of a mechanism
      harmonize.

   2. To be in peace and friendship, as individuals, families,
      or public organizations.

   3. To agree in vocal or musical effect; to form a concord;
      as, the tones harmonize perfectly.