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.

HARMONIZE
Har"mo*nize, v. t.

1. To adjust in fit proportions; to cause to agree; to show the agreement of; to reconcile the apparent contradiction of.

2. (Mus.)

Defn: To accompany with harmony; to provide with parts, as an air, or melody.

HARMONIZER
Har"mo*ni`zer, n.

Defn: One who harmonizes.

HARMONOMETER
Har`mo*nom"e*ter, n. Etym: [Gr. meter: cf. F. harmonometre.]

Defn: An instrument for measuring the harmonic relations of sounds.
It is often a monochord furnished with movable bridges.