to agree in action, adaptation, or effect on the mind; to agree in sense or purport; as, the parts of a mechanism harmonize.-to be in peace and friendship, as individuals, families, or public organizations.-to agree in vocal or musical effect; to form a concord; as, the tones harmonize perfectly.-to adjust in fit proportions; to cause to agree; to show the agreement of; to reconcile the apparent contradiction of.-to accompany with harmony; to provide with parts, as an air, or melody.