1. Agreement in feeling or opinion; accord: live in harmony.
2. A pleasing combination of elements in a whole: color harmony; the order and harmony of the universe. See synonyms at proportion.
3. Music.
   1. The study of the structure, progression, and relation of chords.
   2. Simultaneous combination of notes in a chord.
   3. The structure of a work or passage as considered from the point of view of its chordal characteristics and relationships.
   4. A combination of sounds considered pleasing to the ear.
4. A collation of parallel passages, especially from the Gospels, with a commentary demonstrating their consonance and explaining their discrepancies.

[Middle English armonie, from Old French, from Latin harmonia, from Greek harmoniā, articulation, agreement, harmony, from harmos, joint.]

The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company. All rights reserved.