The combination of simultaneously sounded musical notes to produce a pleasing effect. The choir's harmony was so beautiful that it moved the audience to tears.
A pleasing arrangement of parts; congruence. The interior design of the room was in perfect harmony with the natural surroundings.
The two countries worked in harmony to achieve a peaceful resolution.
The study or theory of the combination of musical notes in chords and progressions. He is learning harmony as part of his music degree.