Of or relating to harmony. Pleasing to the ear: harmonic orchestral effects. Characterized by harmony: a harmonic liturgical chant. Of or relating to harmonics. Integrated in nature. Any of a series of musical tones whose frequencies are integral multiples of the frequency of a fundamental tone. A tone produced on a stringed instrument by lightly touching an open or stopped vibrating string at a given fraction of its length so that both segments vibrate. Also called overtone, partial, partial tone. The theory or study of the physical properties and characteristics of musical sound. Physics A wave whose frequency is a whole-number multiple of that of another.