Pertaining or relating to harmony of sounds; of or pertaining to music; in general, concordant; consonant; in music, specifically, pertaining to harmony, as distinguished from melody and rhythm.In acoustics, noting the secondary tones which accompany the primary tone in a complex musical tone. See II., 1.In mathematics, involving or of the nature of the harmonic mean; similar to or constructed upon the principle of the harmonic curve.In anatomy, forming or formed by a harmonia: as, a harmonic articulation or suture.Also harmonical.In music, the analysis of the harmonic structure of a piece.The amplification of a harmonic passage by the introduction of passing-notes, etc.n. In acoustics: A secondary or collateral tone involved in a primary or fundamental tone, and produced by the partial vibration of the body of which the complete vibration gives the primary tone.n. A harmonic tone.In function theory, two pairs of points, one pair the intersections of a circle about with a circle through the other pair.