n. A combination of tones that is pleasing to the ear; concord of sounds or tones.n. Especially, in music: Music in general, regarded as an agreeable combination of tones.n. Any simultaneous combination of consonant or related tones; a concord.n. Specifically, a common chord or triad. See triad.n. The entire chordal structure of a piece, as distinguished from its melody or its rhythm.n. The science of the structure, relations, and practical combination of chords: the fundamental branch of the science of musical composition.n. Any arrangement or combination of related parts or elements that is consistent or is esthetically pleasing; agreement of particulars according to some standard of consistency or of the esthetic judgment; an accordant, agreeable, or suitable conjunction or assemblage of details; concord; congruity.n. Accord, as in action or feeling; agreement, as in sentiment or interests; concurrence; good understanding; peace and friendship.n. A collation of parallel passages from different works treating of the same subject, for the purpose of showing their agreement and of explaining their apparent discrepancies.n. In anatomy, same as harmonia, 1.n. The tonic, dominant, and subdominant triads of a major key.n. Correspondence, consistency, congruity; amity.