Exhibiting harmony or being in harmony; having parts, forms, relations, or proportions properly accordant each with the others, so that all taken together constitute a consistent or an esthetically pleasing whole; also, being in harmony or concord with something else; congruous.Specifically, in music, concordant; consonant; symphonious; agreeable to the ear. See harmony.Marked by harmony in action or feeling; acting or living in concord; peaceable; friendly: as, harmonious government; a harmonious family.Synonyms Melodious, dulcet, tuneful.Amicable, brotherly, neighborly, cordial.