Har‐mo″ni‐ous (här‐mō″nĭ‐ŭs), a. [Cf. F. harmonieux. See Harmony.] 1. Adapted to each other; having parts proportioned to each other; symmetrical.
God hath made the intellectual world harmonious and beautiful without us. Locke.
2. Acting together to a common end; agreeing in action or feeling; living in peace and friendship; as, an harmonious family.
3. Vocally or musically concordant; agreeably consonant; symphonious.
— Har‐mo″ni‐ous‐ly, adv. — Har‐mo″ni‐ous‐ness, n.