Webster's Revised Unabridged Dictionary · 1913

Harmonious

Harmonious (har*mō"ni*us) , adjective

[Compare French 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.