HARMO'NIOUS, adjective Adapted to each other; having the parts proportioned to each other; symmetrical. God hath made the intellectual world harmonious and beautiful without us. 1. Concordant; consonant; symphonious; musical. harmonious sounds are such as accord, and are agreeable to the ear. 2. Agreeing; living in peace and friendship; as a harmonious family or society.
Source: Webster's 1828 American Dictionary ↗ · public-domain · returned verbatim, no AI