- marked by agreement in feeling, attitude, or action: a harmonious group.
- forming a pleasingly consistent whole; congruous: harmonious colors.
- pleasant to the ear; tuneful; melodious.
- (esp of colours or sounds) fitting together well
- having agreement or consensus
- tuneful, consonant, or melodious
1540s, in music, from French harmonieux (14c.), from harmonie (see harmony). In nonmusical use from 1630s. Related: Harmoniously; harmoniousness.