1. in a way that relates to harmony or the combination of musical notes that sound pleasing together
Usage: music
2. in a way that is balanced, proportionate, or in agreement; harmoniously
3. in relation to harmonics or overtones in physics and acoustics
Usage: physics; acoustics

Examples

• The two instruments played harmonically, creating a beautiful blend of sound.
• The colors in the painting were arranged harmonically to please the eye.
• The strings vibrate harmonically at multiple frequencies simultaneously.
• The choir sang harmonically, with each voice part complementing the others.
• The design elements worked harmonically to create a unified aesthetic.
• The tuning fork produces harmonically related frequencies.