Meaning of HARMONIC in English

[har.mon.ic] adj (1570) 1: musical

2: of or relating to musical harmony or a harmonic

3: pleasing to the ear: harmonious

4: of an integrated nature: congruous -- har.mon.i.cal.ly adv

[2]harmonic n (1777) 1 a: overtone; esp: one whose vibration frequency is an integral multiple of that of the fundamental b: a flutelike tone produced on a stringed instrument by touching a vibrating string at a nodal point

2: a component frequency of a complex wave (as of electromagnetic energy) that is an integral multiple of the fundamental frequency

Merriam-Webster English vocab.      Английский словарь Merriam Webster.