Meaning of HARMONIC in English

HARMONIC

har ‧ mon ‧ ic /hɑːˈmonɪk $ hɑːrˈmɑː-/ BrE AmE adjective technical

relating to the way notes are played or sung together to give a pleasing sound:

harmonic scales

Longman Dictionary of Contemporary English.      Longman - Словарь современного английского языка.