Meaning of OVERTONE in English
1》 a musical tone which is a part of the harmonic series above a fundamental note, and may be heard with it.
2》 a subtle or subsidiary quality, implication, or connotation.
3》 Physics a component of any oscillation whose frequency is an integral multiple of the fundamental frequency.
C19: from over- + tone , suggested by Ger. Oberton .
Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004