Learn how to say Overtone correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word overtone:
1a musical tone which is a part of the harmonic series above a fundamental note, and may be heard with it.
Physics a component of any oscillation whose frequency is an integral multiple of the fundamental frequency.
2 (often overtones) a subtle or subsidiary quality, implication, or connotation:
the decision may have political overtones
mid 19th century: from over- + tone, suggested by German Oberton