overtone

An ulterior, usually implicit meaning or quality; an implication or a hint.

In music, a harmonic. See harmonic, n., 1.

One of the harmonics faintly heard with and at a higher frequency than a fundamental tone as it dies away, produced by some aliquot portion of the vibrating sting or column of air which yields the fundamental tone; one of the natural harmonic scale of tones, as the octave, twelfth, fifteenth, etc.; an aliquot or “partial” tone; a harmonic. See harmonic, and tone.

A tone whose frequency is an integer multiple of another; a harmonic

An implicit meaning, as opposed to a hidden meaning or undertone.

(usually plural) an ulterior implicit meaning or quality

a harmonic with a frequency that is a multiple of the fundamental frequency