overtone

This term describes a secondary layer of meaning that exists beneath the surface of a conversation or piece of writing. It suggests a hidden emotional current, such as tension, irony, or hostility, which the listener perceives intuitively rather than through literal words. It is frequently used in political or diplomatic contexts to describe the subtle mood of a negotiation.

In acoustics, the word refers to the specific harmonic frequencies that give an instrument its unique character. While the fundamental frequency determines the pitch, these additional vibrations create the richness and depth of the sound, distinguishing a piano from a flute playing the same note.