What is Quaver?

Quaver definition and meaning on Dictionary terms:
verb (used without object)
to shake tremulously; quiver or tremble: He stood there quavering with fear.
to sound, speak, or sing tremulously: Her voice quavered a moment and then she regained control.
to perform trills in singing or on a musical instrument.

verb (used with object)
to utter, say, or sing with a quavering or tremulous voice.

a quavering or tremulous shake, especially in the voice.
a quavering tone or utterance.

Music (chiefly British ). an eighth note.


reference: https://www.dictionary.com/browse/quaver