To sing or utter in falsetto.
A person who sings in falsetto.
The "false" (singing) voice in any human, usually airy and lacking a purity of vowels; created by utilizing the next highest vocal folds above those used for speech and normal range singing. It is commonly confused with the head voice register.
to howl loudly or prolongedly in lamentation or joy
to produce a rapid and prolonged series of sharp noises with one's voice.