falsetto

/fɔlˈsɛt.oʊ/

IPA: /F AO0 L S EH1 T OW0/

noun
  1. 1

    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.

  2. 2

    A person who sings in falsetto.

verb
  1. 1

    To sing or utter in falsetto.

Source: https://en.wiktionary.org/wiki/falsetto