Definition of port de voix in English:

port de voix

Pronunciation /ˌpɔː də ˈvwɑː/

noun

Music
  • Originally: a kind of appoggiatura. Now: a vocal portamento.

Origin

Early 18th century. From French port de voix an appoggiatura, especially one that resolves upwards by a tone or semitone, subsequently also a vocal portamento from port + de + voix.