Save Gender Feminine Usage French (Rare), French (Cajun, Archaic), Theatre Meaning & History French form of Deianeira (or Deïanira, Dejanira). Déjanire (1911) is an opera (tragédie lyrique) in 4 acts composed by Camille Saint-Saëns to a libretto in French by Louis Gallet and Camille Saint-Saëns.