au revoir UK /ˌəʊ.ɹə ˈvwɑː/US /ˌoʊ.ɹə ˈvwɑɹ/ exclamation1 •Goodbye; till we meet again.Though about it the South used to brag / I’m afraid it’s become such a drag / We should say au revoir / To the old stars and bars — 2000