adieu /əˈdjuː/exclamation 1noun 1forms 2 exclamation1 •Said to wish a final farewell; goodbye.BEATRICE. What fire is in mine ears? Can this be true? Stand I condemn'd for pride and scorn so much? Contempt, farewell! and maiden pride, adieu! No glory lives behind the back of such. — 1598 noun1 •A farewell, a goodbye; especially a fond farewell, or a lasting or permanent farewell.We bid our final adieus to our family, then boarded the ship, bound for America. formsadieus · adieux