From Longman Dictionary of Contemporary Englishadieua‧dieu /əˈdjuː/ noun (plural adieus or adieux /əˈdjuːz/) [countable] literary GOODBYEgoodbye He bid her adieu. —adieu interjection
Examples from the Corpus
adieu• Within an hour he had kissed Maeve adieu and they were on the road south to Westminster.• They bade both the merchant and his paramour adieu.bid ... adieu• The lady prioress, a pure wool cloak wrapped around her, came down to bid us adieu.Origin adieu (1300-1400) French “to God” 