: an expression of good wishes when someone leaves : goodbye a heartfelt adieu bid his teammates adieu —often used interjectionally Adieu, my friends!

Is Adieu a final goodbye?

As nouns the difference between adieu and goodbye

is that adieu is a farewell, a goodbye; especially a fond farewell, or a lasting or permanent farewell while goodbye is an utterance of goodbye, the wishing of farewell to someone.

What is adieu farewell?

1. 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. noun.