bid adieu to (someone or something)
1. To say goodbye to someone or something. "Adieu" is a French valediction that literally means "to God." Because I had a train to catch, I had to bid adieu to them quite early in the evening, unfortunately. It was hard to bid adieu to college, but I knew deep down that it was time to move on.
2. To part with something, such as a possession. It's time for you to bid adieu to these ratty old t-shirts.
bid adieu to someone or something
Cliché to say good-bye to someone or something. (The word adieu is French for good-bye and should not be confused with ado.) Now it's time to bid adieu to all of you gathered here. He silently bid adieu to his favorite hat as the wind carried it down the street.