interj. & adv. [ OE. also adew, adewe, adue, F. &unr_; dieu, fr. L. ad to + deus God. ] Good-by; farewell; an expression of kind wishes at parting. [ 1913 Webster ]
n.; pl. Adieus A farewell; commendation to the care of God at parting. Shak. [ 1913 Webster ]