Our adieux were limited to a hasty bow, and then I pushed forward, trusting to my own resources; for the porter’s lodge is untenanted as yet.
With Mr. Heathcliff, grim and saturnine, on the one hand, and Hareton, absolutely dumb, on the other, I made a somewhat cheerless meal, and bade adieu early.
She wrote to inform her brother of the probable conclusion of a four-months’ indisposition under which she had suffered, and entreated him to come to her, if possible; for she had much to settle, and she wished to bid him adieu, and deliver Linton safely into his hands.
I held no communication with him: still, I was conscious of his design to enter, if he could; and on the Tuesday, a little after dark, when my master, from sheer fatigue, had been compelled to retire a couple of hours, I went and opened one of the windows; moved by his perseverance to give him a chance of bestowing on the faded image of his idol one final adieu.
There are no more uses of "adieu" in the book.
Show samples from other sources
Only adieu, mon plaisir, may we meet again.
Fyodor Dostoyevsky -- Crime and Punishment
You can perhaps think it is a little thing, Stingo, but it is to permit someone to die without a farewell, an adieu, a single word of comfort or understanding that is so terrible to bear.