interjection, noun, plural good·bys.
Examples from the Web for goodby
Jamie Barrett, Partner, Goodby Silverstein & Partners, SF The Democratic Party.
That was Oliver's hard task now, to say goodby to all, hardest of all to those of his father's house.The Story of a Life|J. Breckenridge Ellis
Goodby, I know the way to our new home perfectly and will have no difficulty in reaching there alone.The Camp Fire Girls in Glorious France|Margaret Vandercook
I told her that I would not bid her goodby; I should find a moment to come back the next morning.Four Meetings|Henry James