Definition of "has-been"

When the aforesaid alderman or another wishes to express mild contemptuosity for his fellows and himself in future I would suggest “old fossils” or “old has beens,” or “old fogies,” then the Sir Galahads that are always riding—or driving—about in this progressive dorp will not have any cause to complain.

1927 November 25, J. Jingle, “Merely My Musings”, in The Dabbo Liberal and Macquarie Advocate, page 2, column 3

I think Apple Computer is a has-been.

1986 (Jan 6), John Gantz, "Things Look Better in the Long View", InfoWorld, 7 (52) / 8 (1), page 19

Is it better to never be than to be and eventually become a has-been?

2009, William Shatner, Up Till Now: The Autobiography, page 338