a thing of the past

thing of the past

1. Something that no longer exists. Those stores are a thing of the past—their parent company filed bankruptcy a few years ago.
2. By extension, something that is no longer popular or commonplace. I think everyone is glad that leisure suits are a thing of the past. In today's society, it certainly seems like manners are becoming a thing of the past.
See also: of, past, thing

a thing of the ˈpast

something that no longer happens or exists: Everybody sends emails these days. Letter-writing has become a thing of the past.
See also: of, past, thing
References in classic literature ?
For long ambition has been like an ancient memory to me, some glorious day recalled from my springtime, so much a thing of the past that I must make a railway journey to revisit it as to look upon the pleasant fields in which that scene was laid.
Whence it arises," he continued, "that when we see any person well dressed and making a figure with rich garments and retinue of servants, it seems to lead and impel us perforce to respect him, though memory may at the same moment recall to us some lowly condition in which we have seen him, but which, whether it may have been poverty or low birth, being now a thing of the past, has no existence; while the only thing that has any existence is what we see before us; and if this person whom fortune has raised from his original lowly state
It's the wrong time of the year to see Pajaro Valley," Benson said, when he again sat beside Saxon and Sargent's was a thing of the past.
Old anxiety-producing (to say the least) patterns are a thing of the past, and you're about to settle into a new-and-improved groove.