be a thing of the past

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be a thing of the past

To be outdated. These days, floppy disks are a thing of the past. I wonder when smartphones will be a thing of the past.
See also: of, past, thing

be a thing of the past

to be something that does not exist or happen any more When video recorders were introduced, people said that the cinema would be a thing of the past. Job security is a thing of the past.
See also: of, past, thing