If you describe something as superannuated, you mean that it is old and no longer used for its original purpose. the superannuated idealism of the Sixties. old and no longer useful or no longer able to do things (past participle of superannuari , from annus )
old; no longer in use or valid or fashionable; "obsolete words"; "an obsolete locomotive"; "outdated equipment"; "superannuated laws"; "out-of-date ideas"