Adjective obsolete has 2 senses
  1. obsolete, outdated, out-of-date, superannuated - old; no longer in use or valid or fashionable; "obsolete words"; "an obsolete locomotive"; "outdated equipment"; "superannuated laws"; "out-of-date ideas"
    Antonym: current (indirect, via noncurrent)
  2. disused, obsolete - no longer in use; "obsolete words"
    Antonym: current (indirect, via noncurrent)
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