1. No longer in use
   "obsolete words";
   - disused
    
2. No longer current or applicable
   "obsolete regulations from the previous century";
   - outdated, out-of-date, superannuated, old

1. Cause to become obsolete
   "New technology quickly obsoleted the old manufacturing processes"

Derived forms: obsoleted, obsoletes, obsoleting

See also: noncurrent

Encyclopedia: Obsolete