obsolete

/ˌäb-sə-ˈlēt/

Latin obsoletus, from past participle of obsolescere to grow old, become disused, perhaps from ob- toward + solēre to be accustomed

adjective

  1. no longer in use or no longer useful

  2. of a kind or style no longer current : old-fashioned

  3. indistinct or imperfect as compared with a corresponding part in related organisms : vestigial

an obsolete word

an obsolete technology

old ancient venerable antique antiquated archaic obsolete mean having come into existence or use in the more or less distant past. old may apply to either actual or merely relative length of existence. ancient applies to occurrence, existence, or use in or survival from the distant past.

verb

  1. to make (something) old-fashioned or no longer useful : make, obsolete