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Adjective: extinct  ik'stingkt or ek'stingkt
  1. No longer in existence; lost or especially having died out leaving no living representatives
    "an extinct species of fish"; "extinct laws and customs";
    - nonextant
     
  2. (of e.g. volcanos) permanently inactive
    "an extinct volcano"
     
  3. Not lit, or having grown cold
    "threw his extinct cigarette into the stream";
    - out

See also: dead, extinction, nonexistent

Antonym: active, extant

Encyclopedia: Extinct