1. Extinguished, no longer alight (of fire, candles etc.)
    Poor Edward's cigarillo was already extinct.
  2. No longer used; obsolete, discontinued.
    Luckily, such ideas about race are extinct in current sociological theory.
  3. No longer in existence; having died out.
    The dinosaurs have been extinct for millions of years.
  4. No longer actively erupting.
    Most of the volcanos on this island are now extinct.

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