extinct extinct /ɪkˈstɪŋkt/

adjective

1. (of e.g. volcanoes) permanently inactive  ( extinct )
   (of e.g. volcanoes) permanently inactive
    An extinct volcano
   an extinct volcano
   
2. Being out or having grown cold  ( extinct , out )
   being out or having grown cold
    Threw his extinct cigarette into the stream
   threw his extinct cigarette into the stream
    The fire is out
   the fire is out
   
3. No longer in existence; lost or especially having died out leaving no living representatives  ( extinct , nonextant )
   no longer in existence; lost or especially having died out leaving no living representatives
    An extinct species of fish
   an extinct species of fish
    An extinct royal family
   an extinct royal family
    Extinct laws and customs
   extinct laws and customs