extinct

Adjective

• being out or having grown cold
  • threw his extinct cigarette into the stream
    
  • the fire is out
    

• (of e.g. volcanos) permanently inactive
  • an extinct volcano
    

• no longer in existence; lost or especially having died out leaving no living representatives
  • an extinct species of fish
    
  • an extinct royal family
    
  • extinct laws and customs
    

Related words

• Synonyms: 
  out(p) , nonextant
• Antonyms: 
  active , extant