extinction extinction /ɪkˈstɪŋʃən/

noun

1. The act of extinguishing; causing to stop burning  ( extinction , extinguishing , quenching )
   the act of extinguishing; causing to stop burning
    The extinction of the lights
   the extinction of the lights
   
   
2. A conditioning process in which the reinforcer is removed and a conditioned response becomes independent of the conditioned stimulus  ( experimental extinction , extinction )
   a conditioning process in which the reinforcer is removed and a conditioned response becomes independent of the conditioned stimulus
   
3. Complete annihilation  ( extermination , extinction )
   complete annihilation
    They think a meteor cause the extinction of the dinosaurs
   they think a meteor cause the extinction of the dinosaurs
   
4. The reduction of the intensity of radiation as a consequence of absorption and radiation  ( extinction )
   the reduction of the intensity of radiation as a consequence of absorption and radiation
   
5. No longer in existence  ( defunctness , extinction )
   no longer in existence
    The extinction of a species
   the extinction of a species
   
   
6. No longer active; extinguished  ( extinction )
   no longer active; extinguished
    The extinction of the volcano
   the extinction of the volcano