extermination extermination /ɪkˌstɝːməˈneɪʃən/

noun

1. The act of exterminating  ( extermination , liquidation )
   the act of exterminating
   
2. 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