the act of extinguishing.

the fact or condition of being extinguished or extinct.

suppression; abolition; annihilation

the extinction of an army.

Biology . the act or process of becoming extinct; a coming to an end or dying out

the extinction of a species.

Psychology . the reduction or loss of a conditioned response as a result of the absence or withdrawal of reinforcement.

Astronomy . the diminution in the intensity of starlight caused by absorption as it passes through the earth's atmosphere or through interstellar dust.

Crystallography, Optics . the darkness that results from rotation of a thin section to an angle (extinction angle) at which plane-polarized light is absorbed by the polarizer.

noun

annihilation , death , destruction , elimination , end of life , no life , obsolescence , thing of the past , eradication , extermination , extinguishment , extirpation , liquidation , obliteration , decease , demise , dissolution , passing , quietus , rest