1. (n.) The act of extinguishing or making extinct; a putting an end to; the act of putting out or destroying light, fire, life, activity, influence, etc.

2. (n.) State of being extinguished or of ceasing to be; destruction; suppression; as, the extinction of life, of a family, of a quarrel, of claim.

abolishment abolition abscission amputation annihilation annulment bane biological death blackout blocking burning out burnout cessation of life choking choking off clinical death controlling crossing the bar curtains damping death death knell debt of nature decease dematerialization demise departure deracination destruction disappearance disappearing dispersion dissipation dissolution dissolving doom dousing dying ebb of life eclipse elimination end end of life ending eradication erasure eternal rest evanescence evaporation excision exclusion exit expiration extermination extinguishment extirpation fadeaway fadeout fading final summons finger of death fire fighting flame-out going going off going out grave hand of death jaws of death knell last debt last muster last rest last roundup last sleep leaving life liquidation loss of life making an end melting mutilation negation nullification occultation parting passing passing away passing over perishing purge putting out quenching quietus release rescission rest reward rooting out sentence of death shades of death shadow of death silencing sleep smotheration smothering snuffing snuffing out somatic death stifling strangulation suffocation summons of death suppression uprooting vanishing vanishing point voiding wipe