ex·tinc·tion /ɪkˈstɪŋ(k)ʃən/ 名詞
1. 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. State of being extinguished or of ceasing to be; destruction; suppression; as, the extinction of life, of a family, of a quarrel, of claim.
n 1: no longer in existence; "the extinction of a species" [syn:
2: no longer active; extinguished; "the extinction of the
3: the reduction of the intensity of radiation as a consequence
of absorption and radiation
4: complete annihilation; "they think a meteor cause the
extinction of the dinosaurs" [syn: extermination]
5: a conditioning process in which the reinforcer is removed
and a conditioned response becomes independent of the
conditioned stimulus [syn: experimental extinction]
6: the act of extinguishing; causing to stop burning; "the
extinction of the lights" [syn: extinguishing, quenching]