Extinction - Definition

n 1: no longer active; extinguished; "the extinction of the
volcano"
2: no longer in existence; "the extinction of a species" [syn:
extinction, defunctness]
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: extinction,
extermination]
5: a conditioning process in which the reinforcer is removed and
a conditioned response becomes independent of the conditioned
stimulus [syn: extinction, experimental extinction]
6: the act of extinguishing; causing to stop burning; "the
extinction of the lights" [syn: extinction,
extinguishing, quenching]