extinction -- (no longer active; extinguished; "the extinction of the volcano")
extinction, defunctness -- (no longer in existence; "the extinction of a species")
extinction -- (the reduction of the intensity of radiation as a consequence of absorption and radiation)
extinction, extermination -- (complete annihilation; "they think a meteor cause the extinction of the dinosaurs")
extinction, experimental extinction -- (a conditioning process in which the reinforcer is removed and a conditioned response becomes independent of the conditioned stimulus)
extinction, extinguishing, quenching -- (the act of extinguishing; causing to stop burning; "the extinction of the lights")
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