📖 WordNook

extinction

noun
  1. the act of extinguishing
    extinguishingquenching
  2. a conditioning process in which the reinforcer is removed and a conditioned response becomes independent of the conditioned stimulus
    experimental extinction
  3. complete annihilation
    “they think a meteor cause the extinction of the dinosaurs”
    extermination
  4. the reduction of the intensity of radiation as a consequence of absorption and radiation
  5. no longer in existence
    “the extinction of a species”
    extinctnonextantdefunctness
  6. no longer active