EXTINCTION

Definition

1. noun no longer active.
2. noun no longer in existence. — synonyms: defunctness
3. noun the reduction of the intensity of radiation as a consequence of absorption and radiation.
4. noun complete annihilation. — synonyms: extermination
5. noun a conditioning process in which the reinforcer is removed and a conditioned response becomes independent of the conditioned stimulus. — synonyms: experimental_extinction
6. noun the act of extinguishing. — synonyms: extinguishing, quenching