extinction meaning and definition

EXTINCTION noun

Definition of extinction (noun)

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 no longer active; extinguished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