Definition of Extinction

Noun: extinction ik'stingk-shun or ek'stingk-shun

No longer active; extinguished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