1. [ noun ] (psychology,education) a learning process in which the reinforcer is removed and a conditioned response becomes independent of the conditioned stimulus
Synonyms: experimental_extinction
Related terms: learning conditioning
2. [ noun ] complete annihilation
Synonyms: extermination

"they think a meteor cause the extinction of the dinosaurs"

Related terms: annihilation eliminate
3. [ noun ] (physics) the reduction of the intensity of radiation as a consequence of absorption and radiation
Related terms: natural_process absorption scattering absolute_zero
4. [ noun ] no longer in existence
Synonyms: defunctness

"the extinction of a species"

Related terms: death
5. [ noun ] no longer active; extinguished

"the extinction of the volcano"

Related terms: inaction extinct
6. [ noun ] the act of extinguishing; causing to stop burning
Synonyms: quenching extinguishing

"the extinction of the lights"

Related terms: termination snuff_out extinguish
Similar spelling:   extinct