|1.||[ noun ] (psychology,education) a learning process in which the reinforcer is removed and a conditioned response becomes independent of the conditioned stimulus|
|Related terms:||learning conditioning|
|2.||[ noun ] complete annihilation|
"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|
"the extinction of a species"
|5.||[ noun ] no longer active; extinguished|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|
"the extinction of the lights"
|Related terms:||termination snuff_out extinguish|