Meaning of EXTINCTION in English

ikˈstiŋ(k)shən, ek- noun

( -s )

Etymology: Middle English extinccioun, from Latin exstinction-, exstinctio, extinction-, extinctio, from exstinctus, extinctus + -ion-, -io -ion


a. : the act of making extinct or causing to be extinguished : quenching, suppression , extermination , destruction , annihilation

the extinction of all life in the region

: cancellation , abolition

extinction of a debt

b. : the condition or fact of being extinct or extinguished : the process of becoming extinct or extinguished

extinction of a species


a. : a progressive decrease in the intensity of radiation (as of the light of the sun) by absorption and scattering in the medium (as the atmosphere) traversed

b. : the condition of a crystal of appearing dark when viewed in polarized light with crossed nicols

3. : elimination of a conditioned response by not reinforcing the response

Webster's New International English Dictionary.      Новый международный словарь английского языка Webster.