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  1. Oxford American Dictionary

    extinction

    • IPA[ikˈstiNG(k)SH(ə)n]

    美式

    • n.
      the fact or process of a species, family, or other group of animals or plants becoming extinct；the process of a particular thing ceasing to exist

    • noun: extinction, plural noun: extinctions

    • 釋義

    名詞

    • 1. the fact or process of a species, family, or other group of animals or plants becoming extinct preventing the extinction of this unique frog will require the restoration of ponds and surrounding habitats the extinction of the great auk
    • ▪ the process of a particular thing ceasing to exist he joined the chorus of those predicting the extinction of newsprint
    • ▪ the wiping out of a debt a private debt extinction fund
    • 2. reduction in the intensity of light or other radiation as it passes through a medium or object, due to absorption, reflection, and scattering ultraviolet extinction