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1. Dictionary

   Ex·tinc·tion

   /ikˈstiNG(k)SH(ə)n/

   

   noun

   • 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 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"

   Word Origin late Middle English: from Latin exstinctio(n-), from exstinguere ‘quench’ (see extinguish).

   Scrabble Points: 19

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2. www.vocabulary.com › dictionary › extinctionExtinction - Definition, Meaning & Synonyms | Vocabulary.com

   www.vocabulary.com › dictionary › extinction

   noun. no longer active; extinguished. “the extinction of the volcano” see more. noun. a conditioning process in which the reinforcer is removed and a conditioned response becomes independent of the conditioned stimulus. synonyms: experimental extinction. see more. noun.

3. www.britannica.com › dictionary › extinctionExtinction Definition & Meaning | Britannica Dictionary

   www.britannica.com › dictionary › extinction

   • Cached

   Britannica Dictionary definition of EXTINCTION. : the state or situation that results when something (such as a plant or animal species) has died out completely. [noncount] the extinction of all life in the region.

4. dictionary.cambridge.org › dictionary › learner-englishEXTINCTION | meaning - Cambridge Learner's Dictionary

   dictionary.cambridge.org › dictionary › learner-english

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   noun [ U ] uk / ɪkˈstɪŋkʃ ə n / us. Add to word list Add to word list. a situation in which a type of animal no longer exists: Many species of animal are threatened with extinction. (Definition of extinction from the Cambridge Learner's Dictionary © Cambridge University Press) Translations of extinction. in Chinese (Traditional) 滅絕, 絕種… See more.

5. www.bbc.com › news › science-environment-63875331Biodiversity: What is a mass extinction and are we causing one?

   www.bbc.com › news › science-environment-63875331

   Dec 9, 2022 · What is a mass extinction? Mass extinctions are episodes in Earth's history when the planet rapidly loses three quarters or more of its species. Scientists who study the fossil...

6. www.oxfordlearnersdictionaries.com › english › extinctionextinction noun - Definition, pictures, pronunciation and ...

   www.oxfordlearnersdictionaries.com › english › extinction

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   extinction. noun. /ɪkˈstɪŋkʃn/. /ɪkˈstɪŋkʃn/. [uncountable, countable] a situation in which a plant, an animal, a way of life, etc. stops existing. a tribe threatened with extinction/in danger of extinction. The island's way of life is doomed to extinction. The mountain gorilla is on the verge of extinction.

7. www.britannica.com › summary › extinction-biologyextinction (of species) summary | Britannica

   www.britannica.com › summary › extinction-biology

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   extinction (of species), Dying out or termination of a species. It occurs when a species can no longer reproduce at replacement levels. Most past extinctions are thought to have resulted from environmental changes that the doomed species was either unable to adapt to or that caused it to adapt so thoroughly that it became a distinctly new species.

8. dictionary.cambridge.org › learner-english › extinctionextinction definition | Cambridge Learner’s Dictionary

   dictionary.cambridge.org › learner-english › extinction

   • Cached

   noun [ U ] uk / ɪkˈstɪŋkʃ ə n / us. Add to word list. a situation in which a type of animal no longer exists: Many species of animal are threatened with extinction. (Definition of extinction from the Cambridge Learner's Dictionary © Cambridge University Press) Translations of extinction. in Chinese (Traditional) 滅絕, 絕種… See more.