extinct Meaning in the Cambridge English Dictionary
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Meaning of “extinct” in the English Dictionary

"extinct" in British English

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uk   us   /ɪkˈstɪŋkt/
C1 not now ​existing: There is ​concern that the ​giantpanda will ​soon become extinct. Many ​tribesbecame extinct when they came into ​contact with ​Westernillnesses. A lot of ​trades have ​become extinct because of the ​development of ​technology. An extinct ​volcano is one that is not now active (= will not ​explode again).
(Definition of extinct from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"extinct" in American English

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extinctadjective [not gradable]

 us   /ɪkˈstɪŋkt/
no ​longerexisting: There is ​concern that the ​giantpanda will ​soonbecome extinct. An extinct volcano (= ​mountain made from ​burnedmaterials) is one that is no ​longeractive.
noun [U]  us   /ɪkˈstɪŋk·ʃən/
Many ​species of ​plants and ​animals are threatened with extinction.
(Definition of extinct from the Cambridge Academic Content Dictionary © Cambridge University Press)
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