Meaning of “extinct” in the English Dictionary

"extinct" in British English

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extinctadjective

uk /ɪkˈstɪŋkt/ us /ɪkˈstɪŋkt/

C1 not now existing:

There is concern that the giant panda will soon become extinct.
Many tribes became extinct when they came into contact with Western illnesses.
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 longer existing:

There is concern that the giant panda will soon become extinct.

An extinct volcano (= mountain made from burned materials) is one that is no longer active.

extinction
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)