Synonyms of 'extinct'
(of an animal or plant species) having died outIt is 250 years since the wolf became extinct in Britain.
no longer in existence, esp. because of social changesHerbalism had become an all but extinct skill in the Western World.
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in the sense of defunct
no longer existing or working properlythe leader of the now defunct Social Democratic Party
in the sense of gone
no longer present or no longer in existenceThe paramedics tried to revive him, but it was too late - he was gone.
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Thesaurus for extinct from the Collins English Thesaurus