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English definition of “longevity”

longevity

noun [U]     /lɒnˈdʒev.ə.ti/ US  /lɑːnˈdʒev.ə.t̬i/ formal
C2 living for a long time: To what do you attribute your longevity?Life and living remaining popular or useful for a long time: For longevity in car design, you really need to keep it simple.Lasting for a long time
(Definition of longevity noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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