/ lɒnˈdʒevəti; NAmE lɑːn-; lɔːn-/ noun
[ U ] ( formal ) long life; the fact of lasting a long time :
We wish you both health and longevity.
He prides himself on the longevity of the company.
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WORD ORIGIN
early 17th cent.: from late Latin longaevitas , from Latin longus long + aevum age.