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longevity (n.)

1610s, from Late Latin longaevitatem (nominative longaevitas) "great age, long life," from Latin longaevus "of great age, ancient, aged," from longus "long" (see long (adj.)) + aevum "lifetime, age" (from PIE root *aiw- "vital force, life; long life, eternity").

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Definitions of longevity

longevity (n.)
duration of service;
her longevity as a star
had unusual longevity in the company
Synonyms: length of service
longevity (n.)
the property of being long-lived;
Synonyms: seniority
From wordnet.princeton.edu