Definition of longevity
1a
: a long duration of individual life
The members of that family are noted for their longevity.
b
: length of life
a study of longevity
2
: long continuance : permanence, durability
longevity in office is also an asset— Spencer Parratt
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Merriam-Webster unabridged
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Time Traveler for longevity
The first known use of longevity was in 1569
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