länˈjevəd.ē, lȯn-, -ətē, -i noun
( -es )
Etymology: Late Latin longaevitas, from Latin longaevus long-lived (from longus long + aevum age, lifetime) + -itas -ity — more at long , aye
1.
a. : a long duration of individual life
his longevity was remarkable, considering the fact that he had been sickly as a child
longevity of metal parts is increased by this new process — Report: General Motors Corp.
b. : length of life
studies in longevity
2. : long continuance : seniority
longevity in office is also an asset — Spencer Parratt
held a remarkable record for parliamentary longevity — Time