Main Entry: lon·gev·i·ty

Pronunciation: \län-ˈje-və-tē, lȯn-\

Function: noun

Etymology: Late Latin longaevitas, from Latin longaevus long-lived, from longus long + aevum age — more at aye

Date: 1615

1 a : a long duration of individual life b : length of life <a study of longevity>
2 : long continuance : permanence, durability