Lewis Short
aevÄtas (noun F) : aevum (an old word, = aetas, which is contr. from it)
* The time through which a person lives or a thing lasts, the time of existence.
* Lit.: qua voluptate aevitatis extimam attigit metam aevitas, Varr. ap. Non. p. 193, 7: censores populi aevitates, suboles, familias pecuniasque censento,Cic. Leg. 3, 7: SI MORBVS AEVITASVE VITIVM ESCIT, Leg. XII. Tab. ap. Gell. 20, 1, 25; Arn. 5, 8.
* Trop.
* Of the future, time unending, immortality: sed etiam mortales deos ad aevitatem temporis edidit,for endless ages, to endure forever,App. Dogm. Plat. 1, 120.
* Of the past: quid operis aut negotii celebrans anteacti temporis decurrerit aevitatem,the time of yore,Arn. 2, 22.
Charlton T. Lewis, Charles Short, A Latin Dictionary