lon·gev·i·ty (lŏn-jěv'ĭ-tē, lôn-) n.
pl.lon·gev·i·ties
Long life; great duration of life: His longevity vexed his heirs.
Length or duration of life: comparing the longevities of the two peoples.
Long duration or continuance, as in an occupation: had unusual longevity in the company; her longevity as a star.
[Late Latin longaevitās, from Latin longaevus, ancient : longus, long; see del-1 in Indo-European roots + aevum, age; see aiw- in Indo-European roots.] lon·ge'vous (-jē'vəs) adj.