al Dictionaries] 
n., The expectation of the lifespan of a person, culture, and so on. [Sciences] 
n., The persistence of an individual for longer than most members of its species, or of a genus or species ov
er a prolonged period
of geological time.
[Sciences] 
n., The length of time for which a given information medium remains fit for use under normal conditions, before deterior
ation
and other factors render it unusable. Longevity is affected by inherent vice, preservation procedures (cleaning, storag
e
