Definition of "lifespan"

Last spring, the periodical cicadas emerged across eastern North America. Their vast numbers and short above-ground life spans inspired awe and irritation in humans—and made for good meals for birds and small mammals.

2012 March-April, Anna Lena Phillips, “Sneaky Silk Moths”, in American Scientist‎, volume 100, number 2, page 172

Asari Cultural VI: Due to our lifespan-sometimes reaching 1,000 years of age-we are patient in our decisions, and prefer long-term solutions over short-term gains.

2017, BioWare, Mass Effect: Andromeda, Redwood City: Electronic Arts, PC, scene: Nexus

The virtual enterprise forum developed several "classical" management functions for which resources were available throughout its lifespan.

2002, Luis M Camarinha-Matos, Collaborative business ecosystems and virtual enterprises