The lifespan of a product, organization, or idea is the period of time for which it is expected to work properly or to last. Most boilers have a lifespan of 15 to 20 years. the average length of time that someone will live or that something will continue to work lifetime
The lifespan of a person, animal, or plant is the period of time for which they live or are normally expected to live. A 15-year lifespan is not uncommon for a dog