Life expectancy, the length of time a person is alive

Object lifetime, in object-oriented programming, the time between an object's creation until the object is no longer used

Lifetime (band), an American melodic hardcore punk band from New Jersey

Service life, a product's expected lifetime, or the acceptable period of use in service

The Tony Williams Lifetime, a pioneering jazz fusion group led by drummer Tony Williams

Mean lifetime, a certain number that characterizes the rate of reduction ("decay") of a particle of an assembly

Life Time, an album by Rollins Band

"A Lifetime," a song by Better Than Ezra

Lifetime Television, a cable television network; see also, Lifetime Entertainment Services, Lifetime Movie Network, and Lifetime Real Women