Lifetime can refer to:

• Life expectancy, the length of time a person is alive
• One of the American media ventures owned by Lifetime Entertainment Services
  • Lifetime Television, a cable television network
  • Lifetime Movie Network, a cable movie network
  • Lifetime Real Women, a cable television network
• Lifetime (band), an American melodic hardcore punk band from New Jersey
• 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

Lebensdauer | Durée de vie