Definition of "lifetime" []

  • The period of time during which an individual is alive. (noun)
  • The period of time during which property, an object, a process, or a phenomenon exists or functions. (noun)
  • Continuing for a lifetime; lifelong. (adjective)
  • Occurring or measured over a person's active career: a lifetime batting average. (adjective)
  • The length of time a person or animal is alive (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

  • (as modifier) (noun)
  • The length of time that something functions, is useful, etc (noun)
  • The average time of existence of an unstable or reactive entity, such as a nucleus, excited state, elementary particle, etc; mean life (noun) (c) HarperCollins Publishers Ltd 2016

Use "lifetime" in a sentence
  • "Lloyds said it has not used the term "lifetime" cover since 2007 - and that it was clearly explained in the policy documents, that pet insurance remained an annual insurance policy, and terms and conditions could be altered."
  • "Correction, Senator Bennett scored the 64 in 2008, his lifetime is about an 83, not bad."
  • "The study also provided an estimate of what it refers to as "lifetime incidence" — given the current abortion rate, the proportion of women estimated to have an abortion in their lifetime by age 45."