lifetime

[ lahyf-tahym ]
See synonyms for lifetime on Thesaurus.com
noun
  1. the time that the life of someone or something continues; the term of a life: peace within our lifetime.

  2. Physics. mean life.

adjective
  1. for the duration of a person's life: He has a lifetime membership in the organization.

Origin of lifetime

1
First recorded in 1175–1225, lifetime is from the Middle English word liftime.See life, time

Words Nearby lifetime

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use lifetime in a sentence

British Dictionary definitions for lifetime

lifetime

/ (ˈlaɪfˌtaɪm) /


noun
    • the length of time a person or animal is alive

    • (as modifier): a lifetime supply

  1. the length of time that something functions, is useful, etc

  1. physics the average time of existence of an unstable or reactive entity, such as a nucleus, excited state, elementary particle, etc; mean life

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012