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WordReference Random House Learner's Dictionary of American English © 2024life•time /ˈlaɪfˌtaɪm/USA pronunciation n. [countable]- the amount of time that a person stays alive or that something continues;
the term of a life:hoped to see peace within our lifetime. - a very long time:We waited a lifetime for the doctor's report.
adj. [before a noun] - for the length of a person's life:a lifetime membership.
Idioms- of a lifetime, [after a noun] most memorable:the vacation of a lifetime.
WordReference Random House Unabridged Dictionary of American English © 2024life•time (līf′tīm′),USA pronunciation n. - the time that the life of someone or something continues;
the term of a life:peace within our lifetime. - PhysicsSee mean life.
adj. - for the duration of a person's life:He has a lifetime membership in the organization.
- Middle English liftime. See life, time 1175–1225
Collins Concise English Dictionary © HarperCollins Publishers:: lifetime /ˈlaɪfˌtaɪm/ n - the length of time a person or animal is alive
- (as modifier): a lifetime supply
- the length of time that something functions, is useful, etc
- the average time of existence of an unstable or reactive entity, such as a nucleus, excited state, elementary particle, etc; mean life
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