lifetime
Americannoun
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the time that the life of someone or something continues; the term of a life.
peace within our lifetime.
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Physics. mean life.
adjective
noun
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the length of time a person or animal is alive
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( as modifier )
a lifetime supply
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the length of time that something functions, is useful, etc
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physics the average time of existence of an unstable or reactive entity, such as a nucleus, excited state, elementary particle, etc; mean life
Etymology
Origin of lifetime
First recorded in 1175–1225, lifetime is from the Middle English word liftime. See life, time
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
Until now, Calvin Coolidge is the only other US president to have featured on a coin in his lifetime.
From BBC
The experts warned that dormant mould spores could reactivate when the overbudget and delayed facilities finally open, posing a health hazard for the lifetime of the buildings.
From BBC
Beaming as President Obama awarded her the Presidential Medal of Freedom in 2012 for a lifetime of good work that expanded beyond the United Farm Workers union she co-founded.
From Los Angeles Times
We already know that lifetime exposure to high LDL, or low-density lipoprotein, increases cardiovascular risk, and that getting care earlier can help prevent heart disease.
From MarketWatch
Mama and Tante Anna redoubled their cooking and sewing for the needy in the neighborhood, as though realizing how brief was anyone’s lifetime of service.
From Literature
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
