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Definition of lifetime
1a : the duration of the existence of a living being (such as a person or an animal) or a thing (such as a star or a subatomic particle)b : life 12
2 : an amount accumulated or experienced in a lifetime a lifetime of regrets
From the M-W Editors
Examples of lifetime in a Sentence
a lifetime spent traveling the world
It would have taken me a lifetime to read all those books.
Childhood seems a lifetime ago now!
a chemical with a lifetime of only a few minutes
the lifetime of a planet
Recent Examples of lifetime from the Web
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Those benefits, under the Affordable Care Act, must be covered by insurers, with no lifetime or annual caps on what insurers chip in to cover a particular patient’s bills.
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That love, along with the experience of a lifetime, is something every contestant takes home.
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John Adams declared in one of his many letters to Abigail Adams, his wife and lifetime correspondent.
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And still later discovering that a cure was within reach in his lifetime — which could be long and healthy.
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The lessons your kids learn with a tool kit will last a lifetime.
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This guy is really special and a once-in-a-lifetime player.
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In an eye-opening study involving 12,529 Americans ages 6 to 85, researchers mapped how physical activity changes over a lifetime.
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All this means that scientists now reviewing the Montreal Protocol should consider expanding the agreement to also regulate substances like CH2Cl2 that have atmospheric lifetimes of less than 6 months, Schofield says.
These example sentences are selected automatically from various online news sources to reflect current usage of the word 'lifetime'. Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
First Known Use of lifetime
13th century
lifetime
Definition of lifetime
1 : lifelong
2 : of long duration or continuance lifetime legislation
3 : measured or achieved over the span of a career a baseball player's lifetime batting average
First Known Use of lifetime
1834
LIFETIME Defined for English Language Learners
lifetime
playDefinition of lifetime for English Language Learners
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: the time during which a person is alive
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: a very long time
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: the time during which something lasts or is useful
LIFETIME Defined for Kids
Learn More about lifetime
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See words that rhyme with lifetime Thesaurus: All synonyms and antonyms for lifetime Spanish Central: Translation of lifetime Nglish: Translation of lifetime for Spanish speakers Britannica English: Translation of lifetime for Arabic speakers
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