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English definition of “lifespan”


noun [C]     /ˈlaɪf.spæn/
C2 the length of time for which a person , animal , or thing exists : The average human lifespan in the developed countries has increased over the last hundred years . The project's lifespan is estimated at about five years .Life and living
(Definition of lifespan noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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