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English definition of “life expectancy”

life expectancy

noun [C or U]    
(also expectation of life) the length of time that a person is likely to live: Life expectancy is the major factor influencing senior life insurance premiums.
the length of time that something such as an electrical product is likely to last: As technology becomes more sophisticated, the life expectancy of household gadgets seems to diminish.
(Definition of life expectancy noun from the Cambridge Business English Dictionary © Cambridge University Press)
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