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life expectancy   

Anh-Việt Anh-Anh
  • noun
    plural ~ -cies
    the average number of years that a person or animal can expect to live [noncount]
    improvements in diet that have resulted in greater life expectancy for many people [count]
    calculating the life expectancies of different social groups - often used figuratively
    What is the life expectancy of a new computer? [=how long can a new computer be expected to last or be useful?]