the length of time that a person is expected to live, depending on where they live, their job, sex etc. Insurance companies use this information to calculate the cost of insuring someone's life, and therefore the amount that people have to pay for that insurance; = LIFE EXPECTANCY
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expectation of life UK US noun [U]
► LIFE EXPECTANCY(Cf. ↑life expectancy)
Financial and business terms. 2012.