life expectancy

noun

: the average lifespan of an individual

Examples of life expectancy in a Sentence

improvements in diet that have resulted in greater life expectancy for many people

calculating the life expectancies of different social groups

Recent Examples on the Web

The pros and cons of longevity calculators For older Americans who might be underestimating their longevity, a life expectancy calculator can provide an instructive lesson. — Daniel De Visé, USA Today, 8 Aug. 2026

Clinicians weigh a patient’s age, PSA level, overall prostate cancer risk, life expectancy and general health when setting a schedule, according to a summary of the recommendations. — Hanna Wickes, Charlotte Observer, 7 Aug. 2026

Studies have linked regular bean consumption with a lower risk of chronic diseases, including heart disease, type 2 diabetes and obesity, which may contribute to a longer life expectancy. — Teresa Mull, FOXNews.com, 6 Aug. 2026

The average life expectancy for an individual diagnosed with the disease is seven to 13 years after symptoms begin. — Sofia Williams, Sacbee.com, 4 Aug. 2026

Word History

First Known Use

1848, in the meaning defined above

Kids Definition

life expectancy

noun

: the number of years that an individual or group of a certain age can expect to live on the average based on experience in the past for individuals or groups of the same kind

Medical Definition

life expectancy

noun

: an expected number of years of life based on statistical probability

Legal Definition

life expectancy

noun

: the average life span of an individual