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
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Fink, 73, has long warned about America’s retirement crisis, with one of his other main arguments being the security system will fail because life expectancy is rising. Sydney Lake, Fortune, 17 Feb. 2026 Before Social Security, more than three-quarters of men over age 65 were working, in large part because just 5% of workers had a pension, despite life expectancy being just 61 years. Kathryn Anne Edwards, Twin Cities, 17 Feb. 2026 The measure of a community’s health is found in its life expectancy. Chicago Tribune, 15 Feb. 2026 The factors that drove it have mostly played out, including Congress raising the Social Security eligibility age by two years, gains in education and life expectancy and fewer employee pensions, said Alicia Munnell, a senior adviser to the Center for Retirement Research at Boston College. Paige Winfield Cunningham The Washington Post, Arkansas Online, 9 Feb. 2026 See All Example Sentences for life expectancy

Word History

First Known Use

1848, in the meaning defined above

Time Traveler
The first known use of life expectancy was in 1848

Browse Nearby Words

Cite this Entry

“Life expectancy.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/life%20expectancy. Accessed 24 Feb. 2026.

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

More from Merriam-Webster on life expectancy

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