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.
In 2021, life expectancy fell to just under 76 1/2 years. CBS News, 29 Jan. 2026 Because of longer life expectancies, the onset of symptoms thankfully was not static at 35, but regardless of when people entered their midlife crisis, evidence of the phenomenon was observed around the world. Tristan Bove, Fortune, 29 Jan. 2026 But life expectancy has been slowly inching back up since the pandemic ended in 2023 and drug overdoses began falling. Rob Stein, NPR, 29 Jan. 2026 In parts of North Tulsa, home to Greenwood, the average life expectancy is approximately 10 years less than that of many parts of South Tulsa. Caleb Gayle, The Atlantic, 28 Jan. 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 4 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

Last Updated: - Updated example sentences
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