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.
The capybara surpassed the typical 10- to 12-year life expectancy for the species in human care. Beth Reese Cravey, Florida Times-Union, 26 Mar. 2026 Low average life expectancy was a reflection of the fact that about half of all babies died before the age of five. Literary Hub, 25 Mar. 2026 At 35 years old (past the average life expectancy in Russia at the time), Ivanov has become a stranger in his own life. Sara Holdren, Vulture, 23 Mar. 2026 The gibbon had lived 14 years above the average life expectancy of his species, according to the post. Veronica Fernandez-Alvarado, Sacbee.com, 23 Mar. 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 29 Mar. 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

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