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 average life expectancy for someone with ALS is two to five years, Verywell Health explains, as the person eventually becomes fully paralyzed and unable to breathe without the aid of a ventilator. Cara Lynn Shultz, People.com, 21 Feb. 2025 The average life expectancy has increased more than 15 years since the 1970s, while the infant mortality rate was below 0.5 percent in 2023, down from 30 percent in the 1950s. Claire Fu, New York Times, 20 Feb. 2025 In 1900, the average life expectancy in Indiana was just 47 years. Jessica Cantlon, Chicago Tribune, 15 Feb. 2025 The average life expectancy for men in the U.S. is 74.8 years. Taylor Johnston, CBS News, 14 Feb. 2025 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

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Cite this Entry

“Life expectancy.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/life%20expectancy. Accessed 3 Mar. 2025.

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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