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.
Five years after the beginning of the COVID-19 pandemic, the average life expectancies in the U.S. have decreased. Julia Craven, Popular Science, 30 Jan. 2025 Black women's average life expectancy stood at nearly age 77 in 2018, and Black men until almost 70. Maya Goldman, Axios, 28 Jan. 2025 Our life expectancy at birth is 77.5 years, almost five years shorter than the average life expectancy in other high-income countries. Barbara A. Perry, Newsweek, 27 Jan. 2025 Known as the most toxic place on Earth due to a copper smelting plant, here the average life expectancy is 38 and cancer affects the population disproportionally. Carlos Aguilar, Variety, 25 Jan. 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

Dictionary Entries Near life expectancy

Cite this Entry

“Life expectancy.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/life%20expectancy. Accessed 2 Feb. 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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