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.
For reference, the average life expectancy in the U.S. is 74.8 years for males and 80.2 years for females based on latest data from the CDC National Center for Health Statistics. True Tamplin, Forbes.com, 4 June 2025 In 1900, the average life expectancy of a 1-year-old in the U.S. was about 56 years; that bespeaks a morbid population of infants. Michael Hiltzik, Los Angeles Times, 3 June 2025 Hawaii has the lowest percentage of seniors over 65 years old living alone, the highest average life expectancy and the highest senior state of happiness. Angelica Stabile, FOXNews.com, 30 May 2025 If it were increased and then indexed to life expectancy (and the normal retirement age was as well), and depending on the details, then the long term-shortfall would be reduced by anywhere between 14% and 50%. Allison Schrager, Boston Herald, 25 May 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 18 Jun. 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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