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.
According to the Association of Zoos and Aquariums, male polar bears have a median life expectancy of nearly 21 years, but there's not enough data on female lifespans. Madeline Bartos, CBS News, 8 Dec. 2025 In 2016, two years after the diagnosis, Aguirre’s health took a turn for the worse and her life expectancy was shortened to one month. William Melhado, Sacbee.com, 5 Dec. 2025 Among men and women, there isn’t much of an age-gender gap until women reach their 50s, when their long life expectancies come into play. Scott Lafee, San Diego Union-Tribune, 2 Dec. 2025 The condition is life-threatening, with a typical life expectancy between 10 and 20 years. Mrigakshi Dixit, Interesting Engineering, 24 Nov. 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

Browse Nearby Words

Cite this Entry

“Life expectancy.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/life%20expectancy. Accessed 16 Dec. 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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