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 life expectancy for Gary residents is about 10 years lower than that of residents in the wealthier community of Carmel, a statistic McCrady attributes to the pollution from the surrounding coal-burning mills. Karl Schneider, IndyStar, 15 Sep. 2025 Little more than a century later, life expectancy had dramatically increased to seventy nine years—all due to a better understanding of microscopic germs as the cause of infectious diseases, public health measures, and the discovery and application of antibiotics. Alan Lightman september 12, Literary Hub, 12 Sep. 2025 Pygmies are native to West Africa, and their average life expectancy is 27 years. Sarah Scanlan, USA Today, 12 Sep. 2025 The Chihuahua, meanwhile, has a life expectancy of between 14 and 16 years. Rachael O'Connor, MSNBC Newsweek, 10 Sep. 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 18 Sep. 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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