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.
Between 1860 and 1900, life expectancy increased by 13.7 percent. John C. Goodman, Forbes.com, 29 July 2025 When Social Security was created in 1935, life expectancy was around 63 years, meaning some workers never lived long enough to collect benefits. Aliss Higham, MSNBC Newsweek, 27 July 2025 According to a 2022 review, life expectancy is typically two to five years after a diagnosis of ATTR-CM.7 Historically, treatment for ATTR-CM had only been focused on relieving symptoms, not actually treating the disease. Patty Weasler, Verywell Health, 23 July 2025 Americans die younger than their peers in other rich countries, and U.S. life expectancy has decreased, especially among the poor. Nathan Meyers, The Conversation, 11 July 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 5 Aug. 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
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!