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.
In fact, the average life expectancy of a new recruit is about 10 days to three weeks, and once on the battlefield, their survival averages just 20-35 minutes, according to Russian military bloggers. Jason Ma, Fortune, 27 June 2026 The report draws on state-level estimates of life expectancy at age 65 (16 to 20 years, more or less, depending on the state), average retirement benefits, median net worth and expected retirement expenses. Daniel De Visé, USA Today, 26 June 2026 Indiana ranks worse in education, household income and life expectancy. Chicago Tribune, 25 June 2026 Today, longer life expectancy means more individuals are reaching ages associated with dementia. Lauren Pastrana, CBS News, 24 June 2026 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 30 Jun. 2026.

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

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