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.
An experimental drug called daraxonrasib was also found to double patients’ life expectancy in a later-stage trial. Aria Bendix, NBC news, 2 May 2026 Because women statistically have longer life expectancies, insurers anticipate making payments over a longer period for female annuitants and adjust the monthly amount downward accordingly. Angelica Leicht, CBS News, 1 May 2026 If left untreated, bulldogs and similar breeds can struggle with physical activity, experience sleep disruptions, and have a shorter life expectancy. Taneia Surles, USA Today, 1 May 2026 Those roads have a surface life expectancy of around 20 to 25 years. R. Christian Smith, Chicago Tribune, 1 May 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 5 May. 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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