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 state also ranks third for life expectancy and third for overall happiness. Kristine Hansen, Travel + Leisure, 4 June 2026 The 10-year gap in disease-free life expectancy between people practicing four to five habits at 50 and those practicing none is built from modifiable behaviors, not a lifetime of perfect choices. Allison Palmer june 3, Kansas City Star, 3 June 2026 The Harvard data show that obesity combined with heavy smoking produces the lowest disease-free life expectancy at 50. Allison Palmer, Charlotte Observer, 3 June 2026 On the waitlist alone, the average wait time can exceed a patient’s average life expectancy. Randy Simpkins, Boston Herald, 2 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 7 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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