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.
Yet as the exhibition notes, life expectancies are now rising higher than any other time in history. Leah Dolan, CNN Money, 2 Apr. 2026 Most Hunter syndrome kids have the severe form of the disease, which has a life expectancy of between 10 and 20 years. Elizabeth Chuck, NBC news, 1 Apr. 2026 Comparative studies across countries have shown that high trust societies have longer life expectancies, lower rates of anxiety and depression, maintain stronger safety nets and health care systems which support population health. Dr. Howard A. Selinger, Hartford Courant, 31 Mar. 2026 Suze Orman, financial advisor, author, and podcast host, has also said Americans need to prioritize saving or investing at least 10% of their earnings each year—particularly given longer life expectancies and rising health care costs in retirement. Sydney Lake, Fortune, 31 Mar. 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 4 Apr. 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

More from Merriam-Webster on life expectancy

Love words? Need even more definitions?

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

More from Merriam-Webster