birth date

noun

variants or less commonly birthdate
plural birth dates also birthdates
: the calendar date on which someone or something was born : date of birth
There's even some question about his birth date—one source says 1854, another says 1856.Eugene Robinson
Of course, the registered horse has a recorded birth date, but many horses are not so fortunate.R. B. Warren
(figurative) Modern British drama does, however, have a precise and undisputed birthdate: May 8, 1956. It is opening night at the fledgling Royal Court …Timothy Mason

Examples of birth date in a Sentence

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.
Social Security numbers and birth dates stay the same for life. Kurt Knutsson, FOXNews.com, 20 Dec. 2025 State leaders say they are legally obligated to conceal documents with personally identifiable information such as voters’ names, birth dates, addresses and driver’s license numbers or partial Social Security numbers. Ashleigh Fields, The Hill, 13 Dec. 2025 Visitors using the online system are currently asked for information such as their passport and birth date, as well as any past criminal record. Lauren Chadwick, CNN Money, 10 Dec. 2025 Enter the promo code NEWSWEEK alongside basic personal information, like your name, birth date, mailing address and more. Tyler Everett, MSNBC Newsweek, 9 Dec. 2025 See All Example Sentences for birth date

Word History

First Known Use

1831, in the meaning defined above

Time Traveler
The first known use of birth date was in 1831

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Cite this Entry

“Birth date.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/birth%20date. Accessed 28 Dec. 2025.

Last Updated: - Updated example sentences
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