birthday

noun

birth·​day ˈbərth-ˌdā How to pronounce birthday (audio)
1
a
: the day of a person's birth
b
: a day of origin
2
: an anniversary of a birth
her 21st birthday

Examples of birthday in a Sentence

Her birthday is September 30th. Today is his 21st birthday. The company just celebrated its 50th birthday.
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.
All of his minimal birthday cheer was swept away after the fire. Pj Green, Kansas City Star, 23 Jan. 2025 The actress is the cover star of AARP The Magazine's February/March 2025 issue, reflecting on her upcoming milestone birthday, her career and personal life. Benjamin Vanhoose, People.com, 23 Jan. 2025 Just for Kids Weekend and Elmo’s birthday festivities are included with regular SeaWorld Orlando admission. Dewayne Bevil, Orlando Sentinel, 23 Jan. 2025 Ferrer additionally noted that the Fund hosted a charitable event for Ivanka’s stepsister, Tiffany, on her first birthday. Stephanie Giang-Paunon, Fox News, 23 Jan. 2025 See all Example Sentences for birthday 

Word History

First Known Use

14th century, in the meaning defined at sense 2

Time Traveler
The first known use of birthday was in the 14th century

Dictionary Entries Near birthday

Cite this Entry

“Birthday.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/birthday. Accessed 1 Feb. 2025.

Kids Definition

birthday

noun
birth·​day ˈbərth-ˌdā How to pronounce birthday (audio)
1
: the day or anniversary of one's birth
2
: the day or anniversary of a beginning

More from Merriam-Webster on birthday

Last Updated: - Updated example sentences
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