birthday
noun
birth·day
ˈbərth-ˌdā 
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
About 10 to 15 people came outside, some of whom said there was a birthday party taking place in the home.
—
Paula Wethington, CBS News, 8 Dec. 2025
The wait was worth it, as the finished product was extremely moist and tender, with a texture that fell somewhere between a pound cake and typical birthday cake.
—Karla Walsh, Better Homes & Gardens, 8 Dec. 2025
Trump adds birthday as free park day while MLK and Juneteenth removals ignite backlash.
—FOXNews.com, 8 Dec. 2025
News of the upcoming book comes months before what would have been the actress's 100th birthday on June 1, 2026.
—Rachel Raposas, PEOPLE, 8 Dec. 2025
See All Example Sentences for birthday
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Paula Wethington, CBS News, 8 Dec. 2025
The wait was worth it, as the finished product was extremely moist and tender, with a texture that fell somewhere between a pound cake and typical birthday cake.
—Karla Walsh, Better Homes & Gardens, 8 Dec. 2025
Trump adds birthday as free park day while MLK and Juneteenth removals ignite backlash.
—FOXNews.com, 8 Dec. 2025
News of the upcoming book comes months before what would have been the actress's 100th birthday on June 1, 2026.
—Rachel Raposas, PEOPLE, 8 Dec. 2025
See All Example Sentences for birthday
Cite this Entry
“Birthday.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/birthday. Accessed 15 Dec. 2025.
Copy CitationKids Definition
birthday
noun
birth·day
ˈbərth-ˌdā
1
: the day or anniversary of one's birth
2
: the day or anniversary of a beginning
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