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
The latter marks the 186-year anniversary of Gardner’s birthday.
—
Rosemary Feitelberg, Footwear News, 20 Oct. 2025
While their murders remain unsolved, Zajko has been named a person of interest in the double homicide, which coincided with her 30th birthday.
—Mia Cathell, The Washington Examiner, 20 Oct. 2025
The man who Maryland police say drove into a child's birthday party, killing one person and injuring 13 others, has turned himself in, officials said.
—N'dea Yancey-Bragg, USA Today, 20 Oct. 2025
Another North Carolina lottery player claimed a record-breaking prize on her birthday, McClatchy News reported in 2024.
—Simone Jasper, Charlotte Observer, 20 Oct. 2025
See All Example Sentences for birthday
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Rosemary Feitelberg, Footwear News, 20 Oct. 2025
While their murders remain unsolved, Zajko has been named a person of interest in the double homicide, which coincided with her 30th birthday.
—Mia Cathell, The Washington Examiner, 20 Oct. 2025
The man who Maryland police say drove into a child's birthday party, killing one person and injuring 13 others, has turned himself in, officials said.
—N'dea Yancey-Bragg, USA Today, 20 Oct. 2025
Another North Carolina lottery player claimed a record-breaking prize on her birthday, McClatchy News reported in 2024.
—Simone Jasper, Charlotte Observer, 20 Oct. 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 23 Oct. 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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