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 site on Broadway at 165th St. is now the Shabazz Center, where Malcolm X’s 100th birthday will be celebrated on May 19.
—
Richard Johnson, New York Daily News, 11 May 2025
In previous years, Amazon Prime Day has taken place on or around the company’s birthday on July 16.
—Clara McMahon, People.com, 11 May 2025
On Bob's birthday each year — the anniversary of his mother's death — the family reads these tributes in her memory.
—Maquita Peters, NPR, 11 May 2025
The whisky brand sent a special delivery of its fiery whisky and merch straight to her doorstep to help her ring in her birthday.
—Jeanette Hurt, Forbes.com, 10 May 2025
See All Example Sentences for birthday
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Richard Johnson, New York Daily News, 11 May 2025
In previous years, Amazon Prime Day has taken place on or around the company’s birthday on July 16.
—Clara McMahon, People.com, 11 May 2025
On Bob's birthday each year — the anniversary of his mother's death — the family reads these tributes in her memory.
—Maquita Peters, NPR, 11 May 2025
The whisky brand sent a special delivery of its fiery whisky and merch straight to her doorstep to help her ring in her birthday.
—Jeanette Hurt, Forbes.com, 10 May 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 18 May. 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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