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
This year his birthday coincides with National Toast Day, which is celebrated on the last Thursday in February.
—
Mary Divine, Twin Cities, 17 Feb. 2025
But Vera’s story, framed to negligible effect by her 50th birthday party (where she’s played by Susanne Wolff), is told almost like a teen-emancipation caper comedy about a plucky high school senior driven by her daddy issues to succeed.
—David Rooney, The Hollywood Reporter, 16 Feb. 2025
While the holiday is sometimes misunderstood as a celebration of the lives and birthdays of all U.S. presidents, the holiday was originally called Washington's Birthday and was the first federal holiday to honor an individual's birth date.
—Gabe Hauari, USA TODAY, 15 Feb. 2025
The Colombian singer-songwriter shared with his more than eight million followers on Instagram photos and videos of the birthday party, expressing his love for his mother.
—Griselda Flores, Billboard, 15 Feb. 2025
See all Example Sentences for birthday 
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Mary Divine, Twin Cities, 17 Feb. 2025
But Vera’s story, framed to negligible effect by her 50th birthday party (where she’s played by Susanne Wolff), is told almost like a teen-emancipation caper comedy about a plucky high school senior driven by her daddy issues to succeed.
—David Rooney, The Hollywood Reporter, 16 Feb. 2025
While the holiday is sometimes misunderstood as a celebration of the lives and birthdays of all U.S. presidents, the holiday was originally called Washington's Birthday and was the first federal holiday to honor an individual's birth date.
—Gabe Hauari, USA TODAY, 15 Feb. 2025
The Colombian singer-songwriter shared with his more than eight million followers on Instagram photos and videos of the birthday party, expressing his love for his mother.
—Griselda Flores, Billboard, 15 Feb. 2025
See all Example Sentences for birthday
Dictionary Entries Near birthday
Cite this Entry
“Birthday.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/birthday. Accessed 21 Feb. 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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