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
In 2023, Wendy Williams was diagnosed with frontotemporal lobe dementia and other neurological issues, but was let out of the facility to go to her father’s birthday celebrations last February.
—
Madeleine Marr, Miami Herald, 17 Feb. 2026
The Flower Shop opened March 1, my birthday is March 1, my wife was born March 6, and my brother was March 7.
—Eddie Huang, Curbed, 17 Feb. 2026
The group performed at birthday parties, graduations, bar mitzvahs, and synagogues.
—Literary Hub, 17 Feb. 2026
Because the Jewish calendar and the Gregorian calendar don’t coincide, every year my birthday fell on a different day.
—Judith Levy, Sun Sentinel, 17 Feb. 2026
See All Example Sentences for birthday
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Madeleine Marr, Miami Herald, 17 Feb. 2026
The Flower Shop opened March 1, my birthday is March 1, my wife was born March 6, and my brother was March 7.
—Eddie Huang, Curbed, 17 Feb. 2026
The group performed at birthday parties, graduations, bar mitzvahs, and synagogues.
—Literary Hub, 17 Feb. 2026
Because the Jewish calendar and the Gregorian calendar don’t coincide, every year my birthday fell on a different day.
—Judith Levy, Sun Sentinel, 17 Feb. 2026
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 Feb. 2026.
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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