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
Kings 7-foot-1 rookie Maxime Raynaud had 17 points and eight rebounds playing on his 23rd birthday.
—
CBS News, 8 Apr. 2026
Hirsch will play Herman Zweig, a Holocaust survivor with an infectious zest for life and comes to Westside on the day of his 90th birthday for routine treatment… but when tragedy strikes and the hospital suddenly goes on lockdown, his optimism will be put to the test.
—Nellie Andreeva, Deadline, 7 Apr. 2026
Now with three locations (Wicker Park, Oak Park, Portage Park), Knecht and team regularly host a range of events and programs, from birthday parties and summer camps to weekend and afterschool classes.
—Nicole Schnitzler, Chicago Tribune, 7 Apr. 2026
While on the stand during the trial, Arielle Konig testified that the two had traveled to Oahu from their home in Maui to celebrate her birthday.
—Meredith Deliso, ABC News, 7 Apr. 2026
See All Example Sentences for birthday
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show current usage.
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CBS News, 8 Apr. 2026
Hirsch will play Herman Zweig, a Holocaust survivor with an infectious zest for life and comes to Westside on the day of his 90th birthday for routine treatment… but when tragedy strikes and the hospital suddenly goes on lockdown, his optimism will be put to the test.
—Nellie Andreeva, Deadline, 7 Apr. 2026
Now with three locations (Wicker Park, Oak Park, Portage Park), Knecht and team regularly host a range of events and programs, from birthday parties and summer camps to weekend and afterschool classes.
—Nicole Schnitzler, Chicago Tribune, 7 Apr. 2026
While on the stand during the trial, Arielle Konig testified that the two had traveled to Oahu from their home in Maui to celebrate her birthday.
—Meredith Deliso, ABC News, 7 Apr. 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 8 Apr. 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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