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
There are people in this world who exchange birthday gifts with their manicurist, and then there are those who have spent many solitary hours mastering the art of the at-home manicure.
—
Sophia Panych, Allure, 16 Sep. 2025
What To Know The next round of payments comes on September 17 for individuals with birthdays falling between the 11th and 20th of any month.
—Aliss Higham, MSNBC Newsweek, 15 Sep. 2025
The loving caption gets even more interesting considering that Stokes’s birthday is September 16.
—Jason P. Frank, Vulture, 15 Sep. 2025
In the lead-up to Monday’s hearing – held three days before Martinez’s 68th birthday – defense lawyers filed motions arguing for leniency based partly on what a doctor said was a dangerous heart condition worsened by stress.
—Douglas Hanks, Miami Herald, 15 Sep. 2025
See All Example Sentences for birthday
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Sophia Panych, Allure, 16 Sep. 2025
What To Know The next round of payments comes on September 17 for individuals with birthdays falling between the 11th and 20th of any month.
—Aliss Higham, MSNBC Newsweek, 15 Sep. 2025
The loving caption gets even more interesting considering that Stokes’s birthday is September 16.
—Jason P. Frank, Vulture, 15 Sep. 2025
In the lead-up to Monday’s hearing – held three days before Martinez’s 68th birthday – defense lawyers filed motions arguing for leniency based partly on what a doctor said was a dangerous heart condition worsened by stress.
—Douglas Hanks, Miami Herald, 15 Sep. 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 Sep. 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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