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
My writing group forgot my birthday.
—
Literary Hub, 21 May 2026
Incredibly, modern denim jeans bear a great resemblance to the originals, whose birthday is May 20, 1873.
—Catherine Salfino, Footwear News, 20 May 2026
Most Treasured Views is a USA TODAY Network project exploring places across America with historical and cultural significance, created in celebration of the USA 250 initiative marking the nation’s 250th birthday.
—Victoria E. Freile, USA Today, 20 May 2026
Growing older may be inevitable, but paying full price on your birthday apparently isn’t.
—Evan Moore
may 20, Charlotte Observer, 20 May 2026
See All Example Sentences for birthday
Examples are automatically compiled from online sources to
show current usage.
Read More
Opinions expressed in the examples do not represent those of Merriam-Webster or its editors.
Send us feedback.
Literary Hub, 21 May 2026
Incredibly, modern denim jeans bear a great resemblance to the originals, whose birthday is May 20, 1873.
—Catherine Salfino, Footwear News, 20 May 2026
Most Treasured Views is a USA TODAY Network project exploring places across America with historical and cultural significance, created in celebration of the USA 250 initiative marking the nation’s 250th birthday.
—Victoria E. Freile, USA Today, 20 May 2026
Growing older may be inevitable, but paying full price on your birthday apparently isn’t.
—Evan Moore
may 20, Charlotte Observer, 20 May 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 23 May. 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
Love words? Need even more definitions?
Merriam-Webster unabridged
