Definition of birthday
1a : the day of a person's birthb : 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 of birthday from the Web
As India and Pakistan celebrate their twin 70th birthday this August, the frontier post of Wagah reflects the profound dysfunction in their relations.
CAVE CREEK, Ariz. (AP) — Maria Raya-Garcia almost didn’t get the weekend off to celebrate her birthday beside a popular swimming hole in Arizona.
The event drew thousands of people to Atchison over the weekend, just ahead of what would have been her 120th birthday, on July 24.
This year Chance the Rapper celebrated his birthday with a cake sculpted to look like buckets of Harold’s chicken, and Kanye West, Kendrick Lamar, and Lupe Fiasco have all name-checked Harold’s.
CLICK Olivia Munn knows how to do a birthday getaway right.
But that's now in doubt as the act just had its 100th birthday.
The event, which was themed '5021 Revolution,' celebrated not only Olympia's upcoming birthday, but also her father, the Crown Prince of Greece's, 50th.
Rob gives Chyna 28 bouquets of flower and 28 love notes for her 28th birthday.
These example sentences are selected automatically from various online news sources to reflect current usage of the word 'birthday.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
First Known Use of birthday
BIRTHDAY Defined for English Language Learners
Definition of birthday for English Language Learners
: the day when someone was born or the anniversary of that day
: the day when something began
BIRTHDAY Defined for Kids
Definition of birthday for Students
1 : the day or anniversary of someone's birth
2 : a day of beginning Our town just celebrated its 150th birthday.
Seen and Heard
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