Birthday Definition

bûrthdā
noun
The day of one's birth.
American Heritage
The day of a person's birth or a thing's beginning.
Webster's New World
The anniversary of one's birth.
American Heritage
The anniversary of this day.
Webster's New World
Your birthday is defined as the day on which you are born, or the annual anniversary of that day.
If you were born on July 1, then July 1 is an example of your birthday.
YourDictionary
Synonyms:
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Other Word Forms of Birthday

Noun

Singular:
birthday
Plural:
birthdays

Idioms, Phrasal Verbs Related to Birthday

  • in one's birthday suit
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