birth
day
Plural
birthdays
1
the day and month of your birth in every year
- He invited all his friends to his birthday party at the park.
- I planned a surprise party for my little sister's birthday.
- My favorite part of birthdays is opening presents.
- They decorated the room with balloons and streamers for the birthday party.
- Today is my birthday, and I'm celebrating with my family.
2
the date on which a person was born
Synonyms: