Birthday

/ˈbɜrθ.deɪ/

Meaning & Definition

noun
The anniversary of the day on which a person was born.
We are planning a big party for her birthday next week.
A day that celebrates someone's birth.
He received many gifts on his 10th birthday.
The date on which someone was born.
My sister's birthday is in December.
The occasion marking the anniversary of a birth.
They always celebrate his birthday with a family dinner.
A day of special importance in someone's life.
Her 21st birthday was a significant milestone.

Etymology

Old English 'byrð' meaning 'birth' and 'dæg' meaning 'day'.

Common Phrases and Expressions

birthday suit
Refers to being naked.
sweet sixteen
A celebration of a girl's 16th birthday.
birthday bash
A large or extravagant birthday party.

Related Words

celebrate
To acknowledge a notable occasion with festivities.
gift
An item given to someone without expectation of payment.

Slang Meanings

B-Day
Let’s plan something fun for your B-Day!
Cake day
It’s my cake day tomorrow!