English · Word Candidate

birthday

/ˈbɜːθ.deɪ/

Proposed by a contributor, not yet supported by evidence.

Also seen as: birthdays · birthdaying · birthdayed

Sense 1

Both English Tiếng Việt

Meaning · English

The anniversary of the day on which someone is born.

Nghĩa · Tiếng Việt

Ngày kỷ niệm sinh nhật của một người

Machine-translated — suggest a fix

Noun

When's your birthday? Mine's on April 1.

Usage example from English Wiktionary (CC BY-SA 4.0, retrieved 2026-08-01)

Sources & notes

Adapted from English Wiktionary (CC BY-SA 4.0, retrieved 2026-08-01 via kaikki.org).

Both English Tiếng Việt

Meaning · English

The anniversary of the day on which something is created.

Nghĩa · Tiếng Việt

Ngày kỷ niệm ngày tạo ra một thứ gì đó

Machine-translated — suggest a fix

Noun

Sources & notes

Adapted from English Wiktionary (CC BY-SA 4.0, retrieved 2026-08-01 via kaikki.org).

Both English Tiếng Việt

Meaning · English

To celebrate one's birthday.

Nghĩa · Tiếng Việt

Đánh dấu ngày sinh nhật của mình

Machine-translated — suggest a fix

VerbRegister: informal

Sources & notes

Adapted from English Wiktionary (CC BY-SA 4.0, retrieved 2026-08-01 via kaikki.org).

What does “birthday” mean?

The anniversary of the day on which someone is born.

Is “birthday” formal or informal?

No register label has been reviewed yet — treat it as neutral and check the usage notes above.

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