# birthday

> English word · Noun · IPA /ˈbɜːθ.deɪ/ · frequency rank #1,783

## Definitions
1. The anniversary of the day on which someone is born.
2. The anniversary of the day on which something is created.
3. The date on which someone is born or something is created, more commonly called birthdate or date of birth.
4. A birthday party.

## Etymology
From Middle English birthdai, birtheday, from Old English ġebyrddæġ (“birthday”), influenced by Old Norse burðr, equivalent to birth + day. Compare Saterland Frisian Gebuursdai (“birthday”), Dutch geboortedag (“birthday”), Low German Geboortsdag (“birthday”), German Geburtstag (“birthday”), Norwegian bursdag, gebursdag (“birthday”). Eclipsed non-native Middle English nativitee (“birth, nativity, birthday”), from Old French nativité, nativited, from Latin nātīvitas.

## Common misspellings (13)
`bbirthday`, `birhtday`, `birrthday`, `birtdhay`, `birthady`, `birthdayy`, `birthdday`, `birthdya`, `birthhday`, `birtthday`, `bitrhday`, `brithday`, `ibrthday`

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/birthday