# birthday

Pronunciation: say "BURTH-day" US /ˈbɝθˌdeɪ/, UK /ˈbɜːθ.deɪ/

## Noun

1. The yearly anniversary of the day a person was born or something was founded, or the celebration held to mark it.
   - Simple: The day each year when someone was born or something began, or a party for that day.
   - _She invited twenty friends to celebrate her thirtieth birthday._
   - _On his birthday, the whole family gathered at the restaurant for dinner._
2. The calendar date on which a person was born or something was created, more commonly called a birthdate or date of birth.
   - Simple: The exact date when someone was born or something was made, also called a birthdate.
   - _The nurse recorded the baby's birthday in the hospital register._
   - _His official documents list a birthday in early March._

## Verb

3. To mark and celebrate the anniversary of one's own birth, usually with some kind of festivity. *(colloquial)*
   - Simple: To celebrate the day you were born, often with friends and a party.
   - _"So how are we birthdaying this year?" she asked, scrolling through cabin rentals with her best friend._
   - _He'd rather birthday quietly than throw a big bash._

## Origin

From Middle English birthdai, from Old English ġebyrddæġ ("birthday"), influenced by Old Norse burðr, and equivalent to birth + day. It won out over Middle English nativitee, which came from Old French nativité and ultimately Latin nātīvitas.

Source: DictionaryAI, https://dictionaryai.com/define/birthday (written from Wiktionary data, CC BY-SA 4.0: https://creativecommons.org/licenses/by-sa/4.0/).