birthday

[ burth-dey ]

noun

1. the anniversary of a birth.
2. the day of a person's birth.
3. a day marking or commemorating the origin, founding, or beginning of something.
4. the festivities or celebration marking such a day or anniversary.

birthday

/ ˈbɜːθˌdeɪ /

noun

1. 1. an anniversary of the day of one's birth
   2. ( as modifier )

      birthday present

2. the day on which a person was born
3. any anniversary

Word History and Origins

Origin of birthday¹

Middle English word dating back to 1350–1400; birth, day

Example Sentences

Her works are filled with whimsy and joy, including a collection of platters and plates featuring inlaid porcelain flowers, vaguely defined creatures that hold birthday candles, penguin pitchers and buddhas.

From Los Angeles Times

So when I went to the show — on my 25th birthday I took myself on a date, solo — I knew all the music already, like the back of my hand.

From Los Angeles Times

Though she is a teenager now, Emma said "there are still difficult days like anniversaries or birthdays".

From BBC

“You’re kind of set up for life,” said Laferriere who, at three weeks past his 23rd birthday, is just beginning that life.

From Los Angeles Times

For her 40th birthday, about a month before their deaths, he gave her a gun, one of many in their home.

From New York Times