Dictionary
birth•day
Pronunciation: (bûrth'dā"), [key]—
n.
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.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.