- birthday
- birth|dayW3S2 [ˈbə:θdeı US ˈbə:r-] n1.) your birthday is a day that is an exact number of years after the day you were born▪ He was in Kansas to celebrate his 74th birthday .happy birthday!(=what you say on someone's birthday)birthday card/gift/party etc▪ Are you going to Anne's birthday party?the birthday girl/boy informal (=the person whose birthday it is)2.) a day that is an exact number of years since an organization was established or an event first happened▪ The City of Cleveland Orchestra is celebrating its 200th birthday .3.) in your birthday suit informalnot wearing any clothes - used humorously
Dictionary of contemporary English. 2013.