| Birthday 1. (n.) The day in which any person is born; day of origin or commencement. 2. (n.) The day of the month in which a person was born, in whatever succeeding year it may recur; the anniversary of one's birth. 3. (a.) of or pertaining to the day of birth, or its anniversary; as, birthday gifts or festivities. Thesaurus Entries anniversary, annual holiday, bicentenary, bicentennial, biennial, bissextile day, centenary, centennial, commemoration, decennial, diamond jubilee, golden wedding anniversary, holy days, immovable feast, jubilee, leap year, name day, natal day, octennial, quadrennial, quasquicentennial, quincentenary, quincentennial, quinquennial, septennial, sesquicentennial, sextennial, silver wedding anniversary, tercentenary, tercentennial, tricennial, triennial, wedding anniversary |