大庆dàqìng 1.大规模庆祝的事(多指国家大事{usu. referring to state affairs}){grand celebration of an important event; great occasion}: 十年～。{festive occasion of the 10th anniversary} 2.〈敬辞pol.〉称老年人的寿辰{birthday of an old person who commands respect}: 七十～。{70th birthday}