pie/paI; paI/n [C,U]1 a) fruit baked inside PASTRY 水果馅饼: an apple pie 苹果馅饼 b) BrE meat, fish, or vegetables baked inside PASTRY or with potato on top【英】肉馅饼﹔鱼馅饼﹔蔬菜馅饼: chicken and mushroom pie 鸡肉蘑菇馅饼2 pie in the skyinformal something that someone says will happen but which you think is very unlikely【非正式】空中楼阁﹐不大可能实现的事MINCE PIE