pie
Synonym discussion
Sense: noun/1
Pie is the broadest word in this group. It can be sweet or savory, and it usually has pastry below the filling, above it, or both. A tart is often shallower and is commonly open on top, especially when it is sweet. A quiche is a savory type with an egg mixture, so it fits only one narrow part of the meaning of pie. A turnover is folded shut and is usually small enough for one person. Use pie when the exact shape does not matter or when you mean the dish in general. You can say 'We shared an apple pie after dinner,' but 'She packed a cheese turnover for the train' and 'They served spinach quiche at lunch.'
Etymology
The food word pie has been in English since Middle English. Early uses referred to baked dishes with mixed fillings inside pastry. The deeper origin is uncertain, but some historians connect it with words linked to the magpie, a bird associated with collecting many different things, perhaps because older pies often contained many ingredients together.