a flat, open-faced baked pie of Italian origin, consisting of a thin layer of bread dough topped with spiced tomato sauce and cheese, often garnished with anchovies, sausage slices, mushrooms, etc.

Is a pizza called a pie?

The term pie is still in use commonly with the older generations. Many Americans will use pie as slang for pizza. It is almost normal to hear someone order a pie and get a pizza, especially in New York City. Many people use the word pie when referring to the whole pizza instead of only a slice.

Is pizza a sandwich or a pie?

When we say that a sandwich must include a bread base, we mean specifically that it cannot be a pastry. The nature and constitution of the base dough is the point of demarcation. Pizza dough is a type of bread dough, therefore pizza is technically an open-faced sandwich and not an open-faced savoury pie.