A baked pie of Italian origin consisting of a shallow breadlike crust covered with toppings such as seasoned tomato sauce, cheese, or sausage.
A baked Italian dish consisting of flattened bread dough covered variously with herbs, fresh vegetables, or, typically in the U.S., with tomato sauce, grated cheese, and, often, sausage, mushrooms, pepperoni, etc.
Pizza is an Italian food that generally includes bread dough, herbs, tomato sauce and mozzarella cheese.
An example of pizza is a food on which many people place pepperoni.
He ate a whole pizza!
Should we cook a frozen pizza for dinner?
Origin of pizza
 Borrowing from Italian Italian pizza, of uncertain origin, perhaps from Byzantine Greek Ï€Î¯Ï„Ï„Î± (pitta, “cake, pie"), from Ancient Greek Ï€Î¯ÏƒÏƒÎ± (pissa, “pitch"), Attic Ï€Î¯Ï„Ï„Î± (pitta), from Ï€ÎµÏ€Ï„ÏŒÏ‚ (peptos, “cooked") or from Langobardic pizza ("bit, bite"), or from Latin pinso (“I beat, pound").