means A round flatbread baked with toppings, classically tomato, cheese, and whatever else you can fit before the crust gives up.

from From the Italian word 'pizza,' attested in Italy as far back as the 10th century in the Naples region, where it named a flatbread long before tomatoes ever showed up. The deeper root is debated: some trace it to the Greek 'pitta' (flatbread, cousin of the modern pita), others to a Germanic word related to English 'bit' or 'bite,' or to Latin 'picea' (pitch-black, as in a scorched crust) or 'pinsa' (from 'pinsere,' to pound or flatten dough). No single thread has won, so the honest answer is that pizza's name is as layered as its toppings.