nacho

A small, often triangular piece of tortilla topped with cheese or chili-pepper sauce and broiled.

[American Spanish, possibly diminutive of the name Ignacio or alteration of ñato, pug-nosed, ugly, poor (alteration of Spanish chato, flat, snub-nosed, from Vulgar Latin *plattus, flat; see plate).]

[NAH-choh] A crisp tortilla chip topped with melted cheese (usually cheddar) and chopped chiles, usually served as an appetizer or snack. Nachos sometimes appear on menus as "Mexican pizza," in which case they generally have additional toppings such as cooked, ground chorizo, onions and sometimes olives.

The noun has one meaning:

Meaning #1: a tortilla chip topped with cheese and chili-pepper and broiled