hamburger

A hamburger is a sandwich made with a ground beef patty, usually served on a bun with various toppings. Think lettuce, tomato, cheese, and sauce.

When people say they want to go for a burger or order a hamburger, they're usually talking about going to a restaurant that serves this specific type of food. You might see "hamburger" on the menu, but more likely you'll just see "burger." If someone orders a cheeseburger, it means they want their patty topped with melted cheese. A quarter pounder is another common term for a burger made from a certain amount of ground beef (in this case, a quarter of a pound). Some people also use the word hamburger to refer to a specific type of restaurant that only serves burgers and sometimes other American-style foods like fries and milkshakes.