A hamburger is a sandwich consisting of a cooked meat patty on a bun or roll. You can order a hamburger, fries, and a shake at most fast food restaurants.
Hamburgers are traditionally made with ground beef and served with onions, tomatoes, lettuce, ketchup, and other garnishes. You can also make a hamburger with turkey or other kinds of meat — although rarely, if ever, is ham used in a hamburger. Hamburgers were originally called "hamburg steak," named for the German city of Hamburg, although no actual connection between the place and the food has ever been documented.