A meatball is ground meat (mince) rolled into a ball, sometimes along with other ingredients, such as bread crumbs, minced onion, eggs, butter, and seasoning. Meatballs are cooked by frying, baking, steaming, or braising in sauce. There are many types of meatballs using different types of meats and spices. The term is sometimes extended to meatless versions based on vegetables or fish; the latter are also commonly known as fish balls.

Ground meat, called mince or minced meat outside North America, is meat finely chopped by a meat grinder or a chopping knife. A common type of ground meat is ground beef, but many other types of meats are prepared in a similar fashion, including pork, veal, lamb, goat meat, and poultry.