A patty, in American, Canadian, South African, Australian and New Zealand English, is a flattened, usually round, serving of ground meat or meat alternatives. The meat is compacted and shaped, cooked, and served. Patties can be eaten with a knife and a fork in dishes like Salisbury steak, but are typically served in a sort of sandwich called a "burger", or a hamburger if the patty is made from ground beef. The patty itself can also be called a burger, whether or not it is served in a sandwich, especially in the United Kingdom and Ireland, where the term "patty" is rarely used.
Similar-shaped meat cakes not made from ground beef may also be called "burger": "turkey burgers" or "fishburgers" may be made from reshaped mechanically separated meat. Sometimes burgers are breaded. Veggie burger patties are made without meat, often of soy, but also of other mixed vegetables (beans being one popular non-soy base).
In Ireland, traditional chippers often serve batter burger (a beef-based patty dipped in batter and deep fried) or spice burger (a savory patty made with a proprietary recipe of meats and spices). These are served in a greaseproof paper bag and eaten with the hands.
In India, a patty may refer to either a vegetarian (potato for example) or non-vegetarian (chicken, meat etc.) burger filling, or to a sweet or savory puff pastry turnover which is a common street food in many parts of the country.