A restaurant prepares and serves food and drink to customers. Meals are generally served and eaten on premises, but many restaurants also offer take-out and food delivery services. Restaurants vary greatly in appearance and offerings, including a wide variety of cuisines and service models.

restaurant owner is called a restaurateur; both words derive from the French verb restaurer, meaning "to restore". Professional artisans of cooking are called chefs, while prep staff and line cooks prepare food items in a more systematic and less artistic fashion.Restaurants range from unpretentious lunching or dining places catering to people working nearby, with simple food served in simple settings at low prices, to expensive establishments serving refined food and wines in a formal setting. In the former case, customers usually wear casual clothing. In the latter case, depending on culture and local traditions, customers might wear semi-casual, semi-formal, or even in rare cases formal wear.

Typically, customers sit at tables, their orders are taken by a waiter, who brings the food when it is ready, and the customers pay the bill before leaving. In finer restaurants there will be a host or hostess or even a maître d'hôtel to welcome customers and to seat them. Other staff waiting on customers include busboys and sommeliers.