4. The definition of bistro is a small Parisian-style restaurant that serves simple meals, wine and coffee in a casual, modest setting. A little cafe with three or four tables that serves casseroles and wine is an example of a bistro. noun. A small European-style restaurant.
Bistro food is French home cooking at its best—simple but satisfying dishes, presented without fanfare or flourish, often lovingly prepared personally by the proprietor.