A ragout is a savory dish with chunks of meat and vegetables cooked together into a stew. An authentic ragout is cooked very slowly at a low heat.
A ragout is essentially the same as a stew, except that most recipes for ragout are originally French, and often the meat and vegetables are cut into smaller pieces than in a typical stew. Ragouts vary in flavor and ingredients — you can skip the meat and make a vegetarian ragout, for example. In French, it's ragoût, from the Middle French ragoûter, "awaken the appetite," which has the root goût, or "taste."