Definition of casseroles:
(n) :
Food, such as a stew, cooked in such a dish.
(n) :
(countable) A dish of glass or earthenware, with a lid, in which food is baked and sometimes served.
(n) :
(by extension) Any type of food that fills the high-walled dish or pan in which it was cooked.
(v) :
(transitive) To cook like, or as, a casserole; to stew.