1 [count] : a plant (such as a grass) that produces grain that can be eaten
▪ Wheat and barley are common cereals.2 : a breakfast food made from grain ◊Cereal is usually eaten in a bowl with milk poured over it. [noncount] ▪ a bowl of cereal ▪ Some kinds of cereal have a lot of added sugar. [count] ▪ Some cereals have a lot of added sugar. ▪ breakfast cereals
▪ Wheat and barley are common cereals.