1[countable]one of various types of grass that produce grains that can be eaten or are used to make flour or bread. Wheat, barley and rye are all cerealscereal crops2[uncountable]the grain produced by cereal crops3[countable, uncountable]food made from the grain of cereals, often eaten for breakfast with milkbreakfast cerealsa bowl of cereal
ˈsɪəriəl
ˈsɪriəl