Cereal/ˈsɪriəl/ Definition 1 of 2Pro Tip 1/3Meal Timing Cereal is often associated with breakfast, but can be eaten anytime. She had cereal for dinner when she was too tired to cook. Pro Tip 2/3Preparation Variety Cereal can be eaten with milk, yogurt, or even dry as a snack. On the hike, they snacked on dry cereal. Pro Tip 3/3Sweetened or Plain Cereals come in sweetened varieties with sugar and fruits or plain. He prefers his cereal plain, without any added sugar.