The Oat is a species of cereal grain, and the seeds of this plant. They are used for food for people and as fodder for animals, especially poultry and horses. Oat straw is used as animal bedding and sometimes as animal feed.

Oats are often served as a porridge made from rolled or crushed oats, oatmeal, and are also baked into cookies together with wheat flour. As oat flour or oatmeal, they are also used in a variety of other baked goods and cold cereals, and as an ingredient in muesli and granola.