Wheat is a grass widely cultivated for its seed, a cereal grain that is a worldwide staple food. Wheat, any of several species of cereal grasses and their edible grains. Wheat is one of the oldest and most important of the cereal crops. Of the thousands of varieties known, the most important are common wheat are used to make bread, Durum wheat used in making pasta such as spaghetti and macaroni; and club wheat a softer type used for cake, crackers, cookies, pastries, and flours. Additionally, some wheat is used by industry for the production of starch, paste, malt, dextrose, gluten, alcohol, and other products.