a large US company (the Kellogg Company) that sells its many breakfast cereals (= grains processed as food) around the world. They include Kellogg's Corn Flakes, Rice Krispies, Special K and Crunchy Nut. Other Kellogg's products include Pop-Tarts and, in the US, Eggo. The company was started in 1906 by Will Keith Kellogg (1860-1951) in Battle Creek, Michigan.