Great Plains of North America - a vast prairie region extending from Alberta and Saskatchewan and Manitoba in Canada south through the west central United States into Texas; formerly inhabited by Native Americansdust bowl - a region subject to dust storms; especially the central region of United States subject to dust storms in the 1930s Llano Estacado - a large semiarid plateau forming the southern part of the Great Plains North America - a continent (the third largest) in the western hemisphere connected to South America by the Isthmus of Panama |