An industrial complex of cities on the Mississippi River that includes Davenport and Bettendorf in southeastern Iowa, and Moline and Rock Island in northwestern Illinois. A second Quad Cities complex, in northern Alabama on the Tennessee River, consists of the cities of Florence, Sheffield, Tuscumbia, and Muscle Shoals.
Definition of Quad Cities in US English:
Quad Cities
proper nounˌkwäd ˈsitēz
An industrial complex of cities on the Mississippi River that includes Davenport and Bettendorf in southeastern Iowa, and Moline and Rock Island in northwestern Illinois. A second Quad Cities complex, in northern Alabama on the Tennessee River, consists of the cities of Florence, Sheffield, Tuscumbia, and Muscle Shoals.