megapolitan
n.β Β«Suddenly we donβt have two cities in two states, separated by geography and a weak transportation link, U.S. Highway 71, that is commercially discouraging. Instead, we have the start of a functioning megapolitan corridor that creates synergy and multiplies options.Β» ββSteadily worming to a better way” by Les Minor Texarkana Gazette (Texas) Aug. 21, 2005. (source: Double-Tongued Dictionary)