A commercial city in western Germany, in Hesse; population 652,600 (est. 2006). The headquarters of the Bundesbank are located there. Full name Frankfurt am Main /am ˈmʌɪn/.
Definition of Frankfurt in US English:
Frankfurt
proper nounˈfraNGkfərtˈfræŋkfərt
A commercial city in western Germany, in the state of Hesse; population 652,600 (est. 2006). Full name Frankfurt am Main.