EUROPEAN SYSTEM OF CENTRAL BANKS: The consolidation of the central banks of the member nations of the European Union, together with the European Central Bank, to oversee monetary policy. A major aspect of the Economic and Monetary Union has been coordinate the actions of distinct, independent nations under a single authority, which could probably not be achieved without the European System of Central Banks. The European System of Central Banks is comparable to the Federal Reserve System of the United States. See also | European Union | Economic and Monetary Union | euro | Maastricht Treaty | monetary policy | Euro zone | Federal Reserve System | European Commission |