the Federal Reserve SystemˌFederal Reˈserve ˌSystem, the (also the Fed infml)
the national banking system in the US, according to which the Federal Reserve Bank operates
From Longman Business Dictionary
Federal Reserve SystemˌFederal Reˈserve ˌSystemabbreviation FRS nounORGANIZATIONSBANKING
the US CENTRAL BANK. It consists of the 12 Federal Reserve Banks and sets banking rules, controls the MONEY SUPPLY, (=the amount of money in the economy) and manages the CLEARING SYSTEM (=the system for making payments between banks)
The Federal Reserve System has committed itself to fighting the recession with lower interest rates.