FRS rare noun 1. the central bank of the United States; incorporates 12 Federal Reserve branch banks and all national banks and state charted commercial banks and some trust companies “the Fed seeks to control the United States economy by raising and lowering short-term interest rates and the money supply” SynonymsFederal Reserve SystemFederal ReserveFed Related words Broader terms central bank Part of Federal Reserve Banknational bankmember bank WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.