Fed in WordNet English dictionary

1. the central bank of the United States; incorporates 12 Federal Reserve branch banks and all national banks and state-chartered 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"
   Federal Reserve System  Federal Reserve  Fed  FRS 
   
2. any federal law-enforcement officer
   Federal  Fed  federal official 
   

Fed in English Wiktionary