Definition of Fed funds in English:

Fed funds

noun

US
Finance
  • 1Surpluses of reserve deposits held in the Federal Reserve system, which can be traded between member banks; federal funds.

  • 2Attributive (also in singular) of or relating to the active trade in surpluses of federal funds, as "Fed funds rate", "Fed funds target", etc.

Origin

1960s; earliest use found in Barron's National Business & Finance Weekly.