Economic Definition of U.S. Treasury Department. Defined.
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Term U.S. Treasury Department Definition: A cabinet level part of the U.S. Federal government responsible for assorted financial matters. While it was once heavily involved in what could be termed monetary policy, before the creation of the Federal Reserve System, it's primary money role in modern times is relegated to authorizing the minting of metal coins. Among its many varied and important functions are issuing U.S. Treasury securities to finance the federal deficit and maintaining the integrity of paper currency by tracking counterfeiters.