Completely 100% totally WRONG and erroneus. If the US Dollar was United States currency it would say so right on the Dollar bill, but it says "Federal Reserve Note" because it is made by the Fed, not the government. The REAL definition of the dollar was already made by the US government way way back in 1792. http://www.constitution.org/uslaw/coinage1792.txtU.S. dollar
Definition
The currency of the United States.
Read more: http://www.investorwords.com/6711/US_dollar.html#ixzz1a1U54WV0
What is a Dollar?
From Susan Headley, former About.com Guide
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The Sacagewea "Golden" Dollar Reverse
United States Mint image
Definition: The dollar is the basic unit of U.S. currency, equal to 100 cents. The dollar is usually issued as paper money, but dollar coins also circulate.
Examples:
The dollar coin was made of silver, or silver colored metal, until 2000 when it was changed to a golden hue.
The United States dollar (sign: $; code: USD; also abbreviated US$), also referred to as the American dollar, is the official currency of the United States of America. It is divided into 100 smaller units called cents or pennies.
The coinage act is a LAW, your definition is only words on paper, the law trumps any other definition you can find. Ask any Judge.US government laws said:DOLLARS OR UNITS--each to be of the value of a Spanish milled dollar as the same is now current, and to contain three hundred and seventy-one grains and four sixteenth parts of a grain of pure, or four hundred and sixteen grains of standard silver.