countable noun The euro is a unit of money that is used by the member countries of the European Union which have accepted European monetary union. It is represented by the symbol <>. A euro is divided into one hundred smaller units called cents. ⇒ Millions of words have been written about the introduction of the euro. ⇒ Governments and businesses will start keeping accounts in euros. The euro is also used to refer to this currency system. ⇒ Millions of words have been written about the introduction of the euro.
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