Used Occasionally. sublimation is one of the 30000 most commonly used words in the Collins dictionary
monetary unit. one of the units of CURRENCY used in a country as the basis of payments and lending and borrowing transactions. The units of currency used in the UK, for example, are pounds and pence, while in the USA they are the dollar and cent.
A more general definition is that a currency is a system of money (monetary units) in common use, especially in a nation. Under this definition, US dollars, British pounds, Australian dollars, and European euros are examples of currency.