Currency Basket

What Does Currency Basket Mean?
A selected group of currencies in which the weighted average is used as a measure of the value or the amount of an obligation. A currency basket functions as a benchmark for regional currency movements - its composition and weighting depends on its purpose.

Investopedia explains Currency Basket
A currency basket is commonly used in contracts as a way of avoiding (or minimizing) the risk of currency fluctuations. The European currency unit (which was replaced by the euro) and the Asian currency unit are examples of currency baskets.