EAU
n. uncountable C1 Advanced US //ˈoʊ// UK //ˈəʊ// eau
n. Stands for Economic and Monetary Union. It is the group of countries that use the euro as their official money. It is a part of the European Union where people share the same currency and central bank.
n. Abbreviation for Economic and Monetary Union. The economic and monetary union of European Union member states that have adopted the euro as their common currency and sole legal tender. Managed by the European Central Bank, it involves coordinated fiscal and monetary policies among its members.
Usage
Usually takes the definite article 'the'. When referring to the geographic or economic area, it is almost always treated as a singular proper noun.