Single Market: A single market refers to the free movement of goods, services, capital, and people within the EU without internal borders or barriers.
Euro: The Euro is the official currency used by 19 out of 27 EU member countries. It promotes economic integration among these countries.
Supranationalism: Supranationalism refers to decision-making powers that are given to institutions beyond national governments. In the EU context, it means that certain decisions are made collectively at the EU level rather than solely by individual member states.