A supranational organization is a multinational union or association in which member countries cede authority and sovereignty on at least some internal matters to the group, whose decisions are binding on its members. In short, member states share in decision making on matters that will affect each country's citizens.
A venture involving three or more nation-states involving formal political, economic, and/or cultural cooperation to promote shared objectives. The European Union is one such organization.
The Commission defines key legal aspects of the supranational system because its members must be independent of commercial, labour, consumer, political or lobby interests (Article 9 of the Paris Treaty).
Yes, the European Union (EU) is a supranational union because each member casts a vote on issues that impact the union's sovereignty. They also influence the way the association interacts with the market. It gives EU members a broader international presence as well as a more regulated and unified economic front.