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.

The EU, United Nations, and the World Trade Organization (WTO) are all supranational groups, to one degree or another. In the EU, each member votes on policies that will affect each other member nation.