Supranational

What Does Supranational Mean?
An international organization, or union, whereby member states transcend national boundaries
or interests to share in the decision-making and vote on issues pertaining to the wider grouping.

Investopedia explains Supranational
The European Union and the World Trade Organization are both supranationals. In the EU, each member votes on policy that will affect each member nation. The benefits of this construct for the EU are the synergies derived from social and economic policies along with a stronger presence on the international stage.