1. A geographic region or territory where member states have eliminated tariffs and trade barriers among themselves while maintaining a common external tariff for trade with non-member countries
The European Union functions as a customs union area, allowing free movement of goods between member states.
A União Europeia funciona como uma área de união aduaneira, permitindo a livre circulação de mercadorias entre os estados membros.
2. An economic bloc characterized by unified customs regulations and trade policies
Mercosur operates as a customs union area in South America.
O Mercosul funciona como uma área de união aduaneira na América do Sul.