/tærɪf ˈjuːnjən/ – Phrase
Definition: liên minh thuế quan.
A more throughout explanation: A tariff union is a form of economic integration between two or more countries where they agree to eliminate tariffs and other trade barriers on goods traded between them, while maintaining a common external tariff on goods imported from countries outside the union.
Example: The countries in the region formed a tariff union to promote economic cooperation and facilitate trade among member states.