/ˈfrʌntɪə/ – noun
Definition: 1. biên giới;
2. vùng biên giới.
A more thorough explanation: In legal terms, a “frontier” refers to a boundary or border that separates two regions or territories. It can also refer to an area that is undeveloped or sparsely populated, often located at the edge of settled lands. The term “frontier” can have different legal implications depending on the context in which it is used, such as in international law, property law, or environmental law.
Example: The company is expanding its operations to new frontiers in international markets.