1. A border or boundary line that has been clearly established, marked, or officially recognized between two territories, regions, or countries
The two countries signed a treaty establishing a defined border between them.
Os dois países assinaram um tratado estabelecendo uma fronteira definida entre eles.
2. A clear and distinct demarcation line with no ambiguity regarding territorial limits
The map shows the defined border with precise geographical coordinates.
O mapa mostra a fronteira definida com coordenadas geográficas precisas.