1. An area or zone that lies along or near a boundary line, border, or frontier between two distinct territories, regions, or systems
The boundary region between the two countries is heavily fortified.
A região de fronteira entre os dois países é fortemente fortificada.
2. In mathematics and physics, the perimeter or edge area of a defined space or domain
In calculus, we must carefully analyze the boundary region to solve this integral.
Em cálculo, devemos analisar cuidadosamente a região de fronteira para resolver essa integral.
3. A transitional zone with distinct characteristics different from the core areas on either side
The boundary region exhibits unique ecological features from both ecosystems.
A região de fronteira exibe características ecológicas únicas de ambos os ecossistemas.