1. A geographical area located along or near an international border, often characterized by limited government control, sparse population, or strategic importance
The frontier zone between the two countries was heavily militarized.
A zona de fronteira entre os dois países era altamente militarizada.
2. An area of exploration, development, or innovation that represents new or uncharted territory
Artificial intelligence is considered a frontier zone in modern technology.
A inteligência artificial é considerada uma zona de fronteira na tecnologia moderna.