1. An area of land that marks the boundary or limit between two territories, regions, or opposing forces, often established by agreement or military convention
The demarcation zone between the two countries was heavily guarded by military personnel.
A zona de demarcação entre os dois países era fortemente vigiada por pessoal militar.
2. A buffer area or neutral territory that separates conflicting parties or administrative regions
The United Nations established a demarcation zone to separate the warring factions.
As Nações Unidas estabeleceram uma zona de demarcação para separar as facções em guerra.