1. the action of fixing the boundary or limits of something
2. a dividing line or boundary between areas or concepts

Examples

• The treaty established clear demarcation of the disputed territory.
• There was a sharp demarcation between the wealthy and poor neighborhoods.
• The demarcation line separated the two military zones.
• Scientists studied the demarcation between different climate regions.
• The fence served as a physical demarcation of property boundaries.
• There is often no clear demarcation between work and personal life.
• The demarcation of responsibilities helped avoid confusion among team members.