A more thorough explanation:

Definition: A demarcation line is a temporary border that separates territories under different jurisdictions. It is usually established when a final boundary arrangement is not possible due to political situations.

Example: During the Korean War, a demarcation line was established between North and South Korea to separate the two territories. This line, also known as the 38th parallel, was a provisional border that separated the communist North from the democratic South.

Explanation: The example illustrates how a demarcation line is used to separate territories under different jurisdictions. In this case, the line was established to separate North and South Korea, which had different political systems. The demarcation line was a temporary solution until a final boundary arrangement could be made.