The dividing line between two drainage basins is called a watershed or drainage divide. It refers to the elevated area of land that separates adjacent drainage areas, directing the flow of water into different rivers or basins. Watersheds play a crucial role in hydrology and can vary in size from small hills to large mountain ranges.
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It is called a border.
The dividing line between the two countries was established along the border defined by the historical treaties and agreements that marked their territories. This line often reflects geographical features such as rivers or mountain ranges, as well as political considerations. In some cases, it has been a source of tension or conflict, leading to disputes over the exact demarcation. The specifics of the dividing line can vary significantly depending on the countries in question.
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A boundary line is the dividing line between parcels of real property. It is sometimes a line that is surveyed according to the property's legal description, and sometimes the result of adverse possession (see link below).
A dividing line between two places is usually called a border.
A dividing line between two places is usually called a border.
Continental Divide is the drainage that divides sea or ocean. The Great Divide or the Continental Divide of the Americas is the division of the Pacific Ocean watersheds from the Atlantic and Arctic.
The equator is the dividing line between the northern and southern hemispheres. It is an imaginary line that circles the Earth halfway between the North and South Poles.
There is also a view as EurAsia is one continent and there is no dividing line between the two. In contrast if we look, the Ural Mountains in Russia could be a dividing line between Europe and Asia.
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eurasia
The Equator.
It is called a border.
The geographical dividing line between the Tidewater and the Piedmont in Virginia is the Fall Line