Physical boundaries are natural features like rivers, mountains, deserts, or oceans that separate one region from another. These geographic features act as barriers and help determine political borders between states.
Related terms
Natural boundary: A natural boundary is a type of physical boundary formed by natural features such as rivers or mountain ranges.
Geometric boundary: A geometric boundary is an artificial line drawn on a map with no regard for natural features.
Landlocked country: A landlocked country is surrounded by other countries with no access to the sea.