Definition of Political Geography

 A branch of geography that deals with human governments, the boundaries and subdivisions of political units (as nations or states), and the situations of cities. merriam-webster

According to Vladimir Kolossov,

"Political geography is an academic discipline studying the interaction between political activity of people and integral geographical space, which includes physical, economic, social, cultural, and political spaces."

According to Oxford Dictionary of Geography,

"Political geography is the geographical analysis of political studies which concerns with spatial expression of political ideas, the consequences of decision-making by political entity, and with those geographical factors that influence political activities or political problems".

So, Political geography is concerned with the study of both the spatially uneven outcomes of political processes and the ways in which political processes are themselves affected by spatial structures. Conventionally, for the purposes of analysis, political geography adopts a three-scale structure with the study of the state at the centre, the study of international relations (or geopolitics) above it, and the study of localities below it. The primary concerns of the subdiscipline can be summarized as the inter-relationships between people, state, and territory.