The Vietnamese word "biên phòng" refers to activities related to defending a country's borders. It is commonly used to describe the military or police forces responsible for border security. The term can also refer to specific locations where these forces operate, such as border posts or stations.
While "biên phòng" primarily refers to border defense, it can also encompass the broader idea of national sovereignty and territorial integrity in discussions about a country's policies and actions regarding its borders.