USA HISTORY

Detailed explanation-1: -American frontier, in United States history, the advancing border that marked those lands that had been settled by Europeans.

Detailed explanation-2: -So, a frontier is an area that is ahead of a hinterland. It is an area towards which an ecumene (inhabited land) can expand. Generally, frontiers are not recognised as a legal or political concept. A boundary indicates the limits of a political spatial unit.

Detailed explanation-3: -The noun frontier has several meanings. It can refer to the wilderness at the edge of a settled area (picture covered wagons pushing westward) or it can mean a field of study that has not yet been explored (picture genetically engineering pet dinosaurs).

Detailed explanation-4: -Definitions of frontier. a wilderness at the edge of a settled area of a country. “the individualism of the frontier in Andrew Jackson’s day” type of: wild, wilderness. a wild and uninhabited area left in its natural condition.