The definition for "frontier" is as follows: frontier is receding to either (1) a line or border separating two countries or (2) a district near such a line.
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The 1890 census reported that the frontier line no longer existed, as the American frontier had been effectively settled. This marked a significant moment in US history as it showed the closing of the frontier and the end of an era of westward expansion.
what is the name of the line of fortification built along france's north eastern frontier between 1920 and1936
The Siegfried Line was a series of defenses on Germany's western frontier. The Lindberg Line was, of course, PanAm..
the frontier. this meant that there was no longer a frontier line. Aka: every where in the USA was discovered.
Star Trek
production possibilities frontier
No.
A straight line is a linear shape with no curves or angles, while a frontier generally refers to a boundary or border between two regions or domains. In economics or finance, a straight line frontier may represent a simplistic model of efficient investment portfolios, whereas a frontier in geography may denote a physical boundary between countries or areas.
It closed off the frontier to colonial expansion
Border, boundary of frontier.