frontier
frontier
nounDefinition of FRONTIER
1
a region along the dividing line between two countries <the Apaches were once feared on both sides of the U.S.-Mexico frontier>
Related Words no-man's-land
2
a rural region that forms the edge of the settled or developed part of a country <Alaska has been called America's last frontier>
Synonyms backcountry, backland(s), backwater, backwoods, bush, hinterland, outback, outlands, up-country
Phrases (the) back of beyond
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