frontier

frontier

noun

Definition 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>

Synonyms border, borderland, march

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

Related Words boonies [slang], boondocks, country, countryside, sticks

Phrases (the) back of beyond