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as in border
a region along the dividing line between two countries the Apaches were once feared on both sides of the U.S.-Mexico frontier

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as in countryside
a rural region that forms the edge of the settled or developed part of a country Alaska has been called America's last frontier

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Cite this Entry

“Frontier.” Thesaurus, Merriam-Webster, Accessed 30 Nov. 2023.

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