frontier
frontier: n.
1 a the border between two countries. b the district on each side of this.
2 the limits of attainment or knowledge in a subject.
3 US the borders between settled and unsettled country. frontierless adj. [ME f. AF frounter, OF frontiere ult. f. L frons frontis FRONT]
Most popular pairs with frontier
frontier airlines
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digimon frontier
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frontier league
star frontiers
2005 frontier
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