n. 前沿;边界;国境
adj. 边界的;开拓的
n. (Frontier)人名;(法)弗龙捷
frontier 拓荒者,边远地区居民
来自front,前面的,原义为前线部队,边疆。后用于美国西部大开发时期拓荒者,边远居民。
What is the frontier? ... In the census reports it is treated as the margin of that settlement which has a density of two or more to the square mile. [F.J. Turner, "The Frontier in American History," 1920]