Wild West
- the western US in a time of lawlessness in its early history. The Wild West was the last of a succession of frontiers formed as settlers moved gradually further west. The frontier was officially declared closed in 1890.西大荒（指美国早期历史上无法纪时代的西部, 是拓荒者西进运动中形成的一系列边陲区域的最后一片土地; 边疆开拓于1890年正式宣布结束）。