1. | [c] 国界;边界;边境a line that separates two countries, etc.; the land near this line |
the frontier between the land of the Saxons and that of the Danes 撒克逊人土地和古斯堪的纳维亚人土地的边界 | |
a customs post on the frontier with Italy 与意大利交界的边境上的海关关卡 | |
a frontier town/zone/post 边陲小镇;边疆地带;边防站 |
2. | [sing] (尤指 19 世纪美国西部的)开发地区边缘地带,边远地区the edge of land where people live and have built towns, beyond which the country is wild and unknown, especially in the western US in the 19th century |
a remote frontier settlement 边远地区定居点 |
3. | [c][usupl] ~ (of sth) (学科或活动的)尖端,边缘the limit of sth, especially the limit of what is known about a particular subject or activity |
to push back the frontiers of science(= to increase knowledge of science) 开拓科学新领域 | |
to roll back the frontiers of government(= to limit the powers of the government) 限制政府权力 |