frontier

英 ['frʌntɪə; frʌn'tɪə] 美[frʌn'tɪr]

• n. 前沿；边界；国境
• adj. 边界的；开拓的
• n. (Frontier)人名；(法)弗龙捷

1. a wilderness at the edge of a settled area of a country;

"the individualism of the frontier in Andrew Jackson's day"

2. an international boundary or the area (often fortified) immediately inside the boundary

3. an undeveloped field of study; a topic inviting research and development;

"he worked at the frontier of brain science"