an undeveloped field of study; a topic inviting research and development; "he worked at the frontier of brain science"
an international boundary or the area (often fortified) immediately inside the boundary
a wilderness at the edge of a settled area of a country; "the individualism of the frontier in Andrew Jackson''s day"
其他语种释义
frontierとは意味:frontier n. 境界; 国境, 辺境; 最前線, 最先端. 【動詞+】 ◆advance the frontiers of human knowledge 人間の知識の最前線を前進させる. advance the frontiers of civilization. ◆attack a frontier 国境に侵攻する ◆conquer a new frontier 新しい辺境を征服する...