| 单词 | frontier |
| 释义 | frontier —frontierless, adj. —frontierlike, adj. /frun tear", fron-/; also, esp. Brit., /frun"tear/, n. 1. the part of a country that borders another country; boundary; border. 2. the land or territory that forms the furthest extent of a country's settled or inhabited regions. 3. Often, frontiers. a. the limit of knowledge or the most advanced achievement in a particular field: the frontiers of physics. b. an outer limit in a field of endeavor, esp. one in which the opportunities for research and development have not been exploited: the frontiers of space exploration. 4. Math. boundary (def. 2). adj. 5. of, pertaining to, or located on the frontier: a frontier town. [1350-1400; ME frounter < OF frontier, equiv. to front (in the sense of opposite side; see FRONT) + -ier -IER2] Syn. 1. See boundary. |
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