/,ʌn'tʃɑ:tɪd; ʌn`tʃɑrtɪd/
adj
1 not marked on a map or chart 图上未标明的
*an uncharted island 地图上没有标明的岛.
2 not explored or mapped 未经勘测的; 未绘制成图的
*an uncharted area, zone, etc 未经勘探的地区、地带等
* (fig 比喻) the uncharted depths ofhuman emotions 未经探究的人的感情深处
* Our researchis sailing into uncharted waters/seas, ie investigating fieldsthat have not been researched before. 我们的研究工作正深入到从未涉及过的领域.

adj
uncharted waters/territory/area etc
a situation or activity that you have never experienced or tried before
　This new project will take us into uncharted territory.
not marked on any maps
　an uncharted island