Unknown or unexplored territory.
More example sentences
- The Highlands and Western Isles of Scotland were terra incognita to almost all Englishmen, and most Lowland Scots.
- When Thomas Jefferson sent young Meriwether Lewis, William Clark, and the Corps of Discovery to survey the lands beyond the Mississippi, the West was terra incognita.
- Hence, large tracts of the North-Central Norwegian Caledonides are practically terra incognita with respect to late- to post-orogenic structural development.
Latin, 'unknown land'.
Definition of terra incognita in:
- The British & World English dictionary