noun
- an unknown or unexplored region, especially on a map
Usage: formal; often used in the phrase ‘terra incognita’
Examples
- The Amazon rainforest was once considered incognita by European explorers.
- Large portions of the ocean floor remain incognita to scientists.
- The polar regions were incognita until the early 20th century.
- Space exploration continues to reveal what was previously incognita.
- Ancient maps often marked unexplored areas as incognita.