Definition of terra incognita in English:

terra incognita

Line breaks: terra in¦cog|nita
Pronunciation: /ɪnˈkɒgnɪtə
 
, ˌɪnkɒgˈniːtə/

noun

[mass noun]
  • Unknown or unexplored territory: the traveller is moving now through terra incognita figurative one actor’s familiar world is another’s terra incognita
    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.

Origin

Latin, 'unknown land'.

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elaborate ornamentation of a vocal melody