D defs.my
Entry 1 sense Webster, 1913

Terra incognita

· Ter·ra in·cog·ni·ta · IPA
01 An unknown land; unexplored country.
  1. 1.
    An unknown land; unexplored country.
    “The enormous tracts lying outside China proper, still almost terrae incognitae.” — A. R. Colquhoun.