Definition of Terra Australis Incognita in English:

Terra Australis Incognita

proper noun

  • The name given by early European map-makers to a land mass presumed to exist south of the known world.

    ‘Cook was told to take possession of Terra Australis Incognita’

Origin

Early 17th century: Latin, ‘unknown southern land’.

Pronunciation

Terra Australis Incognita

/ˈtɛrə ɒˈstrɑːlɪs ɪnkɒɡˈniːtə/