uncharted territory

== English == === Noun === uncharted territory (countable and uncountable, plural uncharted territories) An area of land never before explored, mapped, or surveyed. Synonym: terra incognita Antonyms: home ground, homeland (figurative) Ideas, concepts, or situations that have never yet been tried or explored. Synonyms: terra incognita, uncharted waters Coordinate term: terra firma (often antonymous to this sense)