Noun
An area of land that has not been surveyed.
(figuratively) Synonym of uncharted water (an unknown situation).
Source: en.wiktionary.orgA scholar like myself who is not a Sinologist and yet ventures the proposition that Chinese languages should be rewritten in the Greek alphabet (or "Romanized", to use the current term) is treading on uncharted territory (for him) and does so at his peril. Eric A. Havelock
Life is uncharted territory. It reveals its story one moment at a time. Leo Buscaglia
Comedy to the Senate? Well, there certainly hasn't been a satirist or a political satirist who's done that. So, that really was uncharted territory during the campaign. But I think it's a good thing. Some people thought that it was an odd career arc, but to me it made absolute sense. Al Franken
I'm always drawn to writing things that feel like uncharted territory. Laura Wade