1. An area of land that has not been officially measured, mapped, or examined in detail
The explorers ventured into unsurveyed territory in the Amazon rainforest.
Os exploradores se aventuraram em território não mapeado na floresta amazônica.
2. A field of study or subject matter that has not been thoroughly investigated or documented
Quantum mechanics was once unsurveyed territory in physics.
A mecânica quântica foi uma vez território não explorado na física.