1. An area of land or territory that has not yet been explored, mapped, or visited by people
Explorers set out to find undiscovered regions in the Amazon rainforest.
Exploradores partiram em busca de regiões inexploradas na floresta amazônica.
2. A figurative area of knowledge, experience, or understanding that has not yet been investigated
The study of deep ocean ecosystems remains an undiscovered region of marine biology.
O estudo dos ecossistemas do fundo oceânico permanece uma região inexplorada da biologia marinha.