1. A region or area whose political status, sovereignty, or ownership has not been formally announced or officially recognized by governing authorities
The undeclared territory remained disputed between the two nations for decades.
O território não declarado permaneceu disputado entre as duas nações por décadas.
2. In legal or administrative contexts, land or area that has not been officially claimed, demarcated, or registered by any state or entity
The explorers discovered undeclared territory in the remote region.
Os exploradores descobriram um território não declarado na região remota.