1. Land that has not been officially marked, surveyed, or established with clear boundaries by legal or administrative authorities
The explorers ventured into undemarked land beyond the known territories.
Os exploradores se aventuraram em terras não demarcadas além dos territórios conhecidos.
2. Territory whose borders or ownership have not been formally defined or recorded
The dispute arose over undemarked land between the two properties.
A disputa surgiu sobre a terra não demarcada entre as duas propriedades.