1. A path, track, or route that has been discovered, investigated, or traversed by people; a well-known or established way through natural terrain
The hikers followed an explored trail through the forest.
Os caminhantes seguiram uma trilha explorada pela floresta.
2. A figurative path of inquiry or investigation that has already been examined or pursued
That's a well-explored trail in scientific research.
Essa é uma trilha bem explorada na pesquisa científica.