1. An unclear, vague, or ill-defined dividing line or limit between two things, areas, or concepts
The nebulous boundary between art and science has long been debated by scholars.
A fronteira nebulosa entre arte e ciência tem sido debatida há muito tempo pelos estudiosos.
2. A border or demarcation that lacks clear definition or precise delineation
There exists a nebulous boundary between professional and personal life in remote work.
Existe uma fronteira nebulosa entre a vida profissional e pessoal no trabalho remoto.