1. A weak or unclear sign, mark, or indication of something; a scarcely perceptible trace or hint
The detective found only a vague trace of evidence at the crime scene.
O detetive encontrou apenas um rastro vago de evidência no local do crime.
2. A faint or indistinct trail or path left behind
The hiker could barely see the vague trail through the forest.
O caminhante mal conseguia ver o rastro vago pela floresta.