Not clearly or explicitly stated or expressed. Her vague instructions left everyone confused about what to do next.
Indistinctly felt, perceived, understood, or recalled; hazy. He had a vague memory of his childhood home.
Not clearly defined, grasped, or understood; lacking precision or detail. The report was criticized for its vague conclusions.
Not having a clear or definite shape or form. The vague outline of the mountain could be seen through the mist.
(of a person or their manner) having or showing a lack of clear thought or attention; absent-minded He gave me a vague stare, as though he had no idea who I was.