adj. vagu·er, vagu·est
1. Not clear in meaning or expression; inexplicit. See Synonyms at ambiguous.
2. Not thinking or expressing oneself clearly: "Most of us are quite vague about the theoretical underpinnings of the medical theories that guide our doctors" (Kwame Anthony Appiah).
3. Lacking definite shape, form, or character; indistinct: saw a vague outline of a building through the fog.
4. Indistinctly felt, perceived, understood, or recalled; hazy: a vague uneasiness.
[French, from Old French, wandering, from Latin vagus.]
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