knowledgeable

highly educated; having extensive information or understanding; "knowing instructors"; "a knowledgeable critic"; "a knowledgeable audience"

alert and fully informed; "a knowing collector of rare books"; "surprisingly knowledgeable about what was going on"

thoroughly acquainted through study or experience; "this girl, so intimate with nature"-W.H.Hudson; "knowledgeable about the technique of painting"- Herbert Read