highly educated; having extensive information or understanding; "an enlightened public"; "knowing instructors"; "a knowledgeable critic"; "a knowledgeable audience"
clear and certain mental apprehension evidencing the possession of inside information
{s} having or reflecting knowledge or information; shrewd, sharp, astute; conscious, intentional, deliberate
A knowing gesture or remark is one that shows that you understand something, for example the way that someone is feeling or what they really mean, even though it has not been mentioned directly. Ron gave her a knowing smile Dan exchanged a knowing look with Harry. + knowingly know·ing·ly He smiled knowingly. showing that you know all about something, even if it has not been discussed directly
alert and fully informed; "politically aware"; "a knowing collector of rare books"; "the most technically aware of the novelists under thirty"- W S Graham; "surprisingly knowledgeable about what was going on"