A wireframe is an outline sketch of something, originally used for CAD.
Often now used for website design where they are quick mock ups, often a sketch on paper, of what a website will look like - but without any detailed content.
Not sure I have really heard the term used in a QlikView context, but the concept would be the same - a sketch consisting of the outlines of where your QlikView Objects would be placed, but with no details in the wireframe boxes themselves.
