It comes from Product Design as shown in the picture. Wireframes were a visual representation of 3D objects. Usually created through computer modelling but the above picture is a real life steel wireframes, really standing on the road.
It’s an actual full-scale three-dimensional wireframe model created by artist Benedict Radcliffe. It was comissioned by Japan’s Dentsu Inc. for an ad campaign in the Middle East. Each of Radcliffe’s models, which also include a Lambourghini, is painstakingly crafted from welded 10mm steel tubes.
What are Wireframes?
Wireframes is a grey-scale visual representation of the structure of application screens (or web pages). It indicates the size, placement, layout, widgets of the elements on the screen. Although it does not have colors, it show to a large extent the visual hierarchy of the page. Wireframes can be built using paper or computer apps like visio and powerpoint.