I spent a lot of years as a landscape architect, and once a client wanted to hire me to design a swimming pool to be cantilevered over a steep hillside. I'd no interest in doing that, but that was what the job (that I didn't take) was. I figure the words vary depending on who and where you are. In the swimming pool situation, I think of it as an adjective, but had I been interested I would have called in at least a civil and maybe structural engineers I knew. I worked in California, and I've seen wording vary between California and other locales for the same thing.. I don't mind overhang either.