I have seen several very interesting discussions of this question in a couple of different forums. Generally, the consensus seemed to be that the only requirement that could be agreed upon was that pieces of something be stuck to something else. Not much of a definition. However, I think by keeping it that loose, we (mosaic artists) see many things in a different light. Case in point: an article I found about the kick off of the fall season in Chelsea. The photo below is of a piece by Maya Lin (Washington D.C. Vietnam Vet Memorial designer). It is made of 2X4s. Are they stuck to something? I can’t tell for sure, but I suspect they are. If so, it fits our basic description as a mosaic.
The surface of this piece reminds me of a 3D smalti work. It is amazingly fluid.
So what are your thoughts? Does this qualify as mosaic?