To me conceptual design has to do with the creation of concepts and ideas- often channelled through characters- that can potentially become functional in our everyday experience. But even function is a relative term. If a design seeks to offer Inspiration and express Beauty, that in itself is a function. It doesn't always have to translate into a technological feat or tangible object.
So that kind of describes part of what I do. I am not the person who draws my designs, I am the one who thinks them up, sees them & their back story in my mind's eye, imbues them with meaning and my collaborators put them on paper.
OK, OK, occasionally I do a few rough sketches. ^^^