Yes, multimedia is a term, but it has a different definition in a minority fandom than it does in the majority fandom here. And I do think it is worth respecting that fandom and including that definition on an equal level with a large fandom or a large community. I don't think the size of the fandom base matters, and my preference is to give the nod to a fannish definition over a non-fannish one, and in the case where there are two fannish definition, to include them both. Even when one of the fandoms is huge (LJ) and the other is 17 websites, a mailing list, and the definition of a term different from the one that most people on LJ use or have even heard of.