Defined as any fungus that's big enough to be seen with the naked eye. This includes fungi that have visible [mushrooms, and those that have visible above-ground (epigeous) fruiting bodies (sporocarps). Lichens are sometimes included, depending on definition.
TODO: Epigeous sporocarps that don't have an agaricoid morphology. [TODO: look more here] (so, cleistothecium, perithecium, gymnothecium, perithecium?)
Above-ground non-fruiting-bodies
Conidiomata, which reproduce asexually, which means they aren't sporocarps (which always reproduce sexually).