an inorganic species or substance occurring in nature, having a definite chemical composition and usually a distinct crystalline form. rocks, except certain glassy igneous forms, are either simple minerals or aggregates of minerals.-a mine.-anything which is neither animal nor vegetable, as in the most general classification of things into three kingdoms (animal, vegetable, and mineral).-of or pertaining to minerals; consisting of a mineral or of minerals; as, a mineral substance.-impregnated with minerals; as, mineral waters.