1. (a.) Imperceptible to the touch; intangible; extremely fine, so that no grit can be perceived by touch; as, impalpable distinctions\.

2. (a.) Not material; incorporeal.

3. (a.) Not apprehensible, or readily apprehensible, by the mind; unreal.

airy asomatous astral atomic bodiless branny chalklike chalky comminute comminuted corpuscular crushed decarnate decarnated detrital detrited discarnate disembodied disintegrated dusty efflorescent embryonic ethereal evanescent extramundane farinaceous fine flaky floury furfuraceous germinal ghostly gone to dust granular grated ground immaterial imperceptible imponderable inappreciable incorporate incorporeal indiscernible infinitesimal insensible insubstantial intangible invisible levigated mealy microcosmic microscopic milled molecular nonmaterial nonphysical nonsubstantial occult otherworldly pestled phantom powdered powdery psychic pulverant pulverized pulverulent reduced to powder scaly scobicular scobiform scurfy shadowy sharded shredded spiritual subatomic supernatural tenuous thin transmundane triturated ultramicroscopic unapparent unappreciable unconcrete unearthly unembodied unextended unfleshly unobservable unperceivable unphysical unseeable unsolid unsubstanced unsubstantial unworldly weightless