Not palpable; that cannot be felt; extremely fine, so that no grit can be perceived by touch. "Impalpable powder." Boyle.
Not material; intangible; incorporeal. "Impalpable, void, and bodiless." Holland.
Not apprehensible, or readily apprehensible, by the mind; unreal; as, impalpable distinctions.
98,828 entries. Headwords are matched first, then definition text.