(1):
(a.) Reaching or comprehending only what is obvious or apparent; not deep or profound; shallow; - said especially in respect to study, learning, and the like; as, a superficial scholar; superficial knowledge.
(2):
(a.) Of or pertaining to the superficies, or surface; lying on the surface; shallow; not deep; as, a superficial color; a superficial covering; superficial measure or contents; superficial tillage.