Adjective
1. lacking physical depth; having little spatial extension downward or inward from an outer surface or backward or outward from a center;
"shallow water""a shallow dish""a shallow cut""a shallow closet""established a shallow beachhead""hit the ball to shallow left field"2. not deep or strong; not affecting one deeply;
"shallow breathing""a night of shallow fretful sleep""in a shallow trance"3. lacking depth of intellect or knowledge; concerned only with what is obvious;
"shallow people""his arguments seemed shallow and tedious"