What does "superficial" mean?

Superficial: 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. This superficial tale Is but a preface of her worthy praise. Shak. He is a presumptuous and superficial writer. Burke. That superficial judgment, which happens to be right without deserving to be so. J. H. Newman. -- Su`per*fi"cial*ly, adv. -- Su`per*fi"cial*ness, n.