'Skin-deep' definitions:

Definition of 'skin-deep'

From: WordNet
adjective
Penetrating no deeper than the skin: "her beauty is only skin-deep"

Definition of 'Skin-deep'

From: GCIDE
  • Skin-deep \Skin"-deep`\, a. Not deeper than the skin; hence, superficial. --Lowell. [1913 Webster]