What is the meaning of deepness?

noun

• The intellectual ability to penetrate deeply into ideas.
  • synonyms: astuteness, profundity, profoundness, depth
• The quality of being physically deep.
  • usage: "the profundity of the mine was almost a mile"
  • synonyms: profundity, profoundness
• The extent downward or backward or inward.
  • usage: "the depth of the water"; "depth of a shelf"; "depth of a closet"
  • synonyms: depth
• A low pitch that is loud and voluminous. .