What is the meaning of profoundness?

noun

• Extremeness of degree.
  • usage: "the profoundness of his ignorance"
• Wisdom that is recondite and abstruse and profound.
  • usage: "the anthropologist was impressed by the reconditeness of the native proverbs"
  • synonyms: reconditeness, abstruseness, abstrusity, profundity
• The intellectual ability to penetrate deeply into ideas.
  • synonyms: astuteness, profundity, depth, deepness
• The quality of being physically deep.
  • usage: "the profundity of the mine was almost a mile"
  • synonyms: deepness, profundity
• Intellectual depth; penetrating knowledge; keen insight; etc.
  • usage: "the depth of my feeling"; "the profoundness of the silence"
  • synonyms: profundity