What is the meaning of thinness?

noun

• Relatively small dimension through an object as opposed to its length or width.
  • usage: "the tenuity of a hair"; "the thinness of a rope"
  • synonyms: tenuity, slenderness
• The property of having little body fat.
  • synonyms: leanness, spareness
• The property of being very narrow or thin.
  • usage: "he marvelled at the fineness of her hair"
  • synonyms: fineness
• The property of being scanty or scattered; lacking denseness.
  • synonyms: sparseness, spareness, sparsity
• A consistency of low viscosity.
  • usage: "he disliked the thinness of the soup"