What is the meaning of faintness?

noun

• A feeling of faintness and of being ready to swoon.
• The property of being without strength.
  • usage: "the faintness or potency of the feeling"
• Barely audible.
• The trait of lacking boldness and courage.
  • usage: "faintness of heart and infirmity of purpose"
  • synonyms: faintheartedness
• The quality of being dim or lacking contrast.
  • synonyms: dimness