What is the meaning of correction?

noun

• The act of offering an improvement to replace a mistake; setting right.
  • synonyms: rectification
• A quantity that is added or subtracted in order to increase the accuracy of a scientific measure.
  • synonyms: fudge factor
• Something substituted for an error.
• A rebuke for making a mistake.
  • synonyms: chastening, chastisement
• A drop in stock market activity or stock prices following a period of increases.
  • usage: "market runups are invariably followed by a correction"
• The act of punishing.
  • usage: "the offenders deserved the harsh discipline they received"
  • synonyms: discipline
• Treatment of a specific defect.
  • usage: "the correction of his vision with eye glasses"