What does CORRECTION mean?

noun

1. the act of offering an improvement to replace a mistake; setting right
2. a quantity that is added or subtracted in order to increase the accuracy of a scientific measure
3. something substituted for an error
4. a rebuke for making a mistake
5. a drop in stock market activity or stock prices following a period of increases“market runups are invariably followed by a correction”
6. the act of punishing“the offenders deserved the harsh discipline they received”
7. treatment of a specific defect“the correction of his vision with eye glasses”