correctional

noun

1. a correcting or being corrected
2. a change that corrects a mistake; change from wrong to right, or from abnormal to normal; emendation; rectification
3. the amount of change made in correcting
4. 1. punishment or scolding to correct faults
   2. punishment and rehabilitation within a prison system
5. Finance a brief, temporary reversal in the trend of prices in a financial market, esp. a short-term decline following, or in the midst of, a long-term rise in prices