Source : Webster's Revised Unabridged Dictionary (1913)

Correction \Cor*rec"tion\ (k?r-r?k"sh?n), n. [L. correctio: cf.
   F. correction.]
   1. The act of correcting, or making that right which was
      wrong; change for the better; amendment; rectification, as
      of an erroneous statement.

            The due correction of swearing, rioting, neglect of
            God's word, and other scandalouss vices. --Strype.

   2. The act of reproving or punishing, or that which is
      intended to rectify or to cure faults; punishment;
      discipline; chastisement.

            Correction and instruction must both work Ere this
            rude beast will profit.               --Shak.

   3. That which is substituted in the place of what is wrong;
      an emendation; as, the corrections on a proof sheet should
      be set in the margin.

   4. Abatement of noxious qualities; the counteraction of what
      is inconvenient or hurtful in its effects; as, the
      correction of acidity in the stomach.

   5. An allowance made for inaccuracy in an instrument; as,
      chronometer correction; compass correction.

   {Correction line} (Surv.), a parallel used as a new base line
      in laying out township in the government lands of the
      United States. The adoption at certain intervals of a
      correction line is necessitated by the convergence of of
      meridians, and the statute requirement that the townships
      must be squares.

   {House of correction}, a house where disorderly persons are
      confined; a bridewell.

   {Under correction}, subject to correction; admitting the
      possibility of error.

Source : WordNet®

correction
     n 1: the act of offering an improvement to replace a mistake;
          setting right [syn: {rectification}]
     2: a quantity that is added or subtracted in order to increase
        the accuracy of a scientific measure [syn: {fudge factor}]
     3: something substituted for an error
     4: a rebuke for making a mistake [syn: {chastening}, {chastisement}]
     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" [syn: {discipline}]
     7: treatment of a specific defect; "the correction of his
        vision with eye glasses"