Source : Webster's Revised Unabridged Dictionary (1913)

Castigation \Cas`ti*ga"tion\, n. [L. catigatio.]
   1. Corrective punishment; chastisement; reproof; pungent
      criticism.

            The keenest castigation of her slanderers. --W.
                                                  Irving.

   2. Emendation; correction. [Obs.]

Source : WordNet®

castigation
     n 1: a severe scolding [syn: {earful}, {bawling out}, {chewing
          out}, {upbraiding}, {going-over}, {dressing down}]
     2: verbal punishment [syn: {chastisement}]