Source : Webster's Revised Unabridged Dictionary (1913)

Reproof \Re*proof"\ (r?-pr??f"), n. [OE. reproef. See {Proof},
   {Reprove}.]
   1. Refutation; confutation; contradiction. [Obs.]

   2. An expression of blame or censure; especially, blame
      expressed to the face; censure for a fault; chiding;
      reproach.

            Those best can bear reproof who merit praise.
                                                  --Pope.

   Syn: Admonition; reprehension; chiding; reprimand; rebuke;
        censure; blame. See {Admonition}.

Source : WordNet®

reproof
     n : an act or expression of criticism and censure; "he had to
         take the rebuke with a smile on his face" [syn: {rebuke},
          {reproval}, {reprehension}, {reprimand}]
     v : censure severely or angrily; "The mother scolded the child
         for entering a stranger's car"; "The deputy ragged the
         Prime Minister"; "The customer dressed down the waiter
         for bringing cold soup" [syn: {call on the carpet}, {rebuke},
          {rag}, {trounce}, {lecture}, {reprimand}, {jaw}, {dress
         down}, {call down}, {scold}, {chide}, {berate}, {bawl out},
          {remonstrate}, {chew out}, {chew up}, {have words}, {lambaste},
          {lambast}]