Source : Webster's Revised Unabridged Dictionary (1913)

Exhortation \Ex`hor*ta"tion\, n. [L. exhortatio: cf. F.
   exhortation.]
   1. The act of practice of exhorting; the act of inciting to
      laudable deeds; incitement to that which is good or
      commendable.

   2. Language intended to incite and encourage; advice;
      counsel; admonition.

            I'll end my exhortation after dinner. --Shak.

Source : WordNet®

exhortation
     n 1: a communication intended to urge or persuade the recipients
          to take some action
     2: the act of exhorting; an earnest attempt at persuasion [syn:
         {incitement}]