Source : Webster's Revised Unabridged Dictionary (1913)

Dissuasion \Dis*sua"sion\, n. [L. dissuasio: cf. F. dissuasion.
   See {Dissuade}.]
   1. The act of dissuading; exhortation against a thing;
      dehortation.

            In spite of all the dissuasions of his friends.
                                                  --Boyle.

   2. A motive or consideration tending to dissuade; a
      dissuasive.

Source : WordNet®

dissuasion
     n 1: a communication that dissuades you
     2: persuasion not to do something; the act of talking someone
        out of an intended course of action
     3: influencing someone to desist by argument or reasoning or
        entreaty [ant: {persuasion}]