Source : Webster's Revised Unabridged Dictionary (1913)

Admonition \Ad`mo*ni"tion\, n. [OE. amonicioun, OF. amonition,
   F. admonition, fr. L. admonitio, fr. admonere. See
   {Admonish}.]
   Gentle or friendly reproof; counseling against a fault or
   error; expression of authoritative advice; friendly caution
   or warning.

   Syn: {Admonition}, {Reprehension}, {Reproof}.

   Usage: Admonition is prospective, and relates to moral
          delinquencies; its object is to prevent further
          transgression. Reprehension and reproof are
          retrospective, the former being milder than the
          latter. A person of any age or station may be liable
          to reprehension in case of wrong conduct; but reproof
          is the act of a superior. It is authoritative
          fault-finding or censure addressed to children or to
          inferiors.

Source : WordNet®

admonition
     n 1: cautionary advice about something imminent (especially
          imminent danger) [syn: {monition}, {warning}, {word of
          advice}]
     2: a firm rebuke [syn: {admonishment}, {monition}]