Source : Webster's Revised Unabridged Dictionary (1913)

Exaggeration \Ex*ag`ger*a"tion\, n. [L. exaggeratio : cf. F.
   exag['e]ration.]
   1. The act of heaping or piling up. [Obs.] ``Exaggeration of
      sand.'' --Sir M. Hale.

   2. The act of exaggerating; the act of doing or representing
      in an excessive manner; a going beyond the bounds of truth
      reason, or justice; a hyperbolical representation;
      hyperbole; overstatement.

            No need of an exaggeration of what they saw. --I.
                                                  Taylor.

   3. (Paint.) A representation of things beyond natural life,
      in expression, beauty, power, vigor.

Source : WordNet®

exaggeration
     n 1: extravagant exaggeration [syn: {hyperbole}]
     2: the act of making something more noticeable than usual; "the
        dance involved a deliberate exaggeration of his
        awkwardness"
     3: making to seem more important than it really is [syn: {overstatement},
         {magnification}] [ant: {understatement}]