Source : Webster's Revised Unabridged Dictionary (1913)

Emphatic \Em*phat"ic\, Emphatical \Em*phat"ic*al\, a. [Gr. ?:
   cf. F. emphatique. See {Emphasis}.]
   1. Uttered with emphasis; made prominent and impressive by a
      peculiar stress of voice; laying stress; deserving of
      stress or emphasis; forcible; impressive; strong; as, to
      remonstrate in am emphatic manner; an emphatic word; an
      emphatic tone; emphatic reasoning.

   2. Striking the sense; attracting special attention;
      impressive; forcible. ``Emphatical colors.'' --Boyle.
      ``Emphatical evils.'' --Bp. Reynolds.

   Syn: Forcible; earnest; impressive; energetic; striking;
        positive; important; special; significant.

Source : WordNet®

emphatic
     adj 1: spoken with emphasis; "an emphatic word" [syn: {emphasized},
             {emphasised}]
     2: sudden and strong; "an emphatic no" [syn: {exclamatory}]
     3: forceful and definite in expression or action; "the document
        contained a particularly emphatic guarantee of religious
        liberty" [syn: {forceful}]