Source : Webster's Revised Unabridged Dictionary (1913)

Significative \Sig*nif"i*ca*tive\, a. [L. significativus: cf. F.
   significatif.]
   1. Betokening or representing by an external sign.

            The holy symbols or signs are not barely
            significative.                        --Brerewood.

   2. Having signification or meaning; expressive of a meaning
      or purpose; significant.

            Neither in the degrees of kindred they were
            destitute of significative words.     --Camden.
      -- {Sig*nif"i*ca*tive*ly}, adv. --
      {Sig*nif"i*ca*tive*ness}, n.

Source : WordNet®

significative
     adj : (usually followed by `of') pointing out or revealing
           clearly;  "actions indicative of fear" [syn: {indicative},
            {indicatory}, {revelatory}, {suggestive}]