Source : Webster's Revised Unabridged Dictionary (1913)

Informative \In*form"a*tive\, a.
   Having power to inform, animate, or vivify. --Dr. H. More.

Source : WordNet®

informative
     adj 1: tending to increase knowledge or dissipate ignorance; "an
            enlightening glimpse of government in action" [syn: {enlightening},
             {instructive}] [ant: {unenlightening}]
     2: serving to instruct of enlighten or inform [syn: {instructive}]
        [ant: {uninstructive}]
     3: providing or conveying information [syn: {informatory}]
        [ant: {uninformative}]