Definition of "substantiative" []

• Serving to support or corroborate (adjective)

WordNet. Princeton University. 2010.

• "If you have something substantiative to contribuite, please provide supporting evidence."
• "Last week, Markey requested that BP provide more information about the size of the leak, but has gotten no substantiative response to date."
• "You talk about all of Clinton's experience in the Sentate .... but please name one piece of substantiative legislation that she has sponsored."