The Collaborative International Dictionary of English v.0.48:

Discoursive \Dis*cours"ive\, a. [See Discursive.]
   1. Reasoning; characterized by reasoning; passing from
      premises to consequences; discursive. --Milton.
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   2. Containing dialogue or conversation; interlocutory.
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            The epic is everywhere interlaced with dialogue or
            discoursive scenes.                   --Dryden.
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   3. Inclined to converse; conversable; communicative; as, a
      discoursive man. [R.]
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The Collaborative International Dictionary of English v.0.48:

Discoursive \Dis*cours"ive\, n.
   The state or quality of being discoursive or able to reason.
   [R.] --Feltham.
   [1913 Webster]