Source : Webster's Revised Unabridged Dictionary (1913)

Deliberative \De*lib"er*a*tive\, a. [L. deliberativus: cf. F.
   d['e]lib['e]ratif.]
   Pertaining to deliberation; proceeding or acting by
   deliberation, or by discussion and examination; deliberating;
   as, a deliberative body.

         A consummate work of deliberative wisdom. --Bancroft.

         The court of jurisdiction is to be distinguished from
         the deliberative body, the advisers of the crown.
                                                  --Hallam.

Deliberative \De*lib"er*a*tive\, n.
   1. A discourse in which a question is discussed, or weighed
      and examined. --Bacon.

   2. A kind of rhetoric employed in proving a thing and
      convincing others of its truth, in order to persuade them
      to adopt it.

Source : WordNet®

deliberative
     adj : involved in or characterized by deliberation and discussion
           and examination; "a deliberative body"