Source : Webster's Revised Unabridged Dictionary (1913)

Approbative \Ap"pro*ba*tive\, a. [Cf. F. approbatif.]
   Approving, or implying approbation. --Milner.

Source : WordNet®

approbative
     adj : expressing or manifesting praise or approval; "approbative
           criticism" [syn: {approving}, {approbatory}, {plausive}]