Source : Webster's Revised Unabridged Dictionary (1913)

Diplomatic \Dip`lo*mat"ic\, Diplomatical \Dip`lo*mat"ic*al\, a.
   [Cf. diplomatique.]
   1. Pertaining to diplomacy; relating to the foreign ministers
      at a court, who are called the diplomatic body.

   2. Characterized by tact and shrewdness; dexterous; artful;
      as, diplomatic management.

   3. Pertaining to diplomatics; paleographic. --Astle.

Source : WordNet®

diplomatical
     adj : skilled in dealing with sensitive matters or people [syn: {diplomatic}]
           [ant: {undiplomatic}]