Source : Webster's Revised Unabridged Dictionary (1913)

Administrative \Ad*min"is*tra`tive\, a. [L. administrativus: cf.
   F. administratif.]
   Pertaining to administration; administering; executive; as,
   an administrative body, ability, or energy. --
   {Ad*min"is*tra`tive*ly}, adv.

Source : WordNet®

administratively
     adv : by or for an administrator; "this decision was made
           administratively"