The Collaborative International Dictionary of English v.0.48:

Administrate \Ad*min"is*trate\, v. t. [L. administratus, p. p.
   of administrare.]
   To administer. [R.] --Milman.
   [1913 Webster]

WordNet (r) 3.0 (2006):

administrate
    v 1: work in an administrative capacity; supervise or be in
         charge of; "administer a program"; "she administers the
         funds" [syn: administer, administrate]