The Collaborative International Dictionary of English v.0.48:

Vicariate \Vi*ca"ri*ate\, a.
   Having delegated power, as a vicar; vicarious. --Barrow.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Vicariate \Vi*ca"ri*ate\, n. [LL. vicariatus, or F. vicariat.]
   Delegated office or power; vicarship; the office or oversight
   of a vicar.
   [1913 Webster]

         The vicariate of that part of Germany which is governed
         by the Saxon laws devolved on the elector of Saxony.
                                                  --Robertson.
   [1913 Webster]

WordNet (r) 3.0 (2006):

vicariate
    n 1: the religious institution under the authority of a vicar
         [syn: vicariate, vicarship]