The Collaborative International Dictionary of English v.0.48:

Pastorate \Pas"tor*ate\, n. [Cf. F. pastorat. See Pastor.]
   The office, state, or jurisdiction of a pastor.
   [1913 Webster]

WordNet (r) 3.0 (2006):

pastorate
    n 1: pastors collectively
    2: the position of pastor [syn: pastorship, pastorate]