The Collaborative International Dictionary of English v.0.48:

Barony \Bar"o*ny\, n.; pl. Baronies. [OF. baronie, F.
   baronnie, LL. baronia. See Baron.]
   1. The fee or domain of a baron; the lordship, dignity, or
      rank of a baron.
      [1913 Webster]

   2. In Ireland, a territorial division, corresponding nearly
      to the English hundred, and supposed to have been
      originally the district of a native chief. There are 252
      of these baronies. In Scotland, an extensive freehold. It
      may be held by a commoner. --Brande & C.
      [1913 Webster]

WordNet (r) 3.0 (2006):

barony
    n 1: the estate of a baron
    2: the rank or dignity or position of a baronet or baroness
       [syn: baronetcy, barony]
    3: the domain of a baron