'Duchy' definitions:

Definition of 'duchy'

From: WordNet
noun
The domain controlled by a duke or duchess [syn: duchy, dukedom]

Definition of 'Duchy'

From: GCIDE
  • Duchy \Duch"y\ (d[u^]ch"[y^]), n.; pl. Duchies. [F. duch['e], OF. duch['e]e, (assumed) LL. ducitas, fr. L. dux. See Duke.] The territory or dominions of a duke; a dukedom. [1913 Webster]