archduchy

[ ahrch-duhch-ee ]
/ ˈɑrtʃˈdʌtʃ i /

noun, plural arch·duch·ies.

the domain of an archduke or an archduchess.

Origin of archduchy

1670–80; arch-1 + duchy, modeled on French archeduché (now archiduché)
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

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British Dictionary definitions for archduchy

archduchy

/ (ˈɑːtʃˈdʌtʃɪ) /

noun plural -duchies

the territory ruled by an archduke or archduchess
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012