The district or churches under the jurisdiction of a bishop; a bishopric.(noun)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "diocese" in a sentence
"Originally the term diocese (Gr. dioikesis) signified management of a household, thence administration or government in general."
"And the diocese is getting a new boss bishop in January!"
"It wasn't immediately known what Benson's position at the diocese is now."