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donjon

American  
[duhn-juhn, don-] / ˈdʌn dʒən, ˈdɒn- /

noun

  1. the inner tower, keep, or stronghold of a castle.

donjon British  
/ ˈdʌndʒən, ˈdɒn- /

noun

  1. Also called: dungeon.  the heavily fortified central tower or keep of a medieval castle

"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

Etymology

Origin of donjon

Variant of dungeon

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.