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folie de grandeur

[French faw-leeduh grahn-dœr]
noun, plural fo·lies de gran·deur [French faw-leeduh grahn-dœr] /French fɔ lidə grɑ̃ˈdœr/. Psychiatry.
  1. a delusion of grandeur; megalomania.
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Also folie des grandeurs [French faw-lee dey grahn-dœr] /French fɔ li deɪ grɑ̃ˈdœr/.

Origin of folie de grandeur

From French
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for folie de grandeur

folie de grandeur

noun
  1. delusions of grandeur
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Word Origin

literally: madness of grandeur
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