Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun A psychopathological condition characterized by delusional fantasies of wealth, power, or omnipotence.
  • noun An obsession with grandiose or extravagant things or actions.

from The Century Dictionary.

  • noun A form of insane delusion the subjects of which imagine themselves to be very great, exalted, or powerful personages; the delusion of grandeur.

from the GNU version of the Collaborative International Dictionary of English.

  • noun (Pathol.) A form of mental alienation in which the patient has grandiose delusions.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun A psychopathological condition characterized by delusional fantasies of wealth, power, or omnipotence.
  • noun An obsession with grandiose or extravagant things or actions.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • noun a psychological state characterized by delusions of grandeur

Etymologies

from Wiktionary, Creative Commons Attribution/Share-Alike License

First attested in 1890, from megalo- + -mania.

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