Psychiatry. a symptom of mental illness marked by delusions of greatness, wealth, etc.
an obsession with doing extravagant or grand things.

Nearby words

  1. megaloenteron,
  2. megalogastria,
  3. megaloglossia,
  4. megalohepatia,
  5. megalokaryocyte,
  6. megalomaniac,
  7. megalomaniacal,
  8. megalomelia,
  9. megalopenis,
  10. megalophthalmus

Origin of megalomania

First recorded in 1885–90; megalo- + -mania Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for megalomania

British Dictionary definitions for megalomania



a mental illness characterized by delusions of grandeur, power, wealth, etc
informal a lust or craving for power
Derived Formsmegalomaniac, adjective, nounmegalomaniacal (ˌmɛɡələʊməˈnaɪəkəl), adjective

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

Word Origin and History for megalomania



"delusions of greatness," 1866, from French mégalomanie; see megalo- + mania "madness."

Online Etymology Dictionary, © 2010 Douglas Harper

Medicine definitions for megalomania


[mĕg′ə-lō-mānē-ə, -mānyə]


A psychopathological condition in which delusional fantasies of wealth, power, or omnipotence predominate.
An obsession with grandiose or extravagant things or actions.
Related formsmeg′a•lo•mani•ac′ n.meg′a•lo•ma•nia•cal (-mə-nīə-kəl) null adj.

The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

Culture definitions for megalomania



Delusions of grandeur; an extreme form of egotism. Adolf Hitler is generally considered to have been a megalomaniac.

The New Dictionary of Cultural Literacy, Third Edition Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.