[mon-uh-mey-nee-uh, -meyn-yuh]


(no longer in technical use) a psychosis characterized by thoughts confined to one idea or group of ideas.
an inordinate or obsessive zeal for or interest in a single thing, idea, subject, or the like.

Origin of monomania

From New Latin, dating back to 1815–25; see origin at mono-, -mania
Related formsmon·o·ma·ni·ac [mon-uh-mey-nee-ak] /ˌmɒn əˈmeɪ niˌæk/, nounmon·o·ma·ni·a·cal [mon-uh-muh-nahy-uh-kuh l] /ˌmɒn ə məˈnaɪ ə kəl/, adjective Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for monomania

Historical Examples of monomania

  • "There are no limits to the possibilities of monomania," I answered.

  • Monomania is a derangement of mind in regard to a single subject only.


    Elmer W. Cavins

  • I understand that this becomes a monomania with a woman who lives in a rented house.

    The House

    Eugene Field

  • "No, it is possible she was the victim of a sort of monomania," conceded Anstice.


    Kathlyn Rhodes

  • You really have a great deal to answer for, in encouraging this kind of monomania.'

    'That Very Mab'

    May Kendall and Andrew Lang

British Dictionary definitions for monomania



an excessive mental preoccupation with one thing, idea, etc
Derived Formsmonomaniac, noun, adjectivemonomaniacal (ˌmɒnəʊməˈnaɪəkəl), 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 monomania

"insanity in regard to a single subect or class of subjects," 1820, probably on model of earlier French monomanie, from Modern Latin monomania, from Greek monos "single, alone" (see mono-) + mania (see mania).

Online Etymology Dictionary, © 2010 Douglas Harper

monomania in Medicine


[mŏn′ə-mānē-ə, -mānyə]


Pathological obsession with one idea or subject, as in paranoia.
Related formsmon′o•mani•ac′ (-mānē-ăk′) n.mon′o•ma•nia•cal (-mə-nīə-kəl) adj.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.