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[mon-uh-mey-nee-uh, -meyn-yuh] /ˌmɒn əˈmeɪ ni ə, -ˈmeɪn yə/
(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 forms
[mon-uh-mey-nee-ak] /ˌmɒn əˈmeɪ niˌæk/ (Show IPA),
[mon-uh-muh-nahy-uh-kuh l] /ˌmɒn ə məˈnaɪ ə kəl/ (Show IPA),
adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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Examples from the Web for monomania
Historical Examples
  • "There are no limits to the possibilities of monomania," I answered.

    The Return of Sherlock Holmes Arthur Conan Doyle
  • monomania is a derangement of mind in regard to a single subject only.

    Orthography 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.

    Afterwards 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
  • monomania is mental derangement as to one subject or object.

    English Synonyms and Antonyms James Champlin Fernald
  • The monomania of the haunted man gripped him and would not release him.

    Tongues of Conscience

    Robert Smythe Hichens
  • I should rather say that his intense folly has taken the form of monomania.

    The Missouri Outlaws

    Gustave Aimard
  • I should fall into a monomania, and one of a very loathsome kind.'

    Demos George Gissing
  • But the monomania was on him, and he started for the island in disguise.

    The Life of Mazzini Bolton King
British Dictionary definitions for monomania


an excessive mental preoccupation with one thing, idea, etc
Derived Forms
monomaniac, noun, adjective
monomaniacal (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
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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
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monomania in Medicine

monomania mon·o·ma·ni·a (mŏn'ə-mā'nē-ə, -mān'yə)
Pathological obsession with one idea or subject, as in paranoia.

mon'o·ma'ni·ac' (-mā'nē-āk') n.
mon'o·ma·ni'a·cal (-mə-nī'ə-kəl) adj.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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