Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. Pathological obsession with one idea or subject.
  • n. Intent concentration on or exaggerated enthusiasm for a single subject or idea.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. Excessive interest or concentration on a singular object or subject.
  • n. A pathological obsession with one person, thing or idea.

from the GNU version of the Collaborative International Dictionary of English

  • n. Derangement of the mind in regard of a single subject only; also, such a concentration of interest upon one particular subject or train of ideas to show mental derangement.

from The Century Dictionary and Cyclopedia

  • n. Insanity in which there is a more or less complete limitation of the perverted mental action to a particular field, as a specific delusion, or an impulse to do some particular thing. The other mental functions may show some signs of degeneration.
  • n. In popular use, an unreasonable zeal for or interest in some one thing; a craze.
  • n. Synonyms Lunacy, Derangement, etc. See insanity.

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

  • n. a mania restricted to one thing or idea

Etymologies

Either: (Wiktionary)

Examples

  • "It is the sort of malady which we call monomania," said the doctor.

    The Count of Monte Cristo

  • “He never could be cured, the doctors said, for he had what they called monomania, — was always talking about his wife and darter that somebody had stole away years ago, and plannin 'revenge on that somebody.

    Mrs. Skaggs's husbands, and other sketches

  • "He never could be cured, the doctors said, for he had what they called monomania, -- was always talking about his wife and darter that somebody had stole away years ago, and plannin 'revenge on that somebody.

    Mrs. Skagg's Husbands and Other Stories

  • The verdict of literary criticism is that of the medical art -- he was insane; and to what extent this mania acted as a monomania, that is, how far he was himself deceived, the world can never know.

    English Literature, Considered as an Interpreter of English History Designed as a Manual of Instruction

  • And his monomania was the ruin of this woman who had taken from him in the very moment of consummation all that he had ever really loved in the world -- a thin, awkward, freckled, red-haired country girl, in whom, for the first and only time in all his life, he saw the vague and phantom promise of that trinity which he had never known -- a wife, a child, and a home.

    The Dark Star

  • Coincidently, Female Science Professor posted today about her disagreement with a colleague who wanted his female grad students to exhibit more "monomania" towards science.

    Archive 2008-03-01

  • This is not a particularly original argument, although in Mr. Freeman's case it becomes a kind of monomania, in which Israel is always the warmonger, always slapping away Arab hands extended in peace.

    Obama's National Intelligence Crackpot

  • Not because of Wright's "monomania" (to use another canard from Stanley's article), but because liberals and Democrats are too ashamed of their own slightly crazed grandpas-in-the-attic to understand how important it is to defend them (needless to say, GOPers understand very well).

    Hullabaloo

  • Wilma, temperamental and overworked, had let it become a kind of monomania with her.

    A Busy Year at the Old Squire's

  • There are grounds, however, for doubting whether Shelley was not subject to a kind of monomania upon this and similar points.

    A Dish of Orts : Chiefly Papers on the Imagination, and on Shakespeare

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