[ mon-uh-mey-nee-uh, -meyn-yuh ]
See synonyms for: monomaniamonomaniacalmonomaniac on

  1. (no longer in technical use) a psychosis characterized by thoughts confined to one idea or group of ideas.

  2. 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

Other words from monomania

  • mon·o·ma·ni·ac [mon-uh-mey-nee-ak], /ˌmɒn əˈmeɪ niˌæk/, noun
  • mon·o·ma·ni·a·cal [mon-uh-muh-nahy-uh-kuhl], /ˌmɒn ə məˈnaɪ ə kəl/, adjective Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use monomania in a sentence

  • Each of them had his monomania; and the two monomaniac suited each other perfectly.

  • Even today tens of thousands of educated men regard him as a monomaniac concerning the abolition of slavery.

  • Hunted and hated in two worlds, Hradzka dreamed of a monomaniac's glory, stranded in the past with his knowledge of the future.

    Flight From Tomorrow | Henry Beam Piper
  • Sleeping or waking it was the same, wherever he looked those sad eyes met his; there was no escape; he was becoming a monomaniac.

    The Arab's Pledge | Edward L. Mitford
  • Of course no one not a monomaniac would so entirely ignore your side, would conceive so strange an idea.

    The Squirrel-Cage | Dorothy Canfield

British Dictionary definitions for monomania


/ (ˌmɒnəʊˈmeɪnɪə) /

  1. an excessive mental preoccupation with one thing, idea, etc

Derived forms of monomania

  • 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