monomaniac

Variant of monomania

noun

  1. an excessive interest in or enthusiasm for some one thing; craze
  2. a mental disorder characterized by irrational preoccupation with one subject

Origin: ModL: see mono- & mania

Related Forms:

Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.
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