Pronunciation: (mon"u-mā'nē-u, -mān'yu), [key]
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.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.