Pronunciation: (en-thOO'zē-az"um), [key]
1. absorbing or controlling possession of the mind by any interest or pursuit; lively interest: He shows marked enthusiasm for his studies.
2. an occupation, activity, or pursuit in which such interest is shown: Hunting is his latest enthusiasm.
3. any of various forms of extreme religious devotion, usually associated with intense emotionalism and a break with orthodoxy.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.