Dictionary
en•thu•si•ast
Pronunciation: (en-thOO'zē-ast", -ist), [key]—
n.
1. a person who is filled with enthusiasm for some principle, pursuit, etc.; a person of ardent zeal:
a sports enthusiast.
2. a religious visionary or fanatic.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.