/ Dictionary / Index E enthusiast: Meaning and Definition of Find definitions for: en•thu•si•ast Pronunciation: (en-th'zē-ast", -ist), [key] — n. a person who is filled with enthusiasm for some principle, pursuit, etc.; a person of ardent zeal: a sports enthusiast. a religious visionary or fanatic. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: enthusiast (Thesaurus) enthusiasm enthusiastic Related Content Daily Word Quiz: neologism Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language