/ Dictionary / Index F fireballer: Meaning and Definition of Find definitions for: fire•ball•er Pronunciation: (fīr'bô"lur), [key] — n. Baseball Slang. a hard-throwing fastball pitcher. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. fireball fire balloon Related Content Daily Word Quiz: panacea Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language