/ Dictionary / Index F Firbolg: Meaning and Definition of Find definitions for: Fir•bolg Pronunciation: (fēr'bul-ug), [key] — pl. -bolgs, -bolg. any member of a pre-Celtic race from Greece who were first defeated by the Fomorians and ousted by the Tuatha De Danann. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. fir Firdausi 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