/ Dictionary / Index F fl. oz.: Meaning and Definition of Find definitions for: fl. oz. Pronunciation: [key] fluid ounce; fluid ounces. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Floyd FLRA Related Content Daily Word Quiz: morose Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language