/ Dictionary / Index F F.L.B.: Meaning and Definition of Find definitions for: F.L.B. Pronunciation: [key] Federal Land Bank. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. F layer fld. 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