/ Dictionary / Index F fcs.: Meaning and Definition of Find definitions for: fcs. Pronunciation: [key] francs. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: fcs (Thesaurus) fcp. fcy. Related Content Daily Word Quiz: resilient Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language