/ Dictionary / Index I I.F.S.: Meaning and Definition of Find definitions for: I.F.S. Pronunciation: [key] Irish Free State. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. -iformes Ifugao Related Content Daily Word Quiz: spectral Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language