/ Dictionary / Index I I.O.O.F.: Meaning and Definition of Find definitions for: I.O.O.F. Pronunciation: [key] Independent Order of Odd Fellows. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. iontophoresis -ior Related Content Daily Word Quiz: secular Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language