/ Dictionary / Index I I formation: Meaning and Definition of Find definitions for: I formation Pronunciation: (ī), [key] — Football. Football. an offensive alignment in which the backs are positioned in line directly behind the quarterback. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Ifni -iformes 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