/ Dictionary / Index I illegal procedure: Meaning and Definition of Find definitions for: ille'gal proce'dure Pronunciation: [key] — Football. Football. a penalty assessed against the offensive team for a technical rules violation, as in assuming an illegal formation. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. illegalize illegible 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