/ Dictionary / Index I iron-on: Meaning and Definition of Find definitions for: i•ron-on Pronunciation: (ī'urn-on", -ôn"), [key] — adj. designed to be applied with heat and pressure, as by an iron: an iron-on patch for pants. —n. a design, patch, or the like, applied by ironing on. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. iron monoxide iron oxide Related Content Daily Word Quiz: blanch Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language