/ Dictionary / Index I isopropyl: Meaning and Definition of Find definitions for: i•so•pro•pyl Pronunciation: (ī"su-prō'pil), [key] — adj. Chem. containing the isopropyl group. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. isopropanol isopropyl alcohol Related Content Daily Word Quiz: simian Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language