/ Dictionary / Index I isopropyl alcohol: Meaning and Definition of Find definitions for: i'sopro'pyl al'cohol Pronunciation: [key] — Chem. Chem. a colorless, flammable, water-soluble liquid, CHO, produced from propylene by the action of sulfuric acid and hydrolysis: used chiefly in the manufacture of antifreeze and rubbing alcohol and as a solvent. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. isopropyl isopropylbenzene 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