/ Dictionary / Index D Demerol: Meaning and Definition of Find definitions for: Dem•e•rol Pronunciation: (dem'u-rôl", -rol"), [key] — Pharm., Trademark. Pharm.,Trademark. a brand of meperidine. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: demerol (Thesaurus) demerit demesne Related Content Daily Word Quiz: diligent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language