/ Dictionary / Index L laudanum: Meaning and Definition of Find definitions for: lau•da•num Pronunciation: (lôd'n-um, lôd'num), [key] — n. a tincture of opium. any preparation in which opium is the chief ingredient. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: laudanum (Thesaurus) laudable laudation Related Content Daily Word Quiz: arboreal Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language