/ Dictionary / Index L Librium: Meaning and Definition of Find definitions for: Lib•ri•um Pronunciation: (lib'rē-um), [key] — Pharm., Trademark. Pharm.,Trademark. a brand of chlordiazepoxide. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: librium (Thesaurus) libri Libya Related Content Daily Word Quiz: eureka Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language