/ Dictionary / Index V Valium: Meaning and Definition of Find definitions for: Val•i•um Pronunciation: (val'ē-um), [key] — Pharm., Trademark. Pharm.,Trademark. a brand of diazepam. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: valium (Thesaurus) valise Valkyrie Related Content Daily Word Quiz: banshee Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language