/ Dictionary / Index G glum: Meaning and Definition of Find definitions for: glum Pronunciation: (glum), [key] — glum•mer, glum•mest. sullenly or silently gloomy; dejected. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: glum (Thesaurus) glug glumaceous Related Content Daily Word Quiz: deleterious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language