Definition of glum :
1. Moody; silent; sullen.
2. showing a brooding ill humor; " a dark scowl"; " the proverbially dour New England Puritan"; " a glum, hopeless shrug"; " he sat in moody silence"; " a morose and unsociable manner"; " a saturnine, almost misanthropic young genius"- Bruce Bliven; " a sour temper"; " a sullen crowd"
4. To look sullen; to be of a sour countenance; to be glum.
heavy, drear, dire, lonesome, darkening, dark-skinned, saturnine, lonely, unyielding, tenacious, down in the mouth, drab, down, dingy, murky, pouting, persistent, black, Cimmerian, light, heavyhearted, benighted, obscure, chill, morbid, unhappy, off, funereal, depressive, depressing, ill-natured, cloudy, woebegone, threatening, non-white, melancholic, heartsore, hangdog, elegiac, desolate, doleful, downcast, wretched, low-spirited, sepulchral, saddened, pouty, off-key, forbidding, somber, godforsaken, sorrowful, sorry, tenebrous, gray, plutonian, crestfallen, subdued, brokenhearted, lowering, temperamental, cold, dogged, false, comfortless, happy, solemn, droopy, sinister, inconsolable, cast down, low, homesick, tenebrific, dreich, sunless, turned, lugubrious, rancid, bad, mopey, heartsick, coloured, pertinacious
dejected (part of speech: adjective)
contemplative, discouraged, disconsolate, heartbroken, dejected, anxious, downhearted, woeful, joyless, gloomy, melancholy, sullen, despondent, dreary, depressed, disheartened, overcome, grim, mournful, despairing, moody, anguished, lachrymose, morose, plaintive, wistful, sad, blue, miserable, pensive, dispirited, dolorous
sullen (part of speech: adjective)
contrary, dour, dissociable, long-faced, crabby, broody, grouchy, unsociable, malevolent, hostile, moping, unfriendly, dark, grumpy, cross, fretful, sour, irascible, scowling, cynical, obstinate, beetle-browed, mean, petulant, surly, ungenial, uncooperative, cantankerous, noncooperative, sulky, frowning, glowering
hopeless (part of speech: adjective)
- This seemed an agreeable arrangement for every one but Britton, who looked so glum that I, glad of the excuse, offered to help him. - "A Fool and His Money", George Barr McCutcheon.
- But Nell laughed and jested, flinging back at me now and again a look that mocked my glum face and declared her keen pleasure in my perplexity and her scorn of Barbara's shame. - "Simon Dale", Anthony Hope.
- You look as glum as a Jesuit in Lent. - "Helmet of Navarre", Bertha Runkle.