This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

adj. Moody and melancholy; dejected.

adj. Gloomy; dismal.

n. The quality or state of being moody, melancholy, and gloomy or an instance of it: "He was a charming mixture of glum and glee” ( Lillian Hellman).

n. Chiefly British The blues. Often used with the: "Most other publications have got the glums” ( Tina Brown).

v. To look sullen; to be of a sour countenance; to be glum.

adj. Sad, despondent.

n. Sullenness.

adj. Moody; silent; sullen.

verb-intransitive. To look sullen; to be of a sour countenance; to be glum.

To frown; look sullen or glum: same as gloom.

Gloomily sullen or silent; moody; frowning.

n. A sullen look; a frown.

adj. showing a brooding ill humor

adj. moody and melancholic

"It's very hard to remain glum in the face of very high quality dark chocolate-covered caramel."

ill-natured    dejected   

glummer    glummest   

sullenness    moody    silent    sullen    depressed   

Brum    Krum    Mum    alum    become    brum    bum    chum    clum    come   

morose    dour    disapprove    surly    sheepish    somber    despondent    reticent    sorrowful    sullen