Someone who is glum is sad and quiet because they are disappointed or unhappy about something. She was very glum and was obviously missing her children. = despondent + glumly glum·ly When Eleanor returned, I was still sitting glumly on the settee. if someone is glum, they feel unhappy and do not talk a lot = gloomy (glum (15-19 centuries), from gloom)
showing a brooding ill humor; "a dark scowl"; "the (Atasözü)ially 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"