Read the dictionary definition of glum. All definitions for this word.
1. moody and melancholic
2. showing a brooding ill humor
1. a dark scowl
2. the proverbially dour New England Puritan
3. a glum, hopeless shrug
4. he sat in moody silence
5. a morose and unsociable manner
6. a saturnine, almost misanthropic young genius
7. a sour temper
8. a sullen crowd