| Grum 1. (a.) Morose; severe of countenance; sour; surly; glum; grim. 2. (a.) Low; deep in the throat; guttural; rumbling; as, Thesaurus Entries beetle-browed, black, black-browed, brooding, broody, chapfallen, crestfallen, dark, dejected, dour, dumpish, frowning, glowering, glum, grim, long-faced, lowering, melancholy, moodish, moody, mopey, moping, mopish, morose, mumpish, scowling, sulky, sullen, surly |