|  | 
Definition of Grum
1. a. Morose; severe of countenance; sour; surly; glum; grim.
Definition of Grum
1. morose [adj GRUMMER, GRUMMEST] - See also: morose
|  | 
1. a. Morose; severe of countenance; sour; surly; glum; grim.
1. morose [adj GRUMMER, GRUMMEST] - See also: morose