GNU Collaborative International Dictionary of English

last match results

Found one definition

1.       
   Grum , a. [Cf. Dan. grum furious, Sw. grym, AS. gram, and E. grim, and grumble. √35.]
    Morose; severe of countenance; sour; surly; glum; grim. “Nick looked sour and grum.”
   Arbuthnof.
   
   1913 Webster
   Low; deep in the throat; guttural; rumbling; as, a grum voice.
   1913 Webster