C2worried and serious or sad: Her face was grim as she told them the bad news.The expression on his face was one of grim determination.Later Mr Ashby left the court, grim-faced and silent.Feeling sad and unhappyAnxious and worriedgrimly
/ˈɡrɪm.li/adverbgrimness
/ˈɡrɪm.nəs/noun[U]Serious and unpleasantNot attractive to look atInformal words for badNot hopeful