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English definition of “glum”

glum

adjective     /ɡlʌm/ (glummer, glummest) informal
disappointed or unhappy, and quiet: You look glum. What's up? He's very glum about the company's prospects.Feeling sad and unhappyNot hopeful If a place is glum, it is not attractive and has nothing that causes pleasure: They live in one glum little room.Not attractive to look atSerious and unpleasant glumly     /ˈɡlʌm.li/ adverb "I'll never find another job at my age," she said glumly.Feeling sad and unhappyNot hopeful glumness     /ˈɡlʌm.nəs/ noun [U] Sadness and regret
(Definition of glum adjective from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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