Noun glumness has 2 senses
  1. gloom, gloominess, glumness - an atmosphere of depression and melancholy; "gloom pervaded the office"
    --1 is a kind of atmosphere, ambiance, ambience
    --1 has particulars: cloud; bleakness, desolation
  2. moroseness, glumness, sullenness - a gloomy ill-tempered feeling
    --2 is a kind of moodiness
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