Definition of "sullenness"

sullenness

noun
countable and uncountable, plural sullennesses
1. (uncountable) The state or quality of being sullen.
  Quotations
  “Marry come up—are you there with your bears?” muttered the dragon, with a draconic sullenness, which was in good keeping with his character, “we had as good have been Romans still, if we are to have no freedom in our pastimes!”
  1820, [Walter Scott], chapter XV, in The Abbot. […], volume I, Edinburgh: […] [James Ballantyne & Co.] for Longman, Hurst, Rees, Orme, and Brown, […]; and for Archibald Constable and Company, and John Ballantyne, […], page 323
  ’Twas sunset: when the sun will partThere comes a sullenness of heartTo him who still would look uponThe glory of the summer sun.
  1829, Edgar Allan Poe, “Tamerlane”, in Al Aaraaf, Tamerlane and Minor Poems
2. (countable, rare) The result or product of being sullen.