Definition of "sullenly"

Sullenly, jocularly, resentfully, or derisively, names and addresses were extorted from the company, and each member given a jerk of the head to get out of this.

1938, Norman Lindsay, Age of Consent, 1st Australian edition, Sydney, N.S.W.: Ure Smith, published 1962, page 160

Sullenly they paid what was asked, sullenly left, Hamzah feigning a kick at the glass showcase filled with loaves and Chinese cakes.

1959, Anthony Burgess, Beds in the East (The Malayan Trilogy), published 1972