Showing a brooding ill humor or silent resentment; morose or sulky.(adjective)
Gloomy or somber in tone, color, or portent: sullen, gray skies. (adjective)
Sluggish; slow: the sullen current of a canal. (adjective)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "sullen" in a sentence
"“I am afraid not,” Rysatam replied, his expression sullen."
"For Nau-hau, in sullen volcanic rage, was ripe to erupt at the slightest opportunity."
"During all this work the sealers stood about in sullen groups."