adj heavy; dull; sluggish.
2. sullen ·adj obstinate; intractable.
3. sullen ·adj gloomy; dismal; foreboding.
4. sullen ·adj lonely; solitary; desolate.
5. sullen ·vt to make sullen or sluggish.
6. sullen ·adj mischievous; malignant; unpropitious.
7. sullen ·noun one who is solitary, or lives alone; a hermit.
8. sullen ·noun sullen feelings or manners; sulks; moroseness; as, to have the sullens.
9. sullen ·adj gloomily angry and silent; cross; sour; affected with ill humor; morose.