From The Collaborative International Dictionary of English v.0.48 :
Sulk \Sulk\, n. [L. sulcus.]
A furrow. [Obs.]
[1913 Webster]
From The Collaborative International Dictionary of English v.0.48 :
Sulk \Sulk\, v. i. [See Sulkiness.]
To be silently sullen; to be morose or obstinate. --T. Hook.
[1913 Webster]
From WordNet (r) 3.0 (2006) :
sulk
n 1: a mood or display of sullen aloofness or withdrawal;
"stayed home in a sulk" [syn: sulk, sulkiness]
v 1: be in a huff and display one's displeasure; "She is pouting
because she didn't get what she wanted" [syn: sulk,
pout, brood]