Definitions

1. adjective

having or showing a bad temper, especially in a sulky or sullen manner

“She was sulky with her brother for taking her toy.”

2. adjective

having a sulky or sullen air; sulky-looking

“The sulky child sat in the corner, not speaking to anyone.”

3. noun

a horse used for driving a sulky, especially in harness racing

“The jockey rode a sulky with a strong, fast horse.”