'Sulky' definitions:

Definition of 'sulky'

adjective

Sullen or moody [syn: huffish, sulky]

adjective

Moving slowly; "a sluggish stream" [syn: sluggish, sulky]

adjective

Depressingly dark; "the gloomy forest"; "the glooming interior of an old inn"; "`gloomful' is archaic" [syn: glooming, gloomy, gloomful, sulky]

noun

A light two-wheeled vehicle for one person; drawn by one horse

From: GCIDE

Sulky \Sulk"y\, a. [Compar. Sulkier; superl. Sulkiest.] [See Sulkiness, and cf. Sulky, n.] Moodly silent; sullen; sour; obstinate; morose; splenetic. [1913 Webster]
Syn: See Sullen. [1913 Webster]

From: GCIDE

Sulky \Sulk"y\, n.; pl. Sulkies. [From Sulky, a.; -- so called from the owner's desire of riding alone.] A light two-wheeled carriage for a single person. [1913 Webster]
Note: Sulky is used adjectively in the names of several agricultural machines drawn by horses to denote that the machine is provided with wheels and a seat for the driver; as, sulky plow; sulky harrow; sulky rake, etc. [1913 Webster]