Available Definitions:
1) a. - Arrogant; haughty.
2) a. - Gloomily morose; ill-natured, abrupt, and rude; severe; sour; crabbed; rough; sullen; gloomy; as, a surly groom; a surly dog; surly language; a surly look.
3) a. - Rough; dark; tempestuous.