Definition of "stygian" [styg•i•an]

• Gloomy and dark. (adjective)
• Infernal; hellish. (adjective)
• Of or relating to the river Styx. (adjective)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "Too many words Kevin, too many adjectives chased down the 'stygian' gloom of your thought processes."
• "Entrances and exits were random, James F. Ingalls's lighting was mostly stygian and occasionally lurid, and several important interactions were staged entirely out of the light."
• "I leap from the side of the bridge down toward the stygian water, which hurtles up to meet me."