om·i·nous (m-ns)
adj.
1. Menacing; threatening: ominous black clouds; ominous rumblings of discontent.
2. Of or being an omen, especially an evil one.
[Latin minsus, from men, min-, omen.]
omi·nous·ly adv.
omi·nous·ness n.
The American Heritage® Dictionary of the English Language, Fourth Edition copyright ©2000 by Houghton Mifflin Company. Updated in 2011. Published by Houghton Mifflin Company. All rights reserved.