WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
adjective.
threatening or foreshadowing evil or tragic developments
adjective.
deadly or sinister
Word Usage
"If I do not succeed in getting Dionea this place (and all your Excellency's illustriousness and all my poor eloquence will be needed to counteract the sinister reports attaching to our poor little waif), it will be best to accept your suggestion of taking the girl into your household at Rome, since you are curious to see what you call our baleful beauty."