Look up: ominous

1. ominous
   threatening 
   Found on http://www.graduateshotline.com/list.htm
   
   
2. Ominous
   Om'i·nous adjective [ Latin ominosus , from omen . See Omen .] Of or pertaining to an omen or to omens; being or exhibiting an omen; significant; portentous; -- formerly used both in a favorable and unfavorable sense; now chiefly in ...
   Found on http://www.encyclo.co.uk/webster/O/18
   
   
3. ominous
   Of or pertaining to an omen or to omens; being or exhibiting an omen; significant; portentous; formerly used both in a favorable and unfavorable sense; now chiefly in the latter; foreboding or foreshowing evil; inauspicious; as, an ominous dread. 'He had a good ominous name to have made a peace.' (B...
   Found on http://www.mondofacto.com/facts/dictiona
   
   
4. Ominous
   • (a.) Of or pertaining to an omen or to omens; being or exhibiting an omen; significant; portentous; -- formerly used both in a favorable and unfavorable sense; now chiefly in the latter; foreboding or foreshowing evil; inauspicious; as, an ominous dread.
   Found on http://thinkexist.com/dictionary/meaning
   
   
5. ominous
   ominous 1. Portending evil or harm; foreboding; threatening; inauspicious: 'She saw an ominous bank of dark clouds.' 2. Having the significance of an omen.
   Found on http://www.wordinfo.info/words/index/inf