Roget's Thesaurus of English Words and Phrases by Peter Mark Roget

512. Omen — N. omen, portent, presage, prognostic, augury, auspice;

sign &c (indication) 550; harbinger &c (precursor) 64; yule candle†. bird of ill omen; signs of the times; gathering clouds; warning &c 668. prefigurement &c 511. Adj. ill-boding. Phr. auspicium melioris aevi [Lat.].