Roget's Thesaurus

#512. Omen

Nouns

omen, portent, presage, prognostic, augury, auspice; sign etc. (indication) 550; harbinger etc. (precursor) 64; yule candle. bird of ill omen; signs of the times; gathering clouds; warning etc. 668. prefigurement etc. 511.

Adjectives

ill-boding.

Phrases

auspicium melioris aevi [Lat.].