Mawson, C.O.S., ed. (1870–1938). Roget’s International Thesaurus. 1922.
Class IV. Words Relating to the Intellectual FacultiesDivision (I) Formation of Ideas
Section VI. Extension of Thought
2. To the Future
512. Omen.
bird of ill omen; halcyon birds; signs of the times; gathering clouds, thunder, lightning, rainbow, comet, shooting star; rain of blood, warning [See Warning].
prefigurement [See Prediction]; adytum [See Prediction].