CentralNotice From Wikipedia, the free encyclopedia Jump to: navigation , search For other uses, see Omen (disambiguation) . This article needs additional citations for verification . Please help improve this article by adding citations to reliable sources . Unsourced material may be challenged and removed. (April 2008) ( Learn how and when to remove this template message ) Examples of omens from the Nuremberg Chronicle (1493): natural phenomena and unnatural births. Manuscript of the mid-nineteenth century, possibly of Sgaw Karen origin, shows various appearances in the sun, the moon, clouds, etc., and indicates the primarily bad omens these appearances foretell. Explanations in English were added to this manuscript by a nineteenth-century American missionary [1] An omen (also called portent or presage ) is a phenomenon that is believed to foretel...