1The sudden appearance of a comet in the sky was seen as a portent of impending disaster by the ancient civilization.
2Is the recent surge in global temperatures a portent of the catastrophic consequences of climate change?
3The eerie, unsettling atmosphere in the abandoned mansion seemed a portent of the dark secrets that lay within its walls.
4Historians have interpreted the assassination of Archduke Franz Ferdinand as a portent of the devastating war that was to come.
5There is a sense in which the current economic downturn can be seen as a portent of a more profound shift in the global economic order.