What is "portents"

Usage examples of "portents".

Again I thought of leaving the carnival and finding a place where the omens and portents were less disturbing.

A service was currently in progress beneath a star-filled sky, which also bore two signs and several portents shining brightly at midheaven.

We needed to feel good, not merely to forget that death in Dallas the previous November but to distract ourselves from the signs and portents of death and destruction which, day by day, were growing in number.