| adjective | having momentous consequences; of decisive importance; - Saturday Rev “that fateful meeting of the U.N. when...it declared war on North Korea” |
| adjective | ominously prophetic |
| adjective | (of events) having extremely unfortunate or dire consequences; bringing ruin; ; ; ; - Charles Darwin; - Douglas MacArthur “the stock market crashed on Black Friday” |
| adjective | controlled or decreed by fate; predetermined “a fatal series of events” |
| portent | noun | a sign of something about to happen |
| calamity | noun | an event resulting in great loss and misfortune |
| disaster | noun | an event resulting in great loss and misfortune |