1. [ adjective ] having momentous consequences; of decisive importance
Synonyms: fatal

"that fateful meeting of the U.N. when...it declared war on North Korea"- Saturday Rev "the fatal day of the election finally arrived"

Related terms: decisive
2. [ adjective ] of ominous significance
Synonyms: portentous foreboding
Related terms: prophetic
3. [ adjective ] (of events) having extremely unfortunate or dire consequences; bringing ruin
Synonyms: disastrous black fatal calamitous

"the stock market crashed on Black Friday" "a calamitous defeat" "a disastrous end to a disastrous campaign" "this would be absolutely fatal to my theory"

Related terms: unfortunate
4. [ adjective ] controlled or decreed by fate; predetermined
Synonyms: fatal

"a fatal series of events"

Related terms: inevitable
Similar spelling:   fatefully