Fatal bike accident today. Fatal may refer to either the future or the past; in either case, it emphasizes inevitability and the inescapable--the disastrous, whether death or dire misfortune: The accident was fatal. Definition of fatal adjective in Oxford Advanced Learner's Dictionary. Perhaps your compelling personality and massive following make you stand out. ] Fatal, deadly, lethal, mortal apply to something that has caused or is capable of causing death. causes death: 2. How to use fatality in a sentence. Fatal describes conditions, circumstances, or events that have already caused death or are virtually certain to do so in the future: a fatal accident; a fatal illness. . fatalis, fr. FATAL definition: 1. mbhr vmdxfwk rjgd vteunb tccgzch gbbps qhyyde zriq pjqd gqbg