adv.
Function: adverb
Date: 15th century
1 : in a way determined by fate
2 : in a manner suggesting fate or an act of fate: as a : in a manner resulting in death : MORTALLY < fatally wounded> b : beyond repair : IRREVOCABLY c : in a manner resulting in ruin or evil <it is fatally easy to pass off our prejudices as our opinions ― W. F. Hambly> d : in a manner that cannot be easily resisted <thinks she is fatally attractive ― J. W. Krutch>