Definition of fatal
1a : causing death
a fatal crash a fatal disease a fatal wound
b : bringing ruin
a fatal attraction to gambling
c : causing failure
a fatal design flaw Lack of sufficient support was fatal to his campaign.
2a : determining one's fate
the fatal flaw in this dazzling woman: a total lack of taste— Marya Mannes
b : of or relating to fate
… this science sets a fatal necessity on things …— H. O. Taylor
c : resembling fate in proceeding according to a fixed sequence
3 : fateful a fatal hour
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Time Traveler for fatal
The first known use of fatal was in the 14th century
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