fa·tal/`fetḷ; ˈfeɪtl/ adj 1 resulting in someone's death 致命的: Meningitis can often be fatal. 脑膜炎常常会致命。 fatal accident/injury/illness etc a fatal heart attack 致命的心脏病发作 2 having a very bad effect 灾难性的，毁灭性的: fatal mistake Her fatal mistake was to marry the wrong man. 她的大错就是嫁错了人。