What is Fatal?

Fatal definition and meaning on Dictionary terms:

causing or capable of causing death; mortal; deadly: a fatal accident; a fatal dose of poison.
causing destruction, misfortune, ruin, or failure: The withdrawal of funds was fatal to the project.
decisively important; fateful: The fatal day finally arrived.
proceeding from or decreed by fate; inevitable: a fatal series of events.
influencing or concerned with fate; fatalistic.
Obsolete. doomed.
Obsolete. prophetic.