Definition of "fatal" in English

adjective

1. (rare, archaic) Proceeding from, or appointed by, fate or destiny.

2. (rare, archaic) Foreboding death or great disaster.

3. Causing death or destruction.

   • a fatal wound; a fatal disease; that fatal day; a fatal mistake

4. (computing) Causing a sudden end to the running of a program.

   • a fatal error; a fatal exception

noun

1. A fatality; an event that leads to death.

2. (computing) A fatal error; a failure that causes a program to terminate.