Proceeding from, or appointed by, fate or destiny; necessary; inevitable.

Causing death or destruction; deadly; mortal; destructive; calamitous; as, a fatal wound; a fatal disease; a fatal day; a fatal error.

Describes an error condition that stops the current process.

having momentous consequences; of decisive importance; "that fateful meeting of the U.N. when...it declared war on North Korea"- Saturday Rev; "the fatal day of the election finally arrived"

Foreboding death or great disaster.

bringing death

1. Acting in a way that leads to death. 2. Drinking (and using), if done repeatedly or to excess.

causing or capable of causing death