fatal Definition

fatal
adj

1. Causing death; deadly.

Example: a fatal injury
Thesaurus: deadly, lethal, mortal, terminal, incurable, malignant, pernicious ; Antonym: harmless.
2. Bringing ruin; disastrous.

Thesaurus: destructive, catastrophic, pernicious, calamitous.
3. Decisive; critical.
4. Destined; unavoidable.

Derivative: fatally
adverb

Etymology: 14c in the sense ‘alloted or decreed by fate': from Latin fatalis, from fatum fate.