Part of speech:
Vital to the resolution of a crisis or the determination of an outcome:
Extremely important or essential:
The definition of important is having great significance or consequence.
Find another word for life-or-death. In this page you can discover 6 synonyms, antonyms, idiomatic expressions, and related words for life-or-death, like: decisive, crucial, necessary, critical, important and life-and-death.