The definition of crucial is something that is essential or vitally important.
(Biochemistry) Being a substance that is required for normal functioning but cannot be synthesized by the body and therefore must be included in the diet:
Having high social rank or influence; prominent:
The definition of indispensable is essential or absolutely necessary.
Need is defined as to want, desire or require.
Of the greatest importance; crucial.
Designating or of important products or raw materials subject to increased production and restricted distribution under strict control, as in wartime
Related to the emergency or to the provision of assistance.
Find another word for life-and-death. In this page you can discover 19 synonyms, antonyms, idiomatic expressions, and related words for life-and-death, like: life-or-death, crucial, earth-shaking, earth-shattering, essential, important, indispensable, of vital importance, necessity, need and no laughing matter.