[noun] anything indispensable; "food and shelter are necessities of life"; "the essentials of the good life"; "allow farmers to buy their requirements under favorable conditions"; "a place where the requisites of water fuel and fodder can be obtained" Synonyms:necessity, requirement, requisite, necessary
[adjective] absolutely necessary; vitally necessary; "essential tools and materials"; "funds essential to the completion of the project"; "an indispensable worker" Synonyms:indispensable
[adjective] basic and fundamental; "the essential feature"
[adjective] of the greatest importance; "the all-important subject of disarmament"; "crucial information"; "in chess cool nerves are of the essence" Synonyms:all-important, all important, crucial, of the essence
[adjective] being or relating to or containing the essence of a plant etc; "essential oil"
[adjective] applying to essential legal principles and rules of right; "substantive law" Synonyms:substantive
[adjective] absolutely required and not to be used up or sacrificed