Meaning of NECESSARY in English

adj. 1 indispensable, essential, required, needed, compulsory, requisite, vital, demanded, imperative, obligatory, needful, of the essence, important, of the utmost importance, top-priority, high-priority, urgent, exigent, compelling, life-and-death or life-or-death A good diet is necessary for good health It is necessary that you come at once. Take the necessary steps to get the job done. 2 inevitable, unavoidable, inescapable, ineluctable In the circumstances, we find it necessary to ask for your resignation 3 sure, certain, predetermined, predestined, fated, inexorable; resulting, resultant The necessary outcome of the affair was that the child was returned to her natural parents

n. 4 See necessity, 1, below.

Oxford thesaurus English vocab.      Английский словарь Оксфорд тезаурус.