Meaning of NECESSARY in English

I. adjective see: no Date: 14th century 1. of an inevitable nature ; inescapable , b. logically unavoidable, that cannot be denied without contradiction, determined or produced by the previous condition of things, compulsory , absolutely needed ; required, II. noun (plural -saries) Date: 14th century an indispensable item ; essential

Merriam Webster. Explanatory English dictionary Merriam Webster.      Толковый словарь английского языка Мерриам-Уэбстер.