[necessary condition] n (1817) 1: a proposition whose falsity assures the falsity of another
2: a state of affairs that must prevail if another is to occur: prerequisite
[necessary condition] n (1817) 1: a proposition whose falsity assures the falsity of another
2: a state of affairs that must prevail if another is to occur: prerequisite
Merriam-Webster English vocab. Английский словарь Merriam Webster. 2012