[ne.ces.si.ty] n, pl -ties [ME necessite, fr. MF necessite, fr. L necessitat-, necessitas, fr. necesse] (14c) 1: the quality or state of being necessary
2. a: pressure of circumstance b: physical or moral compulsion c: impossibility of a contrary order or condition
3: the quality or state of being in need; esp: poverty
4. a: something that is necessary: requirement b: an urgent need or desire -- of necessity : in such a way that it cannot be otherwise; also: as a necessary consequence