Necessary Nec"es*sa*ry, a. [L. necessarius, from necesse unavoidable, necessary; of uncertain origin: cf. F. n['e]cessaire.] 1. Such as must be; impossible to be otherwise; not to be avoided; inevitable. [1913 Webster]

Death, a necessary end, Will come when it will come. --Shak. [1913 Webster]

2. Impossible to be otherwise, or to be dispensed with, without preventing the attainment of a desired result; indispensable; requisite; essential. ``'T is necessary he should die.'' --Shak. [1913 Webster]

A certain kind of temper is necessary to the pleasure and quiet of our minds. --Tillotson. [1913 Webster]

3. Acting from necessity or compulsion; involuntary; -- opposed to {free}; as, whether man is a necessary or a free agent is a question much discussed. [1913 Webster]

The Collaborative International Dictionary of English. 2000.