† necessaire,a.Obs.rare. [a. F. nécessaire (13th c.), ad. L. necessārius.] Necessary. c1374Chaucer Troylus iv. 1021 Al seme it not ther-by That prescience put falling necessaire To thing to come.1390Gower Conf. III. 135 Which is a thing full necessaire To contrepeise the balance.