postulancy|ˈpɒstjʊlənsɪ| [f. postulant: see -ancy.] The condition of being a postulant; the period during which this lasts. 1882–3Schaff's Encycl.Relig.Knowl. II. 1476 Those who would enter either class undergo a postulancy of six months.1884Weekly Reg. 18 Oct. 504/2 Two years make a long postulancy.