holy Copy link • holy: sanctus (in class. Lat., consecrated, pure; and of moral character, irreproachable, conscientious: q. v.): the Holy Spirit, s. Spiritus, Vulg. (pass.): Eccles. Scr.: be ye h., for I am h., s. eritis, quoniam ego s. sum, Vulg. 1 Pet. 1, 16: v. sacred. H. water, perh. aqua lustralis, Ov. Pont. 3, 2, 73.