·noun Cover; cloak; as, under the guise of patriotism.
II. Guise ·noun External appearance in manner or dress; appropriate indication or expression; garb; shape.
III. Guise ·noun Customary way of speaking or acting; custom; fashion; manner; behavior; mien; mode; practice;
— often used formerly in such phrases as: at his own guise; that is, in his own fashion, to suit himself.