(1):
(n.) 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.
(2):
(n.) External appearance in manner or dress; appropriate indication or expression; garb; shape.
(3):
(n.) Cover; cloak; as, under the guise of patriotism.