Definitions
1.nounCustomary way of speaking or acting; fashion, manner, practice (often used formerly in such phrases as "at his own guise"; that is, in his own fashion, to suit himself.)
2.nounExternal appearance in manner or dress; appropriate indication or expression; garb; shape.
3.nounMisleading appearance; cover, cloak."Under the guise of patriotism"
4.verbTo dress.
5.verbTo act as a guiser; to go dressed up in a parade etc.