1. past tense and past participle of 'guise'; dressed up in a costume or disguise
Usage: chiefly Scottish and Northern English; often used in the context of Halloween or seasonal celebrations

Examples

• The children guised as witches and ghosts for Halloween.
• She guised herself in an elaborate costume for the masquerade ball.
• They guised up in old clothes and went trick-or-treating.
• He guised as a pirate for the costume party.
• The performers guised in traditional outfits for the festival.