装饰 (zhuāngshì) means 'to decorate' or 'decoration' in a general sense — adding ornamental items to things, rooms, or events. It differs from 装修 (zhuāngxiū, renovate with repairs/refits) and 装扮 (zhuāngbàn, dress up or disguise a person). As both a verb and noun, it covers everyday decorating.