To dream that you are dressed in someone else’s clothes represents your admiration for that person. You are trying to incorporate aspects of that person into your own self.
To dream that you are dressing up suggests that you need to be more confident in your abilities and proud of your achievements.
To dream that you are having trouble getting dressed indicates that someone is trying to cause you problems and give you stress in your waking life.
To dream that you are dressed in white indicates longevity, good health or purity. You are trying to appear innocent to others.