Dream meaning of disguise
To dream that you are in a disguise indicates that you are hiding from something or someone in your waking life. It is time to face reality and stop hiding behind a facade. Alternatively, the dream suggests that you are being someone you are not.

Disguise—or rather, ‘transvestism’—finds its basis in the wearing of clothes belonging to the opposite sex. According to Eliade, this is a rite which is analogous to the symbolism of the orgy and frequently practised in it. Its purport is to resuscitate the hypothetical, primordial, androgynous being referred to by Plato in his Dialogues.
You are considering some devious plan or unethical course of action if your dream featured others in disguise; better reconsider carefully, as you could be seriously embarrassed, if not actually damaged, by treachery from your associates in the matter. If you were yourself disguised, you are being warned against a tendency to be oversecretive. Try talking over your worries with a trusted friend.
If you put on a disguise in your dream, you are hiding something or pretending to be someone you aren’t in some area of your waking life. This may be for your benefit if the dream is fun and interesting, or it may be because you feel you have no other choice if the dream is anxious, guilty, or fearful. If you dream of someone else in a disguise, somebody is not who they pretend to be or someone is lying to you, and you can sense it.