Of course there are a hundred different reasons that you might want to use a costume, but in the end all of these different uses basically apply to the same thing. You need a way of making sure that nobody notices your appearance, so you put them on and then you don’t have to be yourself anymore or you can go on looking like someone else to fool a person or a group of people. What do all of these costume traits have to do with the dream world of costumes though? Well, that will be discussed too.
As stated above, the only reason you would wear a costume is to disguise yourself in some way, but there are two primary ways that a costume can help you do that, and each one of them will have a different dream interpretation. If you have a dream in which you are wearing a costume then this could mean that you do not feel comfortable in your own skin. You are trying to hide yourself from someone else or from multiple people. In this kind of dream it rarely even matters what kind of costume you’re wearing. The point is you’re trying to be something that you’re not or trying to fool other people into thinking that you’re someone that you’re not just so that you don’t have to be yourself. This may work for some time in the real world, but sooner or later someone is going to find out who you are or someone is going to pinpoint your personality and by the time that happens, it will all be too late. You can’t hide yourself forever, so you might as well not try.
If you have a dream in which you are wearing a costume it could also be something even sadder than that. You could be wearing the costume in your dreams because you think that you need to be someone or something else in order to impress other people. You need to hide behind something else in order to really be who you want to be and it doesn’t work too well.
If you have a dream in which everyone else is wearing a costume except you, this is because you think that you are the only one that is really being real in your life at the moment. There are other people that are just not being true to themselves or true to you, at least as far as you can see. You are trying to be as open and honest as possible to help counteract that attitude, but your process is having mixed results at best. Maybe you should just don a costume too so then the world would really be at a balance.
The costume is a thing which people generally try to use to hide behind when they are embarrassed of themselves or ashamed of themselves. This is never a good thing and it is never a good attitude to have. If you think that you feel like you are hiding behind a costume then you need to come out from under it and show people your true nature.