If you have a dream where the central problem is a concept rather than an actual symbol which can be translated into a noun of some kind then this means that your interpretation is halfway done. Either you were looking into the dream and came up with the main idea of it yourself from the symbols that you saw were present, or you could just tell from the mood of the whole thing, but however you came to the conclusion as to what concept your dream represents, you now know what it is about basically, interpretation is basically done for you.
If you have a dream about disappointment, as stated above, you should basically know what the dream is about already. To dream about disappointment as a concept means that in real life you are disappointed with something. You feel like there is something in your life which could be going better or someone in your life who could be trying harder. You are slightly disappointed with the way things are going and you wish you could change them. In fact if you have a dream about disappointment and you can remember what it was you were disappointed with in your dream then you can basically glean how that specific thing relates to your daily life. There is a reason you are dreaming of this particular thing and why it is showing up here for you now.
If you have a dream about disapproval then this means that you feel like you need the approval of someone else. You wish that you could get into their lives and they could tell you want you need to do, and then you could just do it. It must be frustrating to know that you can’t meet the expectations of someone no matter how hard you try and you end up embarrassing yourself. Try to make sure that you gain their approval from now on.
If you have a dream about a disagreement then this could be because you are in the middle of a dispute or disagreement with someone that you know in real life or it could mean that you are in a disagreement with yourself about something. You are fighting your feelings on a certain subject and trying to figure out what it all means to you and how your opinion differs now on a subject from what it once was.