When you see a roller coaster enter your dream as a dream symbol, this usually means that right off the bat, something in your life is going through changes. It could be you, it could be a friend, or it could be a few things. However, a roller coaster suggests that something has made a big change in your life, and as soon as you ride it, you are going to find out what those changes were. The meaning of dream about roller coasters will often tell you just what direction that you feel your life is going in. A dream dictionary will usually tell you that if you feel that you are going up higher inclines and down less steep drops, then for the most part, you are doing better than usual. However, if you are going down sharper drops and not doing as many inclines, this could be a sign that your life is getting worse.
Of course, dream meanings such as this can only be applied in a very loose sense. You cannot simply determine that someone's life is going bad or good based on the paths that the roller coaster takes in the dream. However, if the dreamer was able to come up with a list of things that had taken steep changes or relationships that had experienced ups and downs recently, then they might be able to get a good idea of what the roller coaster image relates to.
Dream interpretations agree that dream symbols usually directly relate to events that are occurring in the life of the dreamer. To this end, it makes sense to assume that if you have had a lot of ups and downs recently in your life, then a roller coaster would be a great way for your subconscious to express that. If you have been having erratic emotions lately, then one dream interpretation of a roller coaster might be that it exists to notify you of your constantly changing emotional state.
Yet another dream meaning of a roller coaster might be that the roller coaster is there to notify you of changes in your friendships or relationships. Have a partner that you have been on and off with, or a friend that has flaked on you too many times recently? Then this might be the reason that you are dreaming of roller coasters. A roller coaster can also be a message in your dreams about your successes. If you have been successful in life, then a roller coaster may remain at a steep incline for some time, but if you have not, then the roller coaster may be constantly plummeting. One important thing to note about this is that you should notice the people that are riding in the roller coaster with you. If there are people in the coaster that are significant to your life, then this may indicate an important message about these people. Stay alert for these details.