There are many different theories on whether or not dreams actually mean something. Some people claim to have dreams that predict the future. For example, people have dreamt that they were pregnant, and then a few weeks later discovered that they were actually pregnant. Some say that these dreams are not psychic, due to the simple fact that the person could have been thinking about trying to conceive, which led to them unconsciously accessing that knowledge while sleeping.
Some people truly believed that they had psychic dreams about the Titanic sinking. Someone even had a date stamped letter which validated that they had that dream before the Titanic sunk. Does this prove that psychic dreams are real? According to Robert Todd Carroll, the answer is no. Carroll is a writer and retired academic, and is best known for his contributions in the field of skepticism. He claims that each person has an average of five dreams per night--multiply that by the amount of people in the world, and there is no way that someone won't coincidentally have a dream about a sinking ship on any given night.
In the beginning of my college career, I took a psychology class with an extremely intelligent and interesting professor, who was also a psychiatrist. One thing that I'll never forget about that class was his lesson about dreams. He claimed that every dream means something, and that he could discover certain things about some of his patients' lives--things that they had never told him-- solely based on their dreams. He truly made me believe that some dreams have a hidden meaning.