The dictionary meaning of dreams: 'a stream of thoughts and images in sleep'.
Every dream interpretation is different but the meanings are basically from the same grounding. Some of us dream regularly (everytime we go to sleep), while others may dream very infrequently. There are even those times when we awake and cannot remember if we had a dream or not. As dreams are subject to a wide variety of interpretation, there is a belief that dreams can be prophetic and tell the future.