To see a circle in your dream symbolises perfection, completeness, immortality and/or wholeness. On a less positive note, it may also mean that you are going around in circles in some situation. Or the circle can indicate monotony and endless repetition.
To see circles within circles in your dream indicate that you are well protected or that you are being overly guarded. You may need to let down your defenses. Alternatively, the dream may highlight the notion that you are going around in a vicious circle. You need to somehow find a way to break this circle.
To see an imperfect or incomplete circle in your dream suggests that you will face many obstacles and setbacks toward achieving your goals. You need to work on your inner self and develop more knowledge. Eventually, you will overcome these obstacles and find that your struggles are well worth it.
To see a circle with a cross symbolises earth. It may also serve as guidance toward the center and self-orientation.