To dream of winning the lottery might mean that you can do more with your life than you are doing now. You have potential but aren't reaching it.
If you win the lottery in a dream, it can indicate an end to your financial problems- if you have any in your waking hours. However if you won a lot less than you bargained for, then it could mean that you still have issues where money is concerned.
To play, win, lose or see someone else play the lottery is all to do with the risks you take in your own life, the luck that befalls you and the chances you take while you're awake. Perhaps you need to look at all aspects of your life and consider what needs improving; a small change could result in a large profit.
If you feel like you lost out, perhaps you foresee losing or being disappointed in your future. Maybe you have entered into a risky decision and you worry that the result might be bad. It could also be your unconscious telling you that your aspirations are unrealistic and you need to bring them down a peg or two to make them more achievable or you could land yourself in trouble.
Another interpretation is that you are having problems with your lover at present- the disappointment might be linked to how you feel about their actions, your reactions to them or your relationship as a whole. Perhaps you are disappointed in yourself for not moving on sooner.
As you played the lottery in your dream, this can symbolise your reliance on fate rather than taking control of your own actions. You may not feel comfortable or confident enough to make them yourself. Perhaps you need to sit down and think through an upcoming situation before you jump right into it.
Most predictably, dreaming of winning the lottery is also about your desire to live without the stress of money issues.
Tagged in Dream Interpretation