The meaning of seeing a cactus in your dream is that you feel invaded, like your space is crowded and that you will suffocate. The cactus' spines are the limit that you are trying to establish between personal and private environment. Or you feel the need to defend yourself somehow. On the other hand, the dream's interpretation might be that that you are stuck in a situation. Maybe you need to adapt to existing circumstances, instead of trying to change them.
You may look in dreams interpretation for other symbols :
Caesarian_operation : The dream's interpretation of being in a caesarian operation is that need help in order to promote your idea or project. You can't succeed alone. A more direct ... _operation.html">
Cage : The meaning of dreaming that you are in a cage is that you are dealing with inhibitions and helplessness in some areas of your life. You feel limited and ...