Has it ever happened to you that you are dreaming in your sleep and suddenly the knowledge dawns on you that you are dreaming? That is, you understand that it’s a dream. May be you have felt it for some fleeting moments before waking up or it may also be that you have never experienced anything like this before. Whatever the case may be, this is what is known as lucid dreaming, where you know that you are dreaming and are fully conscious about it.