Meditation is holistic relaxation excercises.
Since civilized societies began to emerge, meditation has evolved into a structured practice. Although there is not a lot of recorded information dealing with the history of meditation, its roots can be traced back to ancient times.
Some meditation experts suggest thinking of your mind as a glass of muddy water and meditation helps bring clarity. Many forms of meditation result in the clearing of one’s mind.
More on Meditation – http://www.religious-beliefs.com/meditation.htm