Meditation is Witnessing

Meditation starts by being separate from the mind, by being a witness. That is the only way of separating yourself from anything. If you are looking at the light, naturally one thing is certain: you are not the light, you are the one who is looking at it. If you are watching the flowers, one thing is certain: you are not the flower, you are the watcher.  Watching is the key of meditation. Watch your mind. Don't do anything - no repetition of mantra, no repetition of the name of god - just watch whatever the mind is doing. Don't disturb it, don't prevent it, don't repress it; don't do anything at all on your part. You just be a watcher, and the miracle of watching is meditation. As you watch, slowly mind becomes empty of thoughts; but you are not falling asleep, you are becoming more alert, more aware. As the mind becomes completely empty, your whole energy becomes aflame of awakening. This flame is the result of meditation. So you can say meditation is another name of watching, witnessing, observing - without any judgement, without any evaluation. Just by watching, you immediately get out of the mind....
Whatever Maharishi Mahesh Yogi and other people like him are doing is good, but they are calling something meditation which is not. That's where they are leading people astray. If they had remained sincere and authentic and told people that this will give you mental health, physical health, a more relaxed life, a more peaceful existence, it would have been right. But once they started calling it 'transcendental meditation' they have raised a very trivial thing to an ultimate significance which it cannot fulfill. People have been in transcendental meditation for years, and in the East, for thousands of years. But that has not become their self-knowing, and that has not made them Gautam Buddhas.

If you want to understand exactly what meditation is, Gautam Buddha is the first man to come to its right, exact definition - that is witnessing.