Read this article by Sri Swami Shivapremananda. A really good one in explaining meditation.
In the West, the word ‘meditation’ means a concentrated state of mind in serious reflection. The Latin root of the word meditation, mederi, means ‘to heal’. It is an effort to heal afflictions of the mind, the hurt ego, by trying to understand the cause of the problem and finding a way to solve it, that is, by knowing what counter-measures to take. To meditate thus, is to deepen a state of understanding.
Read the full article here