Ayurveda is the science of life, Knowledge about Life or a sensible way of living based on Knowledge.
It is also a system of medicine in the sense that it systematises and applies the knowledge about health and disease, i.e. balanced and unbalanced stated of living beings and how unbalances states can be corrected and the restored balance maintained.
According to Ayurveda, health is not merely considered to be a state of freedom from diseases, but rather a state of enjoying uninterrupted physical, mental and spiritual happiness and fulfilment.