Sama dosah samagnis ca sama dhatu mala kriyah prasannamendriya manah vastha ityabhidhiyate. Sushruta Samhita 15.38
One who is established in self, who has balanced doshas, balanced agni, properly formed dhatus, proper elimination of malas, well functioning bodily processes and whose mind, soul and senses are happy is called a healthy person.
This quote from the Sushruta Samhita, one of the classical Ayurvedic texts summarizes the Ayurvedic model of health. The definition is both philosophical and functional in its understanding of the individual constitution.