According to W.H.O. (World Health Organization):
Health is a state of complete physical, mental & social wellbeing and not just absence of disease or infirmity.
(Official record of W.H.O., no.2 page 100)
According to Ayurveda:
समदोषः समाग्निस्च समधातुमलक्रिय:।
प्रसन्नात्मेन्द्रियमना: स्वस्थ इत्यभिधीयते :।।
Susruta Samhita (Textbook on Surgery written by Maharshi Susruta) has stated the same above before thousand years ago in Sanskrit (Ancient Language) with special emphasis on all aspect of Spiritual, Mental & Physical Health of a living being.