Life cannot be defined. It must not be. Life is the sky. Life is the wind. Life is an ocean. Life is a forest. Life is ethereal beauty. Cal all these manifestations of nature be defined. Certainly, No. One should not strive to encompass life within a definition. Life is an invaluable gift from Nature; therefore, it is beyond any definition.  It is divine in nature. Man needs to explore its nature and engage with its process of evolution.  It is a realization as coolness of water , fragrance of a flower and beauty of spring.