life, living matter and, as such, matter that shows certain attributes that include responsiveness, growth, metabolism, energy transformation, and reproduction. Although a noun, as with other defined entities, the word life might be better cast as a verb to reflect its essential status as a process.a father or mother; one who begets or one who gives birth to or nurtures and raises a child; a relative who plays the role of guardian. antonyms: child. a human offspring (son or daughter) of any age.