Angel: a spiritual being that is much more powerful than a human being. The word angel is thought to be derived from the Greek word angeloi which means "messenger". Throughout the bible it is generally seen that the will of God is usually imparted or carried out by angels. A fallen angel is often classed as a devil, like Satan himself; whereas a guardian angel is classed as a human guide or protector. Angels do not die or age, they are immortal, created by God and existing since the Creation. Generally they are accepted as being the guardians of souls.