Aura: an energy field that is held to emanate from a living being [Merriam-Webster]
Aura: a supposed emanation surrounding the body of a living creature, which is allegedly visible to some... [Oxford Dictionary p.111]
Aura: paranormal force emanating from somebody or something: a force that is said to surround all people and objects, discernible, often as a bright glow, only to people of unusual psychic sensitivity [Encarta® World English Dictionary]