a distinctive air or quality considered to be characteristic of a person or thing
2.
any invisible emanation, such as a scent or odour
3. pathology
strange sensations, such as noises in the ears or flashes of light, that immediately precede an attack, esp of epilepsy
4.
(in parapsychology) an invisible emanation produced by and surrounding a person or object: alleged to be discernible by individuals of supernormal sensibility