1. An invisible breath, emanation, or radiation: There seemed to be an aura in the flower garden, or an indiscernible emanation or vapor surrounding the couple while they were walking slowly through the pergola.
2. A distinctitve but intangible quality that seems to surround a person or thing; atmosphere: The old villa had an aura or feeling of times long past.

Kitty's elderly mom still had that special aura that attracted Kitty each time they got together, even after so many years.
3. In medicine, a sensation, as of a cold breeze or a bright light, that precedes the onset of certain disorders, as an epileptic seizure: Gary felt the aura of an oncoming attack of migraine.
4. Etymology: from Latin aura "breeze, a breath of air, wind, air" and from Greek aura "breeze, breath".

An epileptic aura characterized by illusions or hallucinations: An auditory aura is a peculiar sensation or phenomenon only perceived by the patient and which precedes an epileptic seizure with dizziness, visual disorder, and sometimes disturbances of sound.