1. (n.) Any subtle, invisible emanation or quality; as, an aura of respectability; an aura of compassion\, an effluvium, or exhalation from a substance, as the aroma of flowers, the odor of the blood, a supposed fertilizing emanation from the pollen of flowers, etc.

2. (n.) The peculiar sensation, as of a light vapor, or cold air, rising from the trunk or limbs towards the head, a premonitory symptom of epilepsy or hysterics.

air ambiance ambience anthelion antisun appearance aroma aspect atmosphere aureole blaze of glory brilliance brilliancy character charisma circle climate corona countersun ectoplasm ectoplasy effluvium emanation envelope exteriorized protoplasm feel feeling glamour glory halo illustriousness lunar corona lunar halo luster magic milieu mock moon mock sun mood moon dog mystique nimbus note numinousness odor overtone paraselene parhelic circle parhelion quality radiance rainbow resplendence resplendency ring semblance sense solar corona solar halo spirit splendor suggestion sun dog tone undertone