[au.ra] n [ME, fr. L, puff of air, breeze, fr. Gk; prob. akin to Gk aer air] (1732) 1 a: a subtle sensory stimulus (as an aroma) b: a distinctive atmosphere surrounding a given source "the place had an ~ of mystery"
2: a luminous radiation: nimbus
3: a subjective sensation (as of lights) experienced before an attack of some disorders (as epilepsy or a migraine)
4: an energy field that is held to emanate from a living being