n.

1. 气味
2. 气氛
   The meeting was convened in an aura of peace and harmony.

   会议在和平及和谐的气氛中进行。

3. 灵气
4. 【医】（中风等症的）预兆
5. 光环

n.

1. the distinctive atmosphere or quality that seems to be generated by someone or something.
2. (in spiritualism and some forms of alternative medicine) a supposed emanation surrounding the body of a living creature.
3. Medicine  a warning sensation experienced before an attack of epilepsy or migraine.