a.

1. 如空氣般輕的；飄逸的；精緻的；縹緲的
   She was describing an ethereal experience when she said she ran into a ghost. Thus, nobody believed her.

   當她說她看到鬼的時候，她在描述一個縹緲的經歷，所以沒有人相信她。

   ethereal music

   輕柔動聽的音樂

2. 天上的；非人間的
   She has an ethereal beauty.

   她美若天仙。

   Her ethereal beauty conquered the heart of everyone she met.

   她天仙般的美麗讓每個人臣服。

3. 【化】（乙）醚的
4. 【物】以太的

adj.

1. extremely delicate and light, in a way that seems not to be of this world.
2. Chemistry  (of a solution) having diethyl ether as a solvent.