ether
noun uk/ˈiː.θər/ us/ˈiː.θɚ/
(MEDICAL)
[ U ]（尤指旧时用于麻醉的）醚，乙醚
a clear liquid used, especially in the past, as an anaesthetic to make people sleep before a medical operation
Ether anaesthesia was introduced in 1846.
Police said he drugged her with ether and handcuffed her to a wall.
(SKY)
the ether[ S ] 苍穹，太空；无线电波
the sky or the air, especially considered as being full of radio waves
Mobile smartphones allow users to see each other as they talk over the ether.
A few years ago, we sent purchase orders through the mail rather than the ether of a computer network.