Meaning of “ether” in the English Dictionary

"ether" in British English

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uk /ˈiː.θər/ us /ˈiː.θɚ/

ether noun (MEDICAL)

[ U ] a clear liquid used, especially in the past, as an anaesthetic to make people sleep before a medical operation

ether noun (SKY)

the ether [ S ]

the sky or the air, especially considered as being full of radio waves

(Definition of “ether” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"ether" in American English

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ethernoun [ U ]

us /ˈi·θər/

chemistry a colorless liquid used, esp. in the past, to put people to sleep before an operation

(Definition of “ether” from the Cambridge Academic Content Dictionary © Cambridge University Press)