1
a
: the rarefied element formerly believed to fill the upper regions of space
b
: the upper regions of space : heavens
2
a
: a light volatile flammable liquid C4H10O used chiefly as a solvent and especially formerly as an anesthetic
b
: any of a class of organic compounds characterized by an oxygen atom attached to two carbon atoms
Examples of ether in a Sentence
The balloon disappeared into the ether.
Recent Examples on the Web
The wipeout marked a dark spot for the digital assets market in an otherwise strong year for cryptocurrencies that saw bitcoin and ether hit record highs.
—
Liz Napolitano, CNBC, 22 Oct. 2025
The rapid proliferation and growth of spot ETFs like those for bitcoin and ether – as well as the potential for dozens more once regulatory operations resume at full capacity – also ties into another important change.
—Sean Stein Smith, Forbes.com, 18 Oct. 2025
In the past 24 hours, roughly $5 billion of bitcoin has been liquidated, along with about $4 billion of ether and about $2 billion of solana, according to CoinGlass.
—Auzinea Bacon, CNN Money, 11 Oct. 2025
Physicists invented ether as a medium through which light waves traveled.
—Dipangkar Dutta, The Conversation, 3 Oct. 2025
See All Example Sentences for ether
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Liz Napolitano, CNBC, 22 Oct. 2025
The rapid proliferation and growth of spot ETFs like those for bitcoin and ether – as well as the potential for dozens more once regulatory operations resume at full capacity – also ties into another important change.
—Sean Stein Smith, Forbes.com, 18 Oct. 2025
In the past 24 hours, roughly $5 billion of bitcoin has been liquidated, along with about $4 billion of ether and about $2 billion of solana, according to CoinGlass.
—Auzinea Bacon, CNN Money, 11 Oct. 2025
Physicists invented ether as a medium through which light waves traveled.
—Dipangkar Dutta, The Conversation, 3 Oct. 2025
See All Example Sentences for ether
Cite this Entry
“Ether.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/ether. Accessed 3 Nov. 2025.
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Medical Definition
ether
noun1
: a medium that in the wave theory of light permeates all space and transmits transverse waves
2
a
: a light volatile flammable liquid C4H10O used especially formerly chiefly as an anesthetic
called also diethyl ether, ethyl ether, ethyl oxide
b
: any of various organic compounds characterized by an oxygen atom attached to two carbon atoms
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