Pronunciation: /ˈiːθər/
noun the clear sky; the upper regions of air beyond the clouds
A1 Ether is a type of gas that was once believed to fill the universe.
A2 In ancient times, people thought that the stars were held up in the ether.
B1 Scientists now know that the concept of ether is not accurate and have different theories about the universe.
B2 The idea of ether as a substance that permeates all space has been debunked by modern physics.
C1 In the history of science, the concept of ether played a significant role in understanding the nature of light and waves.
C2 The ether theory was eventually replaced by the theory of relativity, which revolutionized our understanding of space and time.
formal The scientist conducted experiments to study the properties of ether.
informal I heard that ether is used as an anesthetic in surgeries.
slang Some people believe that inhaling ether can make you feel high.
figurative The artist used ether as a metaphor for the intangible essence of love in his painting.
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