aether

noun/ˈiːθər/

Frequency rank: #16,525 most common English word

Meaning

A hypothetical, invisible substance once thought to fill outer space and the upper regions of the atmosphere beyond the clouds.

Illustration for the English word “aether”

Example sentence

Ancient philosophers believed that the stars and planets moved through aether, an invisible substance filling the heavens.

Synonyms & related words

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