aether

noun/ˈiːθər/

Frequency rank: #16,525 of 20,003 in the WORDED list (wordfreq data)

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

More words in ranks 16,501–16,600