aether
/ˈiːθər/
noun
- In ancient and medieval science, a substance believed to fill the upper regions of space beyond the moon, often thought of as a pure, invisible element.
- Ancient philosophers believed the stars were made of aether, a perfect and unchanging substance.
- The idea of aether was used to explain how light traveled through empty space.
- In medieval cosmology, aether was considered the fifth element, different from earth, air, fire, and water.
- A poetic or literary term for the clear sky or the upper air.
- Looking up at the stars, she felt as if she could float into the aether.
- The poet wrote about the aether as a realm of pure light and peace.
- The birds soared into the aether, disappearing among the clouds.