ether
Definitions
A clear, volatile, highly flammable liquid used as a solvent and formerly as an anesthetic.
A substance once thought to permeate all space and serve as a medium for the propagation of light waves.
The clear sky; the upper regions of air beyond the clouds.
Examples
The faint scent of perfume seemed to vanish into the ether.
In the nineteenth century, ether was commonly used as an anesthetic during surgical procedures.