originally was the personification of the "upper sky", space and heaven, in Greek mythology.
The term aether, æther or ether may also refer to one of the following:
Science and engineering
- The aether of classical elements is a concept, historically, used in science (as a medium) and in philosophy (as a substance).
- Any number of aether theories in alchemy, natural philosophy, and modern physics which suppose a "fifth element".
- Luminiferous aether, in early physics considered to be the medium through which light propagates
- Ether, a class of chemical compounds, or specifically: