| ETH | a flammable colorless gaseous alkene |
|---|---|
| ETH | a colorless volatile highly inflammable liquid used as an inhalation anesthetic |
| ETH | a medium that was once supposed to fill all space and to support the propagation of electromagnetic waves |
| ETH | (archaic) the fifth and highest element after air and earth and fire and water |
| ETH | characterized by lightness and insubstantiality |
| ETH | characterized by unusual lightness and delicacy |
| ETH | of heaven or the spirit |
| ETH | (chemistry) of or containing or dissolved in ether |
| ETH | make ethereal |
| ETH | make ethereal |
| ETH | change into an ether |
| ETH | anesthetize with ether |