Pronunciation: (i-thēr'ē-ul),[key] —adj. 1. light, airy, or tenuous: an ethereal world created through the poetic imagination. 2. extremely delicate or refined: ethereal beauty. 3. heavenly or celestial: gone to his ethereal home. 4. of or pertaining to the upper regions of space.
5. Chem.pertaining to, containing, or resembling ethyl ether. Also,aethereal(for defs. 1–4).