Definition of Ethereal

Adjective: ethereal i'theer-ee-ul

Characterized by lightness and insubstantiality; as impalpable or intangible as air
"physical rather than ethereal forms";
- aeriform, aerial, airy, aery
(chemistry) of, containing or dissolved in ether
"ethereal solution"
Of heaven or the spirit
"ethereal melodies";
- celestial, supernal
Characterized by unusual lightness and delicacy
"this smallest and most ethereal of birds";
- gossamer