1. characterized by lightness and insubstantiality; as impalpable or intangible as air

- physical rather than ethereal forms

Similar word(s): insubstantial, unreal, unsubstantial, aerial, aeriform, aery, airy

2. of or containing or dissolved in ether

- ethereal solution

3. of heaven or the spirit

- ethereal melodies

Similar word(s): heavenly, celestial, supernal

4. characterized by unusual lightness and delicacy

- this smallest and most ethereal of birds

Similar word(s): delicate, gossamer