ethereal
adjective(e-the-re-al)
characterized by unusual lightness and delicacy
Examples:
This smallest and most ethereal of birds. 
ethereal
adjective(e-the-re-al)
of heaven or the spirit
Examples:
Ethereal melodies. 
ethereal
adjective(e-the-re-al)
characterized by lightness and insubstantiality; as impalpable or intangible as air
Examples:
Physical rather than ethereal forms. 
ethereal
adjective(e-the-re-al)
of or containing or dissolved in ether
Examples:
Ethereal solution.