Adjective
1. characterized by lightness and insubstantiality; as impalpable or intangible as air;
"figures light and aeriform come unlooked for and melt away"- Thomas Carlyle"aerial fancies""an airy apparition""physical rather than ethereal forms"2. of or containing or dissolved in ether;
"ethereal solution"3. of heaven or the spirit;
"celestial peace""ethereal melodies""the supernal happiness of a quiet death"4. characterized by unusual lightness and delicacy;
"this smallest and most ethereal of birds""gossamer shading through his playing"