Definition of "etherial"

Sure he preſum'd of praiſe, vvho came to ſtock / Th' etherial paſtures vvith ſo fair a flock; / Burniſh'd, and bat'ning on their food, to ſhovv / The diligence of carefull herds belovv.

1687, [John Dryden], “[The First Part]”, in The Hind and the Panther. A Poem, in Three Parts, 2nd edition, London: […] Jacob Tonson […], page 22

Etherial visitants of earth, / Foiled benefactors, proves your worth / But sundry texts, disowned in mart, / Light scratched, not graved on man's hard heart?

1876, Herman Melville, “Canto XVIII. The Hill-side.”, in Clarel: A Poem and Pilgrimage in the Holy Land. […], volume II, New York, N.Y.: G[eorge] P[almer] Putnam’s Sons […], part IV (Bethlehem), pages 512–513