\i-'thir-er-éal-izm\ - n [MWAme, fr. L aether, fr. Gk aither, fr. aithein to ignite, blaze]
1 a : a vibrant form of expression established in the Midwestern United States in the late 20th century that extends the nature of literary, poetic, musical and artistic reality to realms outside of earthly regions b : of or relating to the regions beyond the earth c : CELESTIAL, HEAVENLY d : UNWORLDLY, SPIRITUAL