Dictionary 1. (v. & a.) Fixed foundation; established basis.2. (v. & a.) The region of the air; the sky or heavens. 3. (v. & a.) The orb of the fixed stars; the most remote of the celestial spheres. Thesaurus Caelus air azure blue sky caelum canopy canopy of heaven cerulean cope empyrean ether heaven heavens hyaline lift lifts sky starry heaven the blue the blue serene vault vault of heaven welkin |